Leguminosae 573 



long, 8 mm. wide. July-Aug. Thickets in lowlands; Hon- Makino Hime-fuji, Mekura-fuji. A non-flowering culti- 



shu (centr. distr. and westw.), Shikoku, Kyushu; rather com- var, slightly pilose, with rather densely leafy branches and nar- 

 mon, Cv. Microphylla. M. japonica var. microphylla rower leaflets than in the typical phase. 



37. ROBINIA L. Hari-enju Zoku 



Shrubs or trees, often spiny; leaves odd-pinnate, the stipules spinelike or subulate, the leaflets entire, often stipellate; racemes 

 axillary, pendulous; flowers showy, white or reddish purple, the bracts membranous, caducous; calyx-teeth short; standard re- 

 fle.xed, scarcely longer than the wing and keel; stamens diadelphous; legumes broadly linear, flat, narrowly winged on upper 

 margin, 2-valved, dehiscent, several-seeded. About 20 species, in N. and Centr. America. 



1. Robinia pseudoacacia L. Pseudacacia odorata Mo- pendulous, 10-15 cm. long; flowers showy, white, fragrant, 



cnch Hari-enju, Nise-akashiya. Slightly pubescent to 18-20 mm. long; lowest calyx-teeth lanceolate, die others 



glabrate usually spiny tree; stipules often spiny, the leaflets 9- triangular; legumes glabrous, about 8 cm. long, 12-15 mm. 



19, membranous, oblong, 2-5 cm. long, 1-2.5 cm. wide, wide. May-June. Culdvated and sometimes naturalized. 



rounded at apex, obtuse at base, glaucescent beneath; racemes Introduced from the United States. 



38. LOTUS L. MiYAKOGusA Zoku 



Herbs or shrubs; leaves odd-pinnate, die stipules minute or absent, the leaflets 5-7, entire, the upper 3 usually at the top of 

 the rachis, the lower 2 basal and simulating the stipules; flowers yellow or white, sometimes reddish, in axillary umbellike 

 racemes, usually widiout bracts and bracteoles; calyx 5-toothed; standard ovate to rounded, the keel incurved; stamens 

 diadelphous; ovary sessile, the style glabrous, the ovules many; legumes sessile, usually linear, compressed or somewhat terete, 

 the seeds several. About 150 species, widespread in the temperate and warmer regions. 



1. Lotus corniculatus L. var. japonicus Kegel. L. pedicelled, about 15 mm. long, yellow; calyx 6-7 mm. long, 



japonicus (Kegel) K. Larsen Miyakogusa. Perennial, the lobes hnear-lanceolate, longer than the tube. Apr.- 



glabrous, prostrate herb with slender stems; leaflets obovate, June. Fields and waste grounds; Hokkaido, Honshu, Shi- 



7-10 mm. long, slighdy glaucescent, rounded with a mucro at koku, Kyushu; common. Forma versicolor (Makino) 



apex, the lowest pair subacute, the rachis 2-10 mm. long; Makino. L. corniculatus var. versicolor Makino Nishiki- 



racemes umbellike, long-peduncled, with a ternate involucral miyakogusa. Flowers yellow at first, changing to reddish, 



bract smaller than but similar to the leaves; flowers 1-3, short- The typical phase occurs in Europe and Asia. 



39. ASTRAGALUS L. Genge Zoku 



Herbs or shrubs; leaves odd-pinnate, stipules often adnate to the base of the petiole, sometimes connate at the back, the leaflets 

 entire, exstipellate; racemes on axillary or sometimes scapelike radical peduncles; flowers purple or yellowish, the bracts fre- 

 quently small, membranous, the bracteoles minute or absent; calyx short-tubular, the teeth nearly equal; standard narrow, 

 equaling to exceeding the wing and obtuse keel; stamens diadelphous; ovules many; legumes usually membranous, turgid, 



sometimes apparendy 2-locular by intrusion of the suture. About 1,500 species, in all temperate and cooler regions, except 



Australia. 



lA. Flowers purple, rarely white; legumes apparently 2-Iocular. 



2A. Flowers in umbellike racemes; legumes broadly linear; bracts minute; standard as long as the keel; slender biennial herb of culti- 

 vated fields with elongate peduncles longer than the leaves \. A. sinicus 



2B. Flowers in more or less elongate racemes; legumes oblong; bracts prominent; standard longer than the other petals. 



3A. Stipules connate on the inner margin; flowers 10-20, 12-15 mm. long; bracts 3-5 mm. long, less than 1 mm. wide, 1-nerved; 



legumes sessile, not inflated 2. A. adsurgens 



3B. Stipules free; flowers 5-10, rather large, 2-2.5 cm. long; bracts 7-10 mm. long, 2.5-3 mm. wide, few-nerved; legumes stiped, 

 much inflated. 



'lA. Flowers about 2.5 cm. long; standard obovate i. A. yamamotoi 



4B. Flowers about 2 cm. long; standard oblong 4. A. japonicus 



IB. Flowers yellow or greenish yellow. 



5A. Legumes linear or lanceolate, 2-5 cm. long, 3.5-6 mm. wide, apparendy 2-locular; calyx-teeth linear, the lowest about 3 mm. 

 long, about half to nearly as long as the tube. 

 6A. Leaflets 13-19; racemes 2-3 cm. long; bracts very small, 1-2 mm. long, much shorter than the calyx; legumes bro.idly linear, 



erect, 3.5-4.5 cm. long 5. .-/. reflexistipultis 



6B. Leaflets 25-31; racemes very short, very densely flowered, about 1 cm. long; bracts lanceolate, about as long as the calyx; legumes 



lanceolate, spreading, gradually curved upward, 2-3.5 cm. long 6. //. sikokianiis 



5B. Legumes elliptic or oblong, usually 1-locular; calyx-teeth short, usually triangular, much shorter than the calyx-tube. 



7A. Legumes with a broad groove on back, reniform in cross section, about 13 mm. long, nearly sessile; flowers 12-14 mm. long; 



leaflets 10-15 mm. long, 4-6 mm. wide 7. A. shirotimensis 



7B. Legumes inflated, without a groove on b.ick, oblong or lanceolate in cross section, about 3-5 cm. long, stipilate; flowers 15-20 

 mm. long; leaflets 15-30 mm. long, 5-20 mm. wide. 



8A. Bracts linear, 3-5 mm. long, about 1 mm. wide; leaflets 17-21; legumes much-inflated 8.-4. shinartensis 



8B. Bracts narrowly oblong, 5-10 mm. long, 2-4 mm. wide; leaflets 9-1 1 ; legumes only slightly inflated 9. A. secundtis 



