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45. Leptomischus Drake, Bull. Mus. Hist. Nat. (Paris). 1: 117. 1895.

报春茜属 bao chun qian shu

Authors: Tao Chen & Charlotte M. Taylor

Indopolysolenia Bennet; Polysolen Rauschert, nom. illeg. superfl.; Polysolenia J. D. Hooker (1873), not Ehrenberg ex Kützing (1849) [Fungi].

Perennial herbs or subshrubs, unarmed, presumably rather succulent. Raphides present. Leaves opposite, sometimes crowded or rosulate, perhaps without domatia, with margins sometimes crisped and/or reportedly serrulate; stipules persistent to deciduous, interpetiolar or shortly united around stem, triangular to suborbicular (Leptomischus funingensis), often well developed and veined, entire or 2- or 3-lobed (L. wallichii), glabrous or glabrescent adaxially. Inflorescences terminal and apparently sometimes pseudoaxillary, capitate to congested-cymose or umbelliform, several to many flowered, subsessile to pedunculate, bracteate with bracts often well developed to involucral. Flowers sessile to pedicellate, bisexual, distylous and sometimes markedly dimorphic. Calyx limb 5-lobed. Corolla white or yellow, funnelform, salverform, or sometimes inflated, inside pubescent in upper part or most of tube; lobes 5, valvate in bud. Stamens 5, inserted below middle of corolla tube in long-styled flowers, inserted in corolla throat in short-styled flowers, included or partially exserted; filaments usually short; anthers basifixed or perhaps dorsifixed near base. Ovary 2-celled, ovules numerous in each cell borne on stipitate placentas apparently near base of septum; stigma 2-lobed, included or exserted. Fruit capsular, subglobose, dehiscent through apical portion or operculum inside calyx limb, perhaps papery, with septum reportedly mostly disintegrating leaving 1 incomplete cell; seeds numerous, small, reticulate or areolate.

Seven species: S China, NE India, Myanmar, Vietnam; five species (three endemic) in China.

Leptomischus seems to be similar to Keenania and Mouretia; all of these genera are rather poorly known. Several authors (e.g., Deb & Rout, Kew Bull. 45(2): 339-341. 1990; H. S. Lo in FRPS 71(1): 184-189. 1999) have reported marked floral dimorphism in species of Leptomischus.

1 Leaf blade shallowly cordate or subtruncate at base; stems well developed with leaves distributed along them; calyx with multicellular long trichomes.   3 L. guangxiensis
+ Leaf blade obtuse to acute at base; stems short to well developed with leaves distributed along them or congested at ends; calyx glabrous or with unicellular or multicellular trichomes   (2)
2 (1) Flowers smaller, corolla 6-6.5 mm; calyx and corolla glabrous outside.   4 L. parviflorus
+ Flowers larger, corolla longer than 10 mm; calyx and corolla glabrous to variously pubescent outside   (3)
3 (2) Stems short, with leaves crowded and rosulate; calyx and corolla unicellular pilosulous outside.   5 L. primuloides
+ Stems developed, with leaves distributed along them; calyx and corolla densely multicellular villous, -tomentose, or -pilosulous outside   (4)
4 (3) Stipules ovate to lanceolate, 8-9 mm.   1 L. erianthus
+ Stipules suborbicular, 4-5 mm.   2 L. funingensis

Lower Taxa


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