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Delairea odorata
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Delairea odorata
Delairea odorata is a climber within the family Asteraceae that is native to South Africa. One of the two species in the genus Delairea (the other being Delairea aparadensis), it was previously included in the genus Senecio as Senecio mikanioides. It is known as Cape ivy in some parts of the world (US) and German ivy in others (Britain, Ireland). Other names include parlor ivy and Italian ivy.
It is a twining perennial, herbaceous plant that grows 3 metres tall. Its multi-lobed leaves somewhat resemble those of the unrelated English ivy. Originally used as an ornamental plant on trellises and as groundcover, it is now rarely cultivated because of its invasiveness, in addition to being a weed.
Delairea odorata is a fast-growing vine that can climb to heights of 2–4 metres (7–13 ft).
The glossy and semi-succulent leaves, which are 3–10 centimetres (1+1⁄4–4 in) long and 3–8 centimetres (1+1⁄4–3+1⁄4 in) wide, are alternately arranged along the stems. They have 3-10 rather broad lobes. The upper leaf surface is light green, usually with a somewhat purple cast, while the reverse is somewhat silvery.
The plant's stems and leaves will die between late summer and early autumn, being superseded by new shoots that employ the old stems as climbing support.
Its sweet-scented discoid flowers are yellow, and lack the petal-like ray florets found in typical daisies. They have tiny tubular florets surrounded by an involucre of 8-10 small green phyllaries (3–5 millimetres (15⁄128–25⁄128 in) long). Flower-heads (2–7 millimetres (5⁄64–35⁄128 in) across and 2–5 millimetres (5⁄64–25⁄128 in) long) occur in compact clusters at the ends of the branches (terminal corymbs), with clusters consisting of about 15-50 flower-heads. Flowering occurs mostly during winter to early spring.
The seeds (or achenes) are approximately 2 millimetres (5⁄64 in) long and are reddish-brown in colour, with a pappus of silky white hairs that is 5–6 millimetres (25⁄128–15⁄64 in) long. Most of its seed in North America and possibly elsewhere is unviable, which may be due to a lack of effective pollinators. However, the plant readily reproduce from stem fragments, stolons, or rhizomes as small as 2.5 centimetres (63⁄64 in).
This plant is somewhat scarce in its native country of South Africa, where it was originally found in the Drakensberg Mountains, on forest edges, at elevations above 1,500 metres (4,900 ft), in moist areas. Its presence in coastal areas (some of which are arid) in South Africa is probably more recent. In California, it is generally found in the coastal fog belt, with a few specimens found inland, particularly in subtropical riparian sites that feature permanent moisture.
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Delairea odorata
Delairea odorata is a climber within the family Asteraceae that is native to South Africa. One of the two species in the genus Delairea (the other being Delairea aparadensis), it was previously included in the genus Senecio as Senecio mikanioides. It is known as Cape ivy in some parts of the world (US) and German ivy in others (Britain, Ireland). Other names include parlor ivy and Italian ivy.
It is a twining perennial, herbaceous plant that grows 3 metres tall. Its multi-lobed leaves somewhat resemble those of the unrelated English ivy. Originally used as an ornamental plant on trellises and as groundcover, it is now rarely cultivated because of its invasiveness, in addition to being a weed.
Delairea odorata is a fast-growing vine that can climb to heights of 2–4 metres (7–13 ft).
The glossy and semi-succulent leaves, which are 3–10 centimetres (1+1⁄4–4 in) long and 3–8 centimetres (1+1⁄4–3+1⁄4 in) wide, are alternately arranged along the stems. They have 3-10 rather broad lobes. The upper leaf surface is light green, usually with a somewhat purple cast, while the reverse is somewhat silvery.
The plant's stems and leaves will die between late summer and early autumn, being superseded by new shoots that employ the old stems as climbing support.
Its sweet-scented discoid flowers are yellow, and lack the petal-like ray florets found in typical daisies. They have tiny tubular florets surrounded by an involucre of 8-10 small green phyllaries (3–5 millimetres (15⁄128–25⁄128 in) long). Flower-heads (2–7 millimetres (5⁄64–35⁄128 in) across and 2–5 millimetres (5⁄64–25⁄128 in) long) occur in compact clusters at the ends of the branches (terminal corymbs), with clusters consisting of about 15-50 flower-heads. Flowering occurs mostly during winter to early spring.
The seeds (or achenes) are approximately 2 millimetres (5⁄64 in) long and are reddish-brown in colour, with a pappus of silky white hairs that is 5–6 millimetres (25⁄128–15⁄64 in) long. Most of its seed in North America and possibly elsewhere is unviable, which may be due to a lack of effective pollinators. However, the plant readily reproduce from stem fragments, stolons, or rhizomes as small as 2.5 centimetres (63⁄64 in).
This plant is somewhat scarce in its native country of South Africa, where it was originally found in the Drakensberg Mountains, on forest edges, at elevations above 1,500 metres (4,900 ft), in moist areas. Its presence in coastal areas (some of which are arid) in South Africa is probably more recent. In California, it is generally found in the coastal fog belt, with a few specimens found inland, particularly in subtropical riparian sites that feature permanent moisture.
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