Among the more common --if not the most common-- houseplant members of the Sunflower Family, is my featured genus this month: Gynura. Inconsistent names are used for these plants in horticultural books, websites and nursery catalogs. This article attempts to clarify the matter. Most credit is due to research published in 2008 and 2009 by Dr. Ongkarn Vanijajiva, of Phranakhon Rajabhat University, Thailand. |
Unlike most Sunflower Family plants used as houseplants, the Gynura genus is tropical. It consists of 44 species of perennials or subshrubs. They are native from Africa to S Asia east through S China, Japan, SE Asia and New Guinea into N Australia; growing in open places, such as forest gaps, or along riversides or roadsides. Below, reflecting their presence in western cultivation, I treat only 3 of the 44 species, and 1 hybrid.
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Velvet Plant. Purple Velvet Plant. Royal Velvet Plant. Velvet Tree. Purple Passion Tree |
Gynura aurantiaca (Bl.) A. DC.
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Native to Sri Lanka, India, China and Indonesia; in open places in evergreen forests; an abundant weed.
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A robust subshrub 3 to 6.5 feet (1-2 m) high or more, its stout stems erect, densely to sparsely ± purple-hairy. Leaves up to 7 inches long by 4 inches wide, egg-shaped or lyrate with 1-3 pairs of lobes. The leaves are thick and usually plush with velvety purple hairs. But if there is too much shade, or the atmosphere is too dry, or too hot, then they become less hairy. The brick-red to yellow flowers are malodorous and often cut off. It is grown, like its cousins, for pleasing foliage, not floral beauty.
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Glasshouse Works reports: "best grown in a warm winter greenhouse/conservatory situation. Definitely not a houseplant nor an outstanding (predictable?) patio subject like the other species. Not for easily exasperated growers: upright stems may topple with time or sheer lack of backbone, so best to stake early on."
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In past decades it was more common; now is rare, replaced by its hybrid 'Purple Passion' (below) --which however, may be sold incorrectly under the Gynura aurantiaca name. I have not grown this species.
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Purple Passion Vine or Plant. Purple Velvet-Plant |
Gynura 'Purple Passion' |
= Gynura aurantiaca 'Purple Passion' |
= Gynura aurantiaca 'Sarmentosa' |
= Gynura sarmentosa var. hirsuta hort. |
= Gynura sarmentosa hort. non (Bl.) DC. |
= Gynura procumbens hort. non (Lour.) Merr.
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This is the very common ornamental houseplant representative of the genus. The clone is of obscure origin, first widely cultivated in the mid- to late 1960s, its Purple Passion name coined by North American florists around 1971. Compared to G. aurantiaca, it is more purple-hairy, graceful and slender in stems and leaves, eventually flopping about like a vine. People enjoy touching its thick succulent leaves, darkest green on top, and shiny purple with hairs beneath. Its flowers are egg-yolk yellow.
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A 1981 scholarly paper by Frances G. Davies reported of it: "The nearest morphological match among wild individuals is a Javanese G. procumbens in all respects similar but quite hairless." However, most people think a more likely origin is that it is a hybrid between G. aurantiaca and G. procumbens. Raising seedlings from it and observing them, or trying intentional crosses between its supposed parents, would prove the matter.
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It is very easily grown indoors, unlike G. aurantiaca. It can tolerate more winter chill, and lower humidity. If keeping the plant compact rather than flopping all over is desired, simply pinch it back. Try to not get water on the leaves, as they can get ugly brown spots of rot when their thick hairs trap it. Do not let it fry in full sun, but give it bright indirect light. I have grown a specimen since 2010.
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Okinawa or Okinawan Spinach. Oakleaved Velvet-Plant |
Gynura bicolor (Roxb. ex Willd.) A. DC. |
= Gynura angulosa var. petiolata Hook. |
= Gynura crepidioides hort. non Benth. |
= Cacalia bicolor Roxb. ex Willd.
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Native to S China, Burma and Thailand; widely cultivated there and elsewhere. Grows 3 to 13 feet (1-4m) high, stems erect, fleshy to subsucculent, sparsely hairy. Leaves slender, up to 16 inches long by 6 inches wide (but usually half that size), usually dark green or rich purple beneath, densely to sparsely hairy, margins sharply toothed. Flowers dark red to orange-yellow, their stems hairy. |