Leguminosae 



567 



linear-lanceolate, 6-10 cm. long, 4-7 mm. wide, with nearly 

 parallel nerves, the tendrils nearly always simple; racemes on 

 peduncles 10-15 cm. long, 5- to 8-flowered; flowers 15-20 mm. 

 long, purple, the lowest calyx-tooth lanceolate, nearly as long 



as the tube. May-June. Wet grassy places and thickets 



along rivers in lowlands; Honshu, Kyushu. Korea, Man- 

 churia, China, and e. Siberia. 



5. Lath>Tus palustris L. var. pilosus (Cham.) Ledeb. 

 L. pilosus Cham.; L. palustris subsp. pilosus var. macranthus 

 (C. T. White) Fern.; L. myrtijolius subsp. macranthus C. T. 

 White; L. ugoensis Matsum.; L. miyabei Matsum.; L. pilosus 

 \ar. miyabei (Matsum.) Hara; L. palustris subsp. pilosus var. 

 macranthus forma miyabei (Matsum.) Hara Ezo-no-renri- 



so. Perennial herb pubescent while young; stems slender, 

 ascending or decumbent at base, 40-80 cm. long, 3-angled, usu- 

 ally with a wing 0.5-2 mm. wide on 2 angles or nearly wing- 

 less; leaves short-petioled, the stipules lanceolate to narrowly 

 ovate, bifid, the leaflets rather membranous, lanceolate to nar- 

 rowly oblong, 3-5 cm. long, 8-15 mm. wide, pale green to glau- 

 cous and usually pubescent beneath, glabrous above, the ten- 

 drils 2- or 3-branched; flowers very similar to those of the 

 preceding; legumes linear-oblong, flat, 4-5 cm. long, 7-8 mm. 



wide, glabrous. May-Aug. Wet grassy places in lowlands; 



Hokkaido, Honshu, Kyushu (Tsushima). Sakhalin, Ku- 



riles, Korea, and widely distributed in the N. Hemisphere. 



22. DUNBARIA Wight & Arn. No-azuki Zoku 



Scandent or twining herbs with scattered sessile glands especially on leaves beneath; stipules deciduous; leaves pinnately 

 3-foliolate, exstipellate; flowers yellowish, in axillary racemes, solitary or in pairs on nodes, the bracts caducous, the bracteoles 

 absent, sometimes minute; calyx-teeth unequal, elongate, the upper 2 connate; legumes broadly linear, flat, 2-valved, dehiscent. 

 Few species in tropical Asia. 



1. Dunbaria villosa (Thunb.) Makino. Glycine villosa 

 Thunb.; D. subrhombea (Miq.) Hemsl.; AtyJosia subrhombea 



Miq. No-AZUKi, Hime-kuzu. Prominendy soft-pubescent, 



twining perennial; stems slender, with spreading or reflexed 

 pubescence; stipules narrowly ovate-triangular, acute, about 2 

 nrim. long, recur\'ed, pubescent; leaflets rather densely short 

 ascending-pubescent, with reddish brown, sessile, discoid 

 glands beneath, the terminal leaflet rather larger than the 

 lateral ones, depressed-rhombic, abruptly acute with an obtuse 

 tip, 2-3 cm. long and as wide, stipels minute; racemes axil- 

 lary, short-peduncled, loosely 3- to 8-flowered; flowers solitary 



on each node of the raceme, 15-18 mm. across, yellow, the 

 pedicels 6-8 mm. long; calyx about 10 mm. long, densely 

 glandular-dotted and short-puberulent, sometimes loosely 

 pilose, the lowest tooth longest, lanceolate, slightly longer 

 than the tube; standard orbicular, short-clawed, with an obtuse 

 tubercle on each side at base of limb, the keel semicircular and 

 curved to the right, not spurred; legumes flat, broadly linear, 

 4.5-5 cm. long, about 8 mm. wide, short-pubescent, 6- or 7- 



seeded. Aug.-Sept. Honshu (Kanto Distr. and westw.), 



Shikoku, Kyushu. centr. China. 



23. RHYNCHOSIA Lour. 



Tankiri-mame Zoku 



Twining to procumbent herb with scattered, yellowish brown, sessile, discoid glands; leaves pinnately 3-foliolate, stipellate, the 

 stipules ovate or lanceolate; racemes axillary, the yellow flowers solitary or in pairs at each node, the bracts caducous; calyx 

 5-lobed; legumes flat, elliptic, 2-valved, dehiscent, 2-seeded. About 100 species in Tropics. 



lA. Terminal leaflet obovate, rounded at apex; lowest calyx-lobe longer than the tube 1. R. volubilis 



IB. Terminal leaflet ovate, short-acuminate at apex; all calyx-lobes shorter than the tube 2. R. acuminatijolia 



1. Rhynchosia volubilis Lour. Tankiri-mame. Twin- 

 ing grayish green perennial; stems rather slender, densely re- 

 curved short-pubescent; leaves petioled, the stipules narrowly 

 ovate, acuminate, 4-5 mm. long, brown, several-nerved, the 

 leaflets herbaceous, with sessile, yellowish brown, discoid 

 glands on under side, dull yellow-villous, the terminal leaflet 

 obovate or broadly so, 3-5 cm. long, 2.5-4 cm. wide, the stipels 

 filiform, 2-3 mm. long; racemes nearly sessile, 10- to 20-flow- 

 ered, 2-4 cm. long, the bracts elliptic, mucronate, caducous, 

 brownish, 4-6 mm. long; flowers yellow, 8-10 mm. across; 

 calyx densely puberulent, glandular, 6-8 mm. long, the lower 

 3 lobes lanceolate, acuminate; legumes elliptic, flat, slightly 

 inflated above the seeds, slightly constricted between the seeds, 



12-13 mm. long, about 8 mm. wide, puberulent, rarely gla- 

 brous except the margin, reddish when mature. July-Sept. 



Thickets in hills and lowlands; Honshu (Kanto Distr. and 



wesrvv.), Shikoku, Kyushu; rather common. Korea, China, 



Ryukyus, Formosa, and Philippines. 

 2. Rhynchosia acuminatifolia Makino. R. volubilis 



var. acuminata Maxim. Oba-tankiri-mame, Tokiri-mame. 



Closely resembles the preceding, but vivid green and more 

 slender, less densely pubescent: leaves thinner, the terminal 

 leaflets ovate to narrowly so, 4-8 cm. long, 3-5 cm. wide; 

 bracts 2.5-3.5 mm. long; calyx 4-5 mm. long, the lobes tri- 

 angular; legumes puberulent, 15-17 mm. long, nearly sessile. 

 — — •.'\ug.-Sept. Honshu (centr. distr. and westw.), Kyushu. 



24. AZUKIA Takah. 



AzuKi Zoku 



Twining, rarely erect, more or less pilose annuals or perennials; leaves pinnately 3-foliolate, the stipules peltate, the stipels 

 linear, basifi.xed, the leaflets entire or 2- or 3-lobed; racemes axillary, the bracts similar to the bracteoles, caducous, the bracteoles 

 membranous to herbaceous, the nodes of the raceme prominently thickened; flowers yellow, or slightiy greenish; calyx-teeth 

 short; standard orbicular, short-clawed, the wings oblong, the left one embracing the semicircular curved keel, the right one 

 spreading by the support of the spur on the keel, the keel horizontal and dextrorsely curved, with a horn-shaped spur on the right 



