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FOC | Family List | FOC Vol. 11 | Euphorbiaceae

2. Leptopus Decaisne in Jacquemont, Voy. Inde. 4(Bot.): 155. 1835.

雀舌木属 que she mu shu

Authors: Bingtao Li & Maria Vorontsova

Andrachne [unranked] Arachne Endlicher; Arachne (Endlicher) Pojarkova; Archileptopus P. T. Li; Thelypetalum Gagnepain.

Herbs to shrubs, monoecious; indumentum of simple hairs, sometimes absent. Leaves alternate, petiolate; stipules small, usually membranous, glabrous or ciliate, persistent; leaf blade simple, membranous to leathery, margin entire, venation pinnate. Inflorescences axillary, 1-flowered or fascicled, male flowers sometimes on short densely bracteate inflorescences. Male flowers: pedicels usually filiform; sepals 5(or 6), free or connate at base, imbricate; petals 5(or 6), usually shorter than sepals, mostly membranous; disk with 5(or 6) contiguous regular segments bilobed for 1/3-4/5 of their length; stamens 5(or 6), opposite sepals; filaments free; anthers introrse or extrorse, longitudinally dehiscent; pistillode composed of 3 free segments or 3-lobed. Female flowers: pedicels apically dilated; sepals larger than male; petals membranous, minute and often hidden under disk lobes; disk annular, regularly divided into 5(or 6) emarginate segments; ovary 3-6-locular; ovules 2 per locule; styles 3-6, apex bifid to base or nearly so, recurved; stigmas apically dilated to capitate. Fruit a capsule, dehiscent into 3(-6) 2-valved cocci when mature, smooth, sometimes with faint reticulate venation. Seeds without caruncle, rounded triquetrous to almost reniform, smooth, rugose or pitted, dull; endosperm fleshy; embryo curved; cotyledons flattened and broad.

Nine species: China, India, Indonesia, Malaysia, Myanmar, Pakistan, Philippines, Thailand, Vietnam; SW Asia (Caucasus, Iran); six species (three endemic) in China.

Some authors treated Leptopus as part of a more widely circumscribed Andrachne Linnaeus, but that view is not accepted here (see Vorontsova et al., Amer. J. Bot. 94: 2026-2040. 2007; Vorontsova & Petra Hoffmann, Kew Bull., in press).

Andrachne cavaleriei H. Léveillé (Repert. Spec. Nov. Regni Veg. 12: 187. 1913) is the basionym of Lysimachia capillipes Hemsley var. cavaleriei (H. Léveillé) Handel-Mazzetti in the Primulaceae (see Fl. China 15: 52. 1996). Andrachne millietii H. Léveillé (Bull. Géogr. Bot. 24: 146. 1914) is the basionym of Lysimachia millietii (H. Léveillé) Handel-Mazzetti in the Primulaceae (see Fl. China 15: 50. 1996).

"Arachne Necker" (Elem. Bot. 2: 348. 1790) was not validly published because the work in which it appeared is among the Opera Utique Opressa.

1 Leaves leathery, almost succulent, petioles 2-4 × 0.8-1 mm.   1 L. pachyphyllus
+ Leaves membranous to papery, petioles either longer and/or thinner   (2)
2 (1) Ascendant herbs to subshrubs up to 0.5 m tall; leaf base attenuate to cuneate; plants densely hirsute; female pedicels 2-5 mm in flower, 5-9 mm in mature fruit.   2 L. australis
+ Erect to procumbent shrubs 0.5-4 m tall; leaf base rounded to cuneate; plants glabrous to sparsely hirsute, rarely densely hirsute; female pedicels 5-30 mm in flower, 7-36 mm in mature fruit   (3)
3 (2) Branchlets white or near white; male pedicels less than 2 mm.   3 L. hainanensis
+ Branchlets light green to brown; male pedicels 3-22 mm   (4)
4 (3) Plants ascendant or procumbent, stem flexuous; female flowers predominantly narrowly cupular, female sepals apically acute to acuminate; branches strongly ribbed.   4 L. clarkei
+ Plants erect, stem straight; female flowers rotate, female sepals apically rounded to cuspidate, rarely acute; branches terete to moderately ribbed   (5)
5 (4) Petiole less than 1/10 as long as leaf blade; fruit 4-6-locular; male disk lobes divided for 4/5 of their length.   5 L. fangdingianus
+ Petiole more than 1/10 as long as leaf blade; fruit 3-locular; male disk lobes divided for 1/2-2/3 of their length.   6 L. chinensis

Lower Taxa


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