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FOC | Family List | FOC Vol. 16 | Convolvulaceae

4. Erycibe Roxburgh, Pl. Coromandel. 2: 31, t. 159. 1798.

丁公藤属 ding gong teng shu

Stranglers, woody or scandent shrubs. Stems lenticellate, young parts glabrous or reddish tomentose, hairs 2-armed or stellate (or ?simple). Leaves petiolate, entire, leathery or papery. Inflorescences terminal or axillary, racemose or paniculate; bracts early deciduous, usually minute. Flowers small, fragrant. Sepals free, persistent, subequal, leathery, usually pubescent abaxially. Corolla white or yellow, deeply 5-lobed; tube short, glabrous outside; lobes of limb 2-lobulate apically, midpetaline bands densely appressed pubescent outside; lateral lobules rather thin, glabrous, with distinct or indistinct venation. Stamens included; filaments triangular or laterally concave; anthers obtuse or acuminate apically, cordate basally, sometimes truncate to retuse at both ends; pollen not spiny. Ovary globose or ellipsoid, 1-loculed, 4-ovuled. Stigma subsessile, ± conical, with 5-10 longitudinal, straight or spirally twisted ridges. Fruit a slightly fleshy berry. Seed 1.

Approximately 67 species: mainly in tropical Asia, Australia, Japan, and Malesia; ten species in China.

Two accounts of the genus established the taxonomic concepts adopted here: How (Sunyatsenia 6: 221-230. 1946) provided keys, descriptions, and lists of specimens examined; Hoogland (Blumea 7: 342-361. 1953) nomenclaturally revised the entire genus, including Chinese taxa described up to that time.

1 Branchlets and abaxial surface of leaves ± densely rust colored or brownish pubescent.   (2)
+ Branchlets glabrous or pubescent; leaves glabrous or sparsely pubescent.   (3)
2 (1) Corolla ca. 12 mm, lobules fimbriate; leaves 6.5-18 cm, with 5-9 pairs of lateral veins (Hainan, Guangdong, Guangxi)   1 Erycibe hainanensis
+ Corolla 7.5-9.5 mm, lobules entire; leaves 2.5-9 cm, typically with 3 or 4 pairs of lateral veins (Yunnan)   2 Erycibe expansa
3 (1) Panicles often terminal, rarely axillary; inflorescences often longer than leaves, 5-24 cm.   (4)
+ Panicles or racemes terminal and axillary; axillary inflorescences usually much shorter than leaves, 1.5-11 cm.   (5)
4 (3) Corolla lobules erose-dentate; leaves oblong, lanceolate-oblong, or elliptic, 7-18 cm, abaxially sparsely pubescent with 2-armed hairs or subglabrous, lateral veins 6 or 7 pairs   3 Erycibe subspicata
+ Corolla lobules ± entire or undulate; leaves oblong-lanceolate, 5-9 cm, glabrous, lateral veins 3 or 4 pairs   4 Erycibe myriantha
5 (3) Inflorescences racemose, axillary, few flowered, 1.5-2 cm   5 Erycibe oligantha
+ Inflorescences paniculate or racemose, terminal or axillary, many flowered, 2-11 cm or longer.   (6)
6 (5) Leaf blade papery or rigidly so.   (7)
+ Leaf blade leathery or thickly so.   (8)
7 (6) Leaf blade elliptic or oblong-elliptic; corolla lobules oblong-ovate, margin crenulate; ovary globose   9 Erycibe sinii
+ Leaf blade broadly elliptic; corolla lobules oblong-elliptic, margin entire or undulate; ovary columnar   10 Erycibe henryi
8 (6) Leaf blade elliptic or obovate, 6.9-9 cm, apex obtuse, acute, or short acuminate; corolla lobules undulate   8 Erycibe obtusifolia
+ Leaf blade ovate-elliptic or oblong-elliptic, 7-15 cm, apex ± abruptly acuminate; corolla lobules erose.   (9)
9 (8) Fruit ellipsoid; corolla lobules obovate to subcuneate; leaves usually with 5-7 pairs of lateral veins   6 Erycibe elliptilimba
+ Fruit subglobose; corolla lobules obcordate; leaves usually with (7 or) 8(-10) pairs of lateral veins   7 Erycibe schmidtii

Lower Taxa


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