576 



Leguminosae 



short-creeping on the ground; leaves petioled, 6-10 cm. long, petals, truncately bifid at apex. Hokkaido (Mount Sho- 



the stipules 12-15 mm. long, lanceolate, loosely white-pubes- kanbetsu in Teshio) ; rare. 



cent, 1-nerved, connate on the front at base, adnate to the base 7. Oxytropis rishiriensis Matsum. O. campestris sensu 



of the petiole on lower half on dorsal side, the leaflets 19-26, auct. Japon., non DC. Rishiri-genge. Short-creeping, 



broadly lanceolate to narrowly ovate, 10-15 mm. long, 2.5^ lanate, suffrutescent subshrub; stems 10-15 cm. long; leaflets 



mm. wide, acute, with slighdy involute margins, glabrous on oblong, acute, the stipules adnate to the base of the petioles, 



upper side, appressed-pubescent beneath; peduncles or scapes ovate, acuminate, 1-nerved, pubescent; racemes rather many- 



5-10 cm. long, about 5-flowered, nearly umbellate, the bracts flowered, the bracts lanceolate, much longer than the pedicel; 



broadly linear, about 10 mm. long, 1-1.5 mm. wide, the pedi- flowers about 2 cm. long; calyx tubulose with short teeth; 



eels short; flowers 2-2.3 cm. long, reddish purple; calyx about legumes sessile, acute, nearly glabrous, ascending. Aug. 



12 mm. long, with white and brown hairs, the teeth short, Hokkaido (Mount Rishiri and Mount Yubari) ; rare. 

 1.5-2 mm. long; standard distinctly longer than the other 



41. TRIFOLIUM L. Shajiku-so Zoku 



Annual or perennial herbs; leaves digitately 3- to 7-foliolate, the stipules adnate to the petiole, the leaflets dentate; flowers red, 

 purplish, white, rarely yellow, in axillary peduncled umbels, racemes, or heads, the bracts small or absent, sometimes forming 

 a toothed involucre; calyx-teeth subequal; petals persistent, the wing longer than the keel, the claw adnate to the staminal tube, 

 the keel exposing the stamens; stamens diadelphous; legumes small, oblong, terete, cylindric or obovate and flat, small, usually 

 membranous, indehiscent, few-seeded. About 300 species, in temperate regions of the N. Hemisphere, few in the S. Hemi- 

 sphere. 



lA. Flowers nearly sessile, bractless, 10-12 mm. long, reddish or rarely white; erect or ascending herb with yellowish spreading hairs, 



3-foliolate leaves and sessile terminal heads 1 . T. pratense 



IB. Flowers more or less distinctly pedicelled, with small bracts, white or reddish; heads peduncled. 



2A. Leaflets 4-7, rarely 3; petioles adnate to the stipules throughout their length; flowers deep red, rarely white, 15-18 mm. long; calyx 



10 mm. long; stems erect or ascending from a thick caudex 2. T. hipinaster 



2B. Leaflets 3; petioles adnate to the stipules only on the lower part; flowers 7-8 mm. long; calyx 3-3.5 mm. long. 



3A. Stems erect or ascending; petioles very unequal in length, the lower ones to 30 cm., the upper 1 to 2 cm. long; flowers reddish, 



rarely white 3. T. hybridum 



3B. Stems long-creeping; petioles all elongate, nearly equal in length, usually 8-20 cm. long; flowers usually white 4. T. repens 



1. Trifolium pratense L. Mueasaki-tsdme-kusa, Aka- 3. Trifolium hybridum L. Tachi-oranda-genge. 

 TsuME-KusA. Morc Or less pubescent herb; stems branched. Nearly glabrous perennial; stems 30-50 cm. long, often 

 30-60 cm. long; stipules membranous, appressed, caudate with branched, flexuous; stipules oblong, acuminate; leaflets ovate, 

 a long setaceous tip, green, the leaflets ovate, elliptic, or oblong, 2-3.5 cm. long, 15-23 mm. wide, the petioles elongate; heads 

 3-5 cm. long, often with a lunate band; heads rather large, long-peduncled, axillary, globose, many-flowered; flowers pale 

 globose to ovoid, subtended by a pair of leaves with much- reddish or white; calyx white, campanulate, the teeth subulate, 



dilated stipules at base; calyx-teeth subulate, unequal, not ex- nearly equal, green; legumes 2-seeded. ^May-July. Natu- 



ceeding the corolla. May-June. Naturalized in our area, ralized in our area. Europe, N. Africa, and w. Asia. 



^Europe and N. Africa. 4. Trifolium repens L. Shiro-tsume-kusa, Oranda- 



2. Trifolium lupinaster L. Shajiku-so. Perennial genge. Glabrescent perennial with long-creeping entwined 

 herb with a thickened caudex; stems firm, tufted, erect or and matted branches; leaves radical, long-petioled, the stipules 

 ascending, 20-40 cm. long, usually simple, more or less soft- lanceolate, acuminate, membranous, greenish, the leaflets 3, 

 pubescent, several-leaved; petioles short, the stipules mem- obovate to obovate-orbicular, 15-25 mm. long, 10-25 mm. 

 branous, pale, acuminate; leaflets equal, oblanceolate, rarely wide, emarginate and rounded at apex, green with a white 

 narrowly obovate, 2-4 cm. long, 5-10 mm. wide; heads in band below the middle; peduncles or scapes longer than the 

 upper axils, 10- to 20-flowered, the peduncles pubescent, 0.5-3 leaves; heads many-flowered, globose, the pedicels recurved 

 cm. long; flowers deep red; calyx-lobes subulate, the lowest in fruit; flowers white with a greenish hue, sometimes reddish; 



longer. June-Sept. Grassy slopes and rocky cliffs on vol- legumes 4- to 6-seeded. Apr.-July. Naturalized and very 



canoes and near seashores; Hokkaido, Honshu (centr. distr. common in our area. Europe, n. Africa, and w. Asia. 



and northw.). e. Europe to Asia. 



42. MEDICAGO L. Umagoyashi Zoku 



Herbs; leaves pinnately 3-foliolate, with lateral nerves ending in the teeth, the stipules adnate to the petiole; flowers small, 

 yellow or violet, the bracts small or absent; calyx-teeth 5, nearly equal; keel obtuse, shorter than the wings, spreading and free 

 from the stamens, exposing the anthers; anthers of 1 form; style subulate, glabrous, the stigma nearly capitate; legumes spirally 

 coiled, curved or rarely falcate, often spiny, 1- to several-seeded. About 50 species, in Europe, n. Africa, and w. Asia. 



lA. Perennial herb; flowers violet, about 7 mm. long; legumes soft-pubescent, smooth \. M. sativa 



IB. Annuals or biennials; flowers yellowish, about 3 mm. long. 



2A. Legumes smooth, not spiny, about 2.5 mm. long, 1-seeded; flowers rather many 2. M. lupulina 



25. Legumes spiny, several-seeded; flowers few. 



3A. Glabrescent; stipules with laciniate margins, stems glabrous 3. M. hispida 



3B. Pubescent; stipules entire or with few teeth; stems pubescent 4. M. minima 



