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FOC | Family List | FOC Vol. 23 | Arecaceae

9. Rhapis Linnaeus f. ex Aiton, Hortus Kew. 3: 473. 1789.

棕竹属 zong zhu shu

Stems slender, clustered, spreading by rhizomes to form small to large clumps, covered, especially in upper part, with fibrous, persistent leaf bases, otherwise green. Leaves 12-22, palmate; leaf sheaths fibrous, consisting of 2 layers of fibers, forming a square or diagonal mesh, with fibrous ligules at apices; hastula present; segments few to many, split to 1/2 or more their length, with minute spines along margins. Plants dioecious. Inflorescences branched to 3 orders, borne among leaves, covered with persistent bracts, these closely or loosely sheathing, bearing either all male or all female flowers, occasionally bisexual; flowers simple in structure, borne singly, male flowers with 6 stamens. Fruits variously colored, small, globose to ellipsoid or ovoid, usually 1-seeded, sometimes borne on short stalks; endosperm homogeneous; germination remote; eophylls undivided.

Eleven species: China, Indonesia (Sumatra), Laos, Thailand, Vietnam; five species (two endemic) in China.

1 Leaf blade segments with ± straight sides and jagged apices.   1 R. excelsa
+ Leaf blade segments with curved sides and ± pointed apices   (2)
2 (1) Leaf blades split to base, or at least some segments split to base.   2 R. gracilis
+ Leaf blades not split to base   (3)
3 (2) Leaf blades divided into 3-6 segments.   3 R. robusta
+ Leaf blades divided into 5-23 segments   (4)
4 (3) Leaf sheaths with coarse, black or brown fibers producing a diagonal mesh; fruits borne on short (ca. 5 mm) stalks.   4 R. multifida
+ Leaf sheaths with narrow, brown fibers producing a square mesh; fruits not borne on short stalks.   5 R. humilis

Lower Taxa


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