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Tigridia
Tigridia pavonia in Mexico
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Iridaceae
Subfamily: Iridoideae
Tribe: Tigridieae
Genus: Tigridia
Juss.
Type species
Tigridia pavonia
Synonyms[1]
List
    • Ainea Ravenna in Bot. Not. 132: 467 (1979)
    • Beatonia Herb. in Bot. Mag. 66: t. 3779 (1840)
    • Cardiostigma Baker in J. Linn. Soc., Bot. 16: 102 (1877)
    • Colima (Ravenna) Aarón Rodr. & Ortiz-Cat. in Acta Bot. Mex. 65: 53 (2003)
    • Fosteria Molseed in Brittonia 20: 232 (1968)
    • Hydrotaenia Lindl. in Edwards's Bot. Reg. 24(Misc.): 69 (1838)
    • Pardinia Herb. in Edwards's Bot. Reg. 30(Misc.): 66 (1844)
    • Rigidella Lindl. in Edwards's Bot. Reg. 26: t. 16 (1840)
    • Sessilanthera Molseed & Cruden in Brittonia 21: 191 (1969)

Tigridia /taɪˈɡrɪdiə/,[2] is a genus of bulbous or cormous flowering plants belonging to the family Iridaceae. With common names including peacock flowers,[3] tiger flowers, jaguar flowers,[4] or shell flowers, they have large showy flowers; and one species, Tigridia pavonia, is often cultivated for this. The approximately 60 species in this family grow in the Americas, from Mexico down to Chile.[1]

The tigridia flower is short lived, each often blooming for only one day, but often several flowers will bloom from the same stalk. Usually they are dormant during the winter dry-season. The roots are edible and were eaten by the Aztecs of Mexico who called it cacomitl, and its flower ocēlōxōchitl meaning "jaguar flower".[4]

It was first published by French botanist Antoine Laurent de Jussieu in his book Genera plantarum on page 57 in 1789.[1]

The genus name Tigridia means "tiger-like", and alludes to the coloration and spotting of the flowers of the type species Tigridia pavonia.[5][6][7]


Species

[edit]

There are 60 species accepted by Plants of the World Online;[1]

Hybrids

[edit]

Several hybrids exist, including; Tigridia × mathewii J.M.H.Shaw, first published in Phytoneuron 2015-53: 4 in 2015. It is an artificial hybrid, a cross of T. orthantha × T. pavonia.[8]

Distribution

[edit]

They are native to the countries (and regions) of; northern Chile, El Salvador, Guatemala, Honduras, Mexico and Peru.[1]

They have been introduced into: Bolivia, Colombia, Ecuador and Madeira.[1]

References

[edit]

Other sources

[edit]
  • Rodriguez, A. and K. Sytsma. 2006. Phylogeny of the "Tiger-flower" group (Tigrideae: Iridaceae): Molecular and morphological evidence. Pp. 412–424, in J.T. Columbus, E.A. Friar, J.M. Porter, L.M. Prince and M.G. Simpson (eds.). Monocots: Comparative Biology and Evolution, Vol. 1. Rancho Santa Ana Botanic Garden, Claremont.


Wikimedia Commons has media related to Tigridia.
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Tigridia

View on Grokipedia
from Grokipedia
Tigridia is a genus of 63 species of bulbous or cormous perennial plants in the iris family (Iridaceae), native primarily to Mexico, Guatemala, and parts of South America. These plants are renowned for their striking, short-lived flowers, which measure 3 to 6 inches across and feature vibrant colors such as white, pink, red, orange, and yellow, often with contrasting spotted centers resembling tiger markings—hence common names like tiger flower, peacock flower, and Mexican shell flower. The flowers consist of three large outer petals and three smaller inner ones, blooming successively on stems for several weeks during summer, though individual blooms last only one day. Plants typically reach 1.5 to 2 feet in height with pleated, fan-like leaves similar to those of gladioli. Native to and forests as well as roadsides in their tropical habitats, Tigridia species have been utilized by indigenous peoples, particularly the , for and ; the corms are edible when baked, tasting like sweet potatoes, though raw they cause a burning sensation in the mouth. The most well-known species, , is widely cultivated for its ornamental value, producing eye-catching displays in gardens. Cultivation is straightforward in well-drained, sandy or loamy soils with full sun to partial shade, though in colder climates (USDA zones below 8), bulbs must be lifted and stored over winter to prevent damage from frost. These plants attract pollinators and show resistance to deer and rabbits, making them popular for summer borders and containers.

Description

Morphology

Tigridia exhibit a cormous growth habit, emerging from tunicated underground corms that serve as storage organs, typically 1-3 cm in diameter. These herbaceous perennials grow to heights of 30-60 cm, with new growth appearing in spring and dying back in autumn. The overall structure is adapted to seasonal environments, featuring a robust basal rosette that supports the flowering stems. The leaves are primarily basal, sword-shaped, and arranged in a pleated fan, measuring 20-40 cm in length and 1-2 cm in width, often displaying a or grass-like texture. Erect stems arise from the center of the rosette, typically unbranched or sparsely branched, and bear 2-3 smaller cauline leaves that are linear and reduced in size compared to the basal ones. This leaf arrangement provides and photosynthetic capacity during the active growth phase. Flowers are borne singly or in succession on the stems, featuring a that is actinomorphic to slightly zygomorphic, composed of six tepals in two distinct whorls. The outer three tepals are larger, spreading, and often uniformly colored, while the inner three are upright, smaller, and form a central cup or blotch adorned with contrasting spots that evoke tiger stripes or peacock feather patterns. The develops as a loculicidal capsule, dehiscent along three apical valves, enclosing numerous small, brown seeds arranged in two rows per locule. The root system comprises fibrous roots originating from the corm base, anchoring the plant and facilitating nutrient uptake in well-drained soils.

Flowering and Reproduction

Tigridia species typically flower from summer to early autumn, coinciding with the rainy season in their native habitats of and , where precipitation triggers growth and blooming. Individual flowers are ephemeral, lasting approximately one day, but plants produce successive blooms over a period of 4 to 6 weeks per , ensuring prolonged reproductive opportunities despite the short lifespan of each bloom. The inflorescence consists of 1 to 5 flowers per scape, with blooms generally opening in the morning or afternoon and closing by evening, a adapted to diurnal pollinators. Pollination in Tigridia is primarily entomophilous, facilitated by bees and bumblebees attracted to the bright, contrasting colors of the tepals and the nectar secreted from specialized nectaries on the inner tepals. Many species are allogamous, with self-pollination being rare, promoting outcrossing and genetic diversity through mechanisms that prevent or limit self-fertilization. Following successful cross-pollination, Tigridia produces loculicidal capsules containing numerous seeds, which are primarily dispersed by gravity or water in their natural environments. Seeds from cross-pollination yield fertile offspring, germinating to form new bulbels after dispersal, with the process often taking 2 years to reach maturity and flowering; germination is generally free but can be delayed by impermeable seed coats in some species, sometimes requiring scarification rather than cool stratification. Vegetative reproduction occurs through offset corms, which produce new plants annually, allowing clonal propagation alongside sexual reproduction. The cycle of Tigridia is closely tied to seasonal availability, with active growth and during the wet summer season followed by in the dry winter, during which corms persist underground and survive periods of . This enables the plants to endure the variable climates of their highland habitats, resuming growth with the onset of rains.

Taxonomy

Etymology and Classification

The genus Tigridia derives its name from the Latin tigris, meaning "tiger," in reference to the spotted or tiger-like patterns adorning the petals of many species. The type species, T. pavonia, bears an epithet from the Latin pavonia, evoking the peacock (Pavo), due to the flower's vibrant, eye-spotted display reminiscent of the bird's plumage. The genus was first formally described by in his 1789 publication Genera Plantarum, where it was placed among monocots with affinities to what later became distinct families. Initially aligned with in early classifications based on bulbous habit and structure, Tigridia was subsequently transferred to in the following advancements in understanding its distinctive iris-like floral and morphology. In current , Tigridia resides in the subfamily Iridoideae and Tigridieae within the family. It forms a monophyletic group encompassing approximately 30–63 species, with (POWO) recognizing 63 accepted taxa as of 2023. Phylogenetic studies, including a integrating molecular sequences ( trnL-F and nuclear ITS) and morphological traits, affirm its origins, tracing diversification from South American ancestors to a primary center in Mexico-Guatemala, with extensions southward to . No formal subgenera are recognized within Tigridia, though informal groupings have been proposed based on numbers, which are typically 2n=28 (base number x=14 in diploids), and patterns of such as actinomorphic versus zygomorphic forms. Synonymy has broadened the through mergers of related ; for example, the former Rigidella—characterized by similar cormous growth and floral features—was subsumed into Tigridia, contributing to expanded counts in revised classifications, such as 41 in some pre-POWO treatments.

Accepted Species

The genus Tigridia comprises 63 accepted species according to (Kew Science), though taxonomic counts vary due to ongoing revisions and new discoveries in the Neotropics. is highest in , with additional endemics in Central and , reflecting adaptations to diverse montane and subtropical environments. Identification typically relies on floral traits such as color and spotting patterns, tunics (often fibrous or reticulate), and leaf width (narrow in high-elevation species versus broader in lowland forms). Tigridia pavonia (L.f.) Redouté, the , is widespread from to and is distinguished by its bulbous geophyte habit and showy flowers featuring three broad outer tepals in shades of white, pink, red, or yellow, contrasted by inner tepals with distinctive red or orange spotting that gives the genus its "tiger flower" . This species grows primarily in subtropical biomes, often at elevations up to 2,500 m. Other notable species include T. albicans , endemic to southern and adapted to or dry , with a tunicated and likely pale tepals inferred from its . T. alpestris Molseed occurs in Mexican highlands, characterized by narrower leaves and blue-tinged flowers suited to alpine conditions above 3,000 m. T. multiflora () , native exclusively to , produces multiple-flowered inflorescences with yellow to orange tepals and is a key example of the genus's floral diversity in seasonally dry tropical forests. In the , T. pearcei () from features elongated spathes and reddish flowers, while endemics like T. arequipensis Montesinos, A.Pauca & Revilla are restricted to specific Peruvian regions such as . Several Tigridia species face vulnerability from habitat loss in their native ranges, particularly endemics in deforested and Andean regions; for instance, narrow-range taxa like T. raimondii in are at risk due to and climate shifts.

Hybrids

Tigridia hybrids are primarily interspecific crosses developed for enhanced ornamental qualities, such as novel flower colors and growth habits. One notable example is Tigridia × mathewii J.M.H. Shaw, a sterile artificial hybrid resulting from the cross between T. pavonia and T. orthantha (formerly placed in Rigidella). Originating in the 1970s through breeding efforts by Elmer Molseed in the United States and later introduced to cultivation in the , this hybrid was formally named in 2015. It exhibits increased vigor compared to its parents, with corms and foliage resembling T. pavonia but producing abundant bulbils for propagation; flowers are intermediate in form, featuring erect scarlet outer tepals and smaller yellow inner tepals with scarlet and yellow spotting at the base, blooming from to . Another documented interspecific hybrid arises from the cross between T. pavonia and T. augusta, achieved in 2013 using cut-style and ovary slice culture techniques, with T. pavonia as the female parent. This hybrid displays intermediate morphology, combining the taller stature and larger flower size potential of T. pavonia (up to 150 cm tall with 7-10 cm flowers) with the more compact growth of T. augusta (5-30 cm tall with 3-5 cm flowers marked by spots); seedlings showed successful and hybrid confirmation via RAPD analysis, though flowering was not observed in the initial study. Such crosses aim to broaden the color spectrum, incorporating spotting from T. augusta into the diverse palette of T. pavonia. In cultivation, various unnamed interspecific and intraspecific crosses of Tigridia contribute to color diversity, often yielding with heightened vigor and larger blooms but frequently sterile due to chromosomal incompatibilities between parent species, leading to variable offspring and reliance on vegetative propagation. Breeding of Tigridia for garden use began in the early in , where selections of T. pavonia were developed and marketed as landscape , expanding their availability across continents. Modern efforts continue to focus on desirable traits like extended bloom periods and adaptability to temperate climates. Named cultivars, such as the white-flowered 'Alba Immaculata' and the vibrant 'Sunset in Oz', exemplify these selections, offering stable multi-colored options for horticultural display.

Distribution and Habitat

Native Range

The genus Tigridia is native to the , with its primary distribution spanning from southward to in , and disjunct extensions into and northern in . serves as the center of diversity, hosting the majority of the approximately 63 accepted species, many of which are endemic to its highland regions. Endemism patterns are particularly pronounced in Mexico's mountainous terrains, including the , , Sierra Madre del Sur, and the , where species richness peaks with up to 14 co-occurring taxa in central grid cells. In , endemic hotspots occur in volcanic regions of , , and , reflecting adaptations to subtropical and seasonally dry biomes. These patterns underscore the genus's biogeographic ties to the Tigridieae tribe, characterized by disjunct distributions that suggest ancient migrations across North and South America during periods of climatic stability. The historical range of Tigridia aligns with pre-Columbian distributions, notably in central where species like T. pavonia were cultivated by the as an edible plant known as cacomitl. No major range contractions or expansions have been documented following European contact in the 1500s, with the genus maintaining its core native extents. Some species, such as T. pavonia, have established naturalized populations in and , where similar climates facilitate persistence outside the primary native range.

Habitat Preferences

Tigridia thrive in temperate to subtropical climates characterized by wet summers and dry winters, which align with their seasonal growth cycles where foliage emerges during the rainy period and flowers appear in response to availability. These are typically found at elevations ranging from 1,000 to 3,000 meters, often in montane regions that provide cooler temperatures and protection from extreme heat. For instance, species like Tigridia hallbergii occur across a broad altitudinal gradient in open forests, while Tigridia matudae is restricted to higher alpine zones around 2,900–3,000 meters in shady understories. In terms of soil preferences, Tigridia favors well-drained, sandy or rocky loams that prevent accumulation, with a neutral range of 6–7 supporting optimal uptake for their -based growth. Prolonged waterlogging is detrimental, often leading to corm rot due to the ' sensitivity to anaerobic conditions; this is evident in species like Tigridia mexicana, which inhabits clay pans that experience only seasonal flooding rather than persistent saturation. Such substrates are common in their native Mexican and Central American locales, ensuring rapid drainage during dry phases. Associated vegetation includes oak-pine woodlands, open grasslands, and edges of disturbed areas, where Tigridia coexists with companions such as agaves in dry scrub, various grasses in pastures, and plants like in transitional zones. Examples include Tigridia vanhouttei in stunted Quercus forests and Tigridia augusta in central altiplano fields, highlighting their adaptability to both forested and open ecological niches. Ecologically, Tigridia exhibits through its subterranean corms, which store nutrients and water to sustain growth during arid winters, enabling resurgence with seasonal rains. This adaptation is crucial in semiarid to moist environments, as seen in Tigridia ehrenbergii in dry tropical partial shade. However, from and poses significant threats, impacting approximately 20% of the approximately 63 known by reducing available niches and isolating populations, as observed in endangered taxa like Tigridia vanhouttei ssp. roldanii.

Cultivation

Growing Conditions

Tigridia species thrive in full sun, requiring at least six hours of direct sunlight daily to promote robust growth and prolific blooming, though they can tolerate partial shade with reduced flowering. They are hardy in USDA zones 8 through 10, where minimum winter temperatures reach 10°F (-12°C), but in cooler zones below 8, corms must be lifted in fall and stored indoors to prevent frost damage, or heavy mulching can provide protection in marginal zone 8 areas. For optimal cultivation, plant Tigridia in loose, well-drained such as sandy loam amended with or to mimic their native preferences for quick-draining substrates, with a range of 5.5 to 7.5. moderately during the active in spring and summer to keep evenly moist but never waterlogged, as excessive moisture leads to rot; withhold entirely during the dormant winter period to replicate seasonal dryness. Apply a balanced monthly or every two weeks during the growth phase to support flowering, but avoid high-nitrogen formulas that could encourage leggy stems over blooms. Tigridia are generally resistant to major pests and diseases, though they may attract slugs and snails in damp conditions, and fungal bulb rots can occur in overly wet soils; no significant issues are commonly reported. In regions colder than zone 8, overwinter corms by digging them after foliage dies back in late fall, allowing them to dry for a few days, then storing in a cool, dry, frost-free location such as 40-50°F (4-10°C) in mesh bags or trays to prevent buildup and rot.

Propagation Methods

Tigridia plants are primarily propagated vegetatively through corm division, which involves separating offsets from the parent corm to produce genetically identical clones. This method is recommended every three to four years when clumps become crowded, typically performed in early autumn after flowering or in spring before new growth emerges. To propagate, carefully dig up the mature corms, detach the small offsets (cormlets) from the base of the main corm using a clean knife, and replant them immediately or store briefly in a cool, dry place if needed. Plant the offsets 5-8 cm (2-3 inches) deep and 10-15 cm (4-6 inches) apart in well-drained, fertile soil with a pH of 5.5-7.5, ensuring the growing point faces upward. Seed propagation offers a way to introduce but is slower and less predictable, often taking one to two years for to reach blooming size. Collect ripe from dried capsules in late summer or early autumn, and sow them indoors in a sterile seed-starting mix composed of and sand or for optimal drainage. Surface-sow the or lightly cover them, maintaining moist conditions at 18-24°C (65-75°F) under bright, indirect light; typically occurs in 2-6 weeks, though (lightly nicking the seed coat) can improve rates in some species. Transplant hardened-off seedlings outdoors after the last , spacing them 10-15 cm apart in humus-rich, well-drained soil, with night temperatures above 13°C (55°F). While some seedlings may bloom in the first year under ideal conditions, many require additional time, and hybrid offspring may exhibit variability or reduced vigor due to partial sterility in certain crosses. For commercial production of uniform hybrids, is employed, starting with twin-scale explants including basal meristems from healthy corms. These are surface-disinfected and cultured on Murashige and Skoog (MS) basal medium supplemented with cytokinins like 2.0 mg/L thidiazuron (TDZ) for shoot multiplication, yielding up to 6.4 shoots per explant after 4-6 weeks at 25 ± 2°C under a 12-hour photoperiod with 2,000 illumination and 65-70% . Rooting follows on MS medium with 0.5 mg/L (IBA), producing 4-5 roots per shootlet, after which plantlets form tiny bulbs within 120 days and achieve 99% survival upon in a peat-sand mix before transfer to garden soil. This technique is particularly valuable for overcoming low seed viability and sterility barriers in hybrids, enabling rapid scaling to 60 uniform plantlets in four months.

Uses and Cultural Significance

Traditional Uses

In Mesoamerican cultures, particularly among the , Tigridia species were known by specific names reflecting their morphological and utilitarian features. The plant was referred to as cacomitl for its corms and ōcēlōxōchitl (meaning " flower") for its spotted blooms, evoking the jaguar's pattern and symbolizing power and status. The corms served as an important source for the Nahua peoples, including the , who prepared them by or to yield a dry, sweet texture reminiscent of . These cooked corms provided a reliable food staple, harvested from wild or cultivated sources in pre-Columbian times. Medicinally, Tigridia bulbs were used to treat fevers and infertility. Beyond sustenance and healing, Tigridia was cultivated ornamentally in pre-Columbian gardens like the chinampas of Huaxtepec, where flowers adorned crowns and garlands for ceremonial purposes. In contemporary indigenous practices, such as those of Ñäñho communities in southern Querétaro, Mexico, Tigridia species (locally called "liendres" or "cocomite") continue to be gathered from montane areas and eaten raw as snacks, contributing to local food security and nutritional sovereignty amid environmental threats including climate variability, as documented in recent ethnobotanical surveys.

Ornamental Value

Tigridia species, particularly T. pavonia, are prized in modern for their bold, exotic blooms that add a tropical flair to summer gardens. The flowers, available in vibrant hues of red, orange, yellow, pink, and white with striking spotted centers, typically measure up to 6 inches across and are well-suited for mixed borders where they provide dramatic color contrasts. These also thrive in containers on patios or balconies, allowing for versatile placement in smaller spaces, and their unique form makes them excellent for cut flower arrangements in vases. Although individual blooms last only one day, successive flowering from mid- to late summer ensures a prolonged display when planted in groups. In the commercial trade, Tigridia bulbs have been widely available globally through nurseries and online suppliers since their introduction to European cultivation, offering gardeners an accessible option for exotic appeal. They remain popular in the UK and Europe for their eye-catching colors and ease of growth as summer annuals or tender perennials. For landscape integration, Tigridia pairs effectively with summer-blooming perennials such as salvias, which complement its height and color palette while sharing similar sun requirements. The flowers attract bees and butterflies, supporting pollinator biodiversity and enhancing the ecological value of garden designs. Once established, these plants contribute to low-water landscapes as they exhibit moderate drought tolerance, preferring well-drained soil but tolerating drier conditions between waterings. Cultivars of T. pavonia have been selected for improved color variations and reliable performance in temperate gardens, though breeding efforts continue to address the inherent short bloom duration of individual flowers. This limitation necessitates mass plantings to maintain visual impact throughout the season, a practice that also amplifies their role in drought-tolerant ornamental schemes amid rising interest in resilient garden plants.

References

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