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FOC | Family List | FOC Vol. 16 | Apocynaceae

38. Urceola Roxburgh, Asiat. Res. 5: 169. 1799.
[nom. cons.]

水壶藤属 shui hu teng shu

Chunechites Tsiang; Ecdysanthera Hooker & Arnott; Parabarium Pierre in Spire; Xylinabariopsis Lý.

Lianas woody, latex white. Leaves opposite. Cymes paniculate, terminal or axillary, 3-branched. Flowers small. Calyx deeply divided, with basal glands inside. Corolla suburceolate, throat without scales; lobes short, overlapping to right. Stamens included, inserted at base of corolla tube; filaments short; anthers narrowly oblong, sagittate, connivent, adherent to pistil head, cells spurred at base; disc ringlike, entire or 5-lobed. Ovaries 2, longer than disc, villous at apex; ovules numerous in each locule. Style short; pistil head ovoid, conical or oblong, apex 2-cleft. Follicles cylindric or narrowly ellipsoid, spreading, thick, acuminate. Seeds numerous, oblong or linear, compressed, pubescent, coma long; endosperm scanty; cotyledons oblong or ovate, leaflike, radicle short.

Fifteen species: SE Asia, eight species in China.

1 Leaf blade pubescent abaxially, denser along veins.   (2)
+ Leaf blade glabrous, sometime with hairy domatia in axils of lateral veins.   (3)
2 (1) Leaf blade very narrowly elliptic, lateral veins 5-7 pairs; corolla glabrous outside, lobe margin 1-toothed; fruit linear or nearly so, ca. 0.5 cm in diam.   1 Urceola xylinabariopsoides
+ Leaf blade ovate or narrowly elliptic, lateral veins ca. 10 pairs; corolla pubescent outside, lobe margin entire; fruit narrowly ovoid, 1.5-2 cm in diam.   2 Urceola huaitingii
3 (1) Petiole puberulent; corolla lobes 1-toothed near base; fruit ovoid   3 Urceola micrantha
+ Petiole glabrous; corolla lobes entire; fruit sublinear or oblong, if ovoid then long beaked.   (4)
4 (3) Leaf blade papillate abaxially, petiole 3-5 mm   4 Urceola quintaretii
+ Leaf blade not papillate abaxially, petiole 6-25 mm.   (5)
5 (4) Leaf blade narrowly oblong, 11-18 cm; fruit ca. 2 cm in diam.   5 Urceola tournieri
+ Leaf blade broadly elliptic, elliptic, or narrowly ovate, 3-10 cm; fruit 0.4-1 cm in diam.   (6)
6 (5) Inflorescences glabrous   8 Urceola linearicarpa
+ Inflorescences pubescent or puberulent.   (7)
7 (6) Sepals ca. 4 mm; corolla lobes ± symmetrical, slightly longer than tube; follicles to 15 cm, terete, not stipitate   6 Urceola rosea
+ Sepals ca. 0.8 mm; corolla lobes strongly asymmetrical, ca. 2 longer than tube; follicles 5-7 cm, strongly stipitate   7 Urceola napeensis

Lower Taxa


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