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FOC | Family List | FOC Vol. 12 | Sterculiaceae

14. Eriolaena Candolle, Mém. Mus. Hist. Nat. 10: 102. 1823.

火绳树属 huo sheng shu shu

Wallichia Candolle (1823), not Roxburgh (1820), nor Reinwardt (1823).

Trees or shrubs, sometimes [?always] deciduous. Stipule linear, caducous; leaf blade mostly ± cordate, rarely obscurely palmately lobed, or oblong and entire, stellate hairy, abaxially mostly densely so, sometimes nearly glabrous, margin ± dentate. Inflorescence racemose, axillary or terminal, often 1-2-flowered, less often many-flowered. Epicalyx lobes 3-5, dentate or divided, rarely entire, falling at anthesis. Sepals 4 or 5, valvate, linear, apex acute, abaxially stellate hairy, adaxially villous. Petals 4 or 5, yellow or white, base tapering into flat villous claw, claw sharply recurved into S-bend with limb radially spreading. Stamens many, connate into monadelphous tube; filaments partly free; anthers linear-oblong, 2-celled, cells parallel; staminodes absent. Ovary sessile, 4-10-celled, tomentose; ovules many in each locule; style linear; stigma 4-10-lobed. Capsule woody or nearly woody, ovoid or narrowly ovoid, dehiscence loculicidal, valves 4-10, adaxial margin densely woolly. Seeds winged, wing membranous, as long as seeds; endosperm thin, cotyledons plicate.

About 17 species: tropical and subtropical Asia; six species (one endemic) in China.

Eriolaena is poorly represented in herbaria, and more gatherings, particularly of correlated flowering and fruiting material, are needed to clarify the taxa.

1 Leaf blade abaxially sparsely hairy to glabrescent, epidermis visible between hairs; leaves always present during flowering and fruiting   (2)
+ Leaf blade stellate hairy, denser abaxially, often tomentose; leaves sometimes absent at flowering or fruiting   (3)
2 (1) Leaf blade glabrous or nearly so, veins of young leaves usually slightly pink; inflorescence a terminal, ± flat-topped, many-flowered panicle.   1 E. glabrescens
+ Leaf blade abaxially yellow-brown stellate pubescent; inflorescence an axillary, few-flowered cyme.   6 E. kwangsiensis
3 (1) Material in flower, epicalyx lobes available   (4)
+ Material in fruit, epicalyx lobes lost   (7)
4 (3) Epicalyx lobes 4-6(-10) mm, margins entire or nearly so   (5)
+ Epicalyx lobes 10-15(-20) mm, margins obviously dentate, fimbriate, or pinnatipartite   (6)
5 (4) Pedicel nearly as long as flower; epicalyx lobes linear-lanceolate, ca. 4 mm; flowers mostly 4-merous, rarely 5-merous.   2 E. spectabilis
+ Pedicel shorter than flower; epicalyx lobes ovate or elliptic-ovate; flowers 5-merous.   3 E. quinquelocularis
6 (4) Epicalyx lobe margin densely fimbriate, densely woolly stellate pilose.   4 E. wallichii
+ Epicalyx lobe margin dentate or pinnatipartite, shortly tomentose.   5 E. candollei
7 (3) Capsule distinctly angular   (8)
+ Capsule rounded, smooth or longitudinally striate, not grooved between valves   (9)
8 (7) Capsule 4-locular, angles scarcely verrucose, flat between ridges and nearly square in cross section.   2 E. spectabilis
+ Capsule 5-locular, angles strongly verrucose, grooved between ridges.   4 E. wallichii
9 (7) Fruiting without leaves.   3 E. quinquelocularis
+ Fruiting with leaves.   5 E. candollei

Lower Taxa


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