Leguminosae 569 



rettisa Walp.; D. repens L.; V. repens (L.) O. Kuntze, non ovate, acute, about 0.8 mm. long; calyx 2.5-3 mm. long, nearly 



Baker Hama-azuki. Trailing perennial; stems slender, glabrous, the teeth depressed-triangular, minutely ciliolate; 



sparsely appressed retrorse-pilose while young, soon glabrous; legumes broadly linear, spreading, 3-5 cm. long, nearly or 



stipules narrowly ovate, 2-4 mm. long, rather acute, basifixed, quite glabrous, 5- or 6-seeded, slightly inflated over the seeds. 



obscurely few-nerved; leaflets sparsely pilose only while young, Apr.-Nov. Gravelly slopes near seashores; Kyushu 



ovate or nearly obovate, 3-5 cm. long, 2.5-3.5 cm. broad, the (Yakushima) ; rare. Ryukyus, Formosa, China, and tropi- 



sripels narrowly ovate, acute, about 1 mm. long; racemes 1-2 cal regions, 

 cm. long, few-flowered, peduncled, the bracteoles minute, 



26. APIOS Moench. Hodo-imo Zoku 



Twining perennials; leaves petioled, pinnately compound, the stipules small, subulate, the leaflets 3-7, entire, the stipels 

 linear or obsolete; flowers greenish yellow or purplish brown, in pairs or in 3's or 4's at each node of the axillary racemes, the 

 bracteoles small, caducous; calyx campanulate, sometimes 2-lipped, the teeth obsolete; standard very broad, reflexed, the keel 

 elongate, spirally coiled; stamens diadelphous; legumes broadly linear, 2-valved, dehiscent, straight or slightly curved, rather 

 thick, many-seeded. Few species in N. America, e. Asia, and India. 



1. Apios fortune! Maxim. Hodo-imo. Tuberous- thickened nodes, the pedicels jointed at apex, the bracts 

 rooted twining perennial; stems slender, 100-150 cm. long, broadly hnear, 1.5-2 mm. long, the bracteoles lanceolate, 

 widi scattered retrorsely appressed short hairs, soon glabrous; acute, about 1 mm. long, caducous; flowers pale greenish 

 leaves petioled, the stipules broadly linear, 3-4 mm. long, yellow, recurved, rather small; calyx with undulate obsolete 

 1 -ribbed, deciduous, the leaflets 3 or 5, sparsely appressed- teeth; legumes about 5 cm. long. July-Aug. Sunny thick- 

 hispid on upper side, paler and nearly glabrous beneath, the ets and forest-borders; Hokkaido, Honshu, Shikoku, Kyushu. 



terminal ovate, acurrunate with an obtuse tip, 5-8 cm. long, China. 



2.5-4 cm. wide; racemes 8-15 cm. long, peduncled, with 



27. DUMASIA DC. No-sasage Zoku 



Twining herbs; leaves pinnately 3-foliolate, stipulate and stipellate; flowers pale yellow, solitary or in pairs at the nodes of 

 axillary racemes, sometimes cleistogamous, the bracts narrow; calyx tubulose, oblique at truncate moutii, with 5 mucronate 



teeth; legumes sessile, broadly linear, 2-valved, dehiscent, inflated over the seeds. Few species, in e. Asia, India, and N. 



America. 



1. Dumasia truncata Sieb. & Zucc. No-sas.\ce. Coty- stipels subulate, about 1 mm. long; racemes peduncled, rather 



ledons hypogeal; rhizomes slender, creeping, elongate; stems many-flowered, 2-5 cm. long, sometimes solitary or in pairs in 



slender, nearly glabrous or retrorsely appressed-pubescent axils; flowers 15-20 mm. long; calyx tubular, glabrescent, 



while young; stipules broadly linear, 3-nerved, 3^ mm. long, obliquely truncate at apex; legumes 3- to 5-seeded, oblanceo- 



acute, the leaflets thin, glabrous above, whitish and loosely late, terete, 4-5 cm. long, 7-8 mm. across, glabrous, inflated 



appressed short-pilose beneath, the terminal leaflet narrowly over the seeds. Aug.-Sept. Thickets and forest borders; 



ovate, 6-10 cm. long, i-A cm. wide, obtuse to subacute, the Honshu, Kyushu. 



28. MUCUNA Adans. Tobi-kazura Zoku 



Scandent, rarely erect, woody plants often with brownish stinging hairs; stipules present; leaflets petioled, pinnately 3-foliolate, 

 usually stipellate; flowers in racemes, showy, purple or greenish yellow, pedicelled, usually in pairs, the racemes often cauline or 

 on defoliated older branches, the bracts minute or caducous; calyx-tube short, the upper 2 teeth connate, the lowest longer than 

 the others; standard short, the keel equal to or longer than the wing, beaked, incurved and cartilaginous above; stamens 

 diadelphous, the anthers of 2 forms, the glabrous and basifixed ones alternate with the bearded versatile ones; ovary sessile; 



style filiform, the stigma terminal; legumes thick, ovate to linear, costate to winged. About 30 species, widespread in the 



Tropics. 



lA. Standard glabrous on margin; leaflets with prominent, finely reticulate elevated veinlets on both surfaces, appressed whitish pilose 

 while young; lateral leaflets semicordate on the outer side at base; legumes about 40 cm. long I. M. scmpcrvirens 



IB. Standard ciliate; leaflets with less prominent barely elevated reticulate veinlets beneath, with appressed rusty strigose hairs especially 

 beneath while young; lateral leaflets scmirounded to truncate, rarely shallowly semicordate on the outer margin at base; legumes 

 about 20 cm. long, 5-seeded, scarcely constricted 2. M. irukanda 



1. Mucuna sempervirens Hemsl. M. japonica Nakai leaflet oblong to elliptic, 7-15 cm. long, 4-8 cm. wide, acumi- 



Aira-tobi-kazura. Evergreen climber with woody nate to acute with a mucro at apex, obtuse at base; racemes 



stem, the branchlets glabrous, but with scattered pale yellow 3- to 20-flowered, on peduncles 3.5-6.5 cm. long, fuscous- 



appressed hairs while very young; leaves petioled, the leaflets velvety, witii sparse stinging hairs; calyx densely fuscous- 



3, deep green, lustrous, glabrous, but with scattered white velvety and with sparse stinging hairs; petals dark purple, 



appressed-hairs while young, with raised finely reticulate the keel 6-8 cm. long, incurved and acutely acuminate; 



veinlets with a free veinlet within the network, the terminal legumes about 40 cm. long, 7-seeded, velvety-puberulent, 



