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FOC | Family List | FOC Vol. 16 | Convolvulaceae

5. Poranopsis Roberty, Candollea. 14: 26. 1952.

白花叶属 bai hua ye shu

Lianas, dull yellow or grayish villous or sericeous, glabrescent. Leaves simple, petiolate, cordate-ovate, papery, rugulose, abaxially densely pubescent; venation pedate or nearly palmate. Inflorescences axillary (or terminal) bracteate panicles; bracteoles 2, scalelike, basal to calyx. Pedicel filiform. Flowers tiny, often fragrant, fascicled. Sepals free, quincuncial, unequally enlarged, outer 3 greatly enlarged, inner 2 slightly so; midvein 1, secondary veins reticulate. Corolla white, ± funnelform, less than 8 mm; limb 5-lobed, outside villous apically, inside glabrous. Stamens included or exserted; anthers ellipsoid, longitudinally dehiscent; pollen 3-colpate, not spiny. Disc ringlike or absent. Pistil included; ovary unilocular; ovules 4. Style simple (nearly absent in 1 species); stigma 2-globose. Fruit papery, indehiscent. Seed 1, smooth.

Three species: Bhutan, China, India, ?Laos, Myanmar, Nepal, Pakistan, N Thailand, Vietnam; all three species in China.

Fang Rhui-cheng believes that Poranopsis should be reduced to synonymy of Porana.

Poranopsis paniculata is grown as an ornamental in many tropical places, including S Yunnan.

1 Plants in flower.   (2)
+ Plants in fruit.   (4)
2 (1) Style very short, stigma subsessile; stamens ± equal   2 Poranopsis paniculata
+ Style longer than ovary; stamens unequal.   (3)
3 (2) Longest stamens exserted from corolla   1 Poranopsis discifera
+ Longest stamens included within corolla   3 Poranopsis sinensis
4 (1) Outer 3 sepals ovate-cordate to nearly circular; fruit glabrous or with a few hairs near apex only   3 Poranopsis sinensis
+ Outer 3 sepals ovate to elliptic-oblong; fruit uniformly puberulent.   (5)
5 (4) Sepals ± shiny, glabrous adaxially; fruit trichomes simple, septate   1 Poranopsis discifera
+ Sepals opaque, puberulent adaxially; fruit trichomes 2-armed   2 Poranopsis paniculata

Lower Taxa


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