566 



Leguminosae 



15. Vicia venosa (Willd.) Maxim, var. cuspidata 

 Maxim. V. sexajuga Nakai; V. deflexa Nakai; V. senanensis 

 Nakai; V. subcuspiiata (Nakai) Nakai; V. venosa var. sub- 



cuspidata Nakai Ebira-fuji. Erect, slightly puberulous 



perennial; stems angular and sparsely branched above, 80-100 

 cm. long; leaves short-petioled, the stipules semi-ovate, dentate, 

 or narrow and bifid, the leaflets 8-12, rather thin, lanceolate 

 or narrowly ovate, 2.5-6 cm. long, 8-10 mm. wide, long-acumi- 

 nate, the tendrils reduced to spines; racemes 2-4 cm. long, 

 rather short-peduncled, one-sided, several to many-flowered; 

 flowers 12-15 mm. long, bluish purple, the bracts inconspicu- 

 ous; calyx-teeth short. May-Sept. Woods; Honshu (centr. 



distr. and westw.), Kyushu (rare). Forma minor (Nakai) 



Ohwi. V. venosa var. minor Nakai. With smaller ovate leaf- 

 lets 10-25 mm. long, 8-15 mm. wide, acute. Honshu (Chu- 



goku Distr.) and Kyushu. Intermediates often occur between 



the typical phase and var. cuspidata. ^The typical phase 



occurs in e. Siberia, Manchuria, and Korea. 



16. Vicia fauriei Franch. V. venosa var. fauriei 

 (Franch.) Okuyama; V. fauriei var. subsessilis Nakai Tsu- 



GARU-Fuji. Erect, slightly pubescent perennial herb; stems 

 angular, 60-80 cm. long, often branched above; leaves very 

 short-petioled, the stipules obliquely ovate or semi-ovate, 

 dentate, the leaflets 4-8, thinly chartaceous, ovate to broadly 

 lanceolate, 4-10 cm. long, 2-3 cm. wide, long-acuminate or 

 very acute, with reticulate veinlets especially prominent be- 

 neath; racemes densely flowered, one-sided, 2-3 cm. long, 

 often branched at base, the peduncles absent or to 6 cm. long, 

 the bracts lanceolate to ovate, green, 5-8 mm. long, acuminate, 

 often serrate; flowers bluish purple, 12-15 mm. long; calyx- 

 teeth short; legumes glabrous. July-Aug. Hokkaido, Hon- 

 shu (Echigo Distr. and northw.). — —China. 



17. Vicia bifolia Nakai. V. unijuga var. bracteata Fr. & 

 Sav.; V. bracteata (Fr. & Sav.) Koidz.; V. fauriei var. unijuga 



Matsum. Miyama-tani-watashi. Resembling V. unijuga, 



but the bracts narrowly ovate to lanceolate, acuminate, some- 

 times toothed, 3-8 mm. long; leaves thinner, the leaflets 



acuminate. June-Aug. Mountains; Honshu (centr. distr.); 



rather rare. Korea. 



21. LATHYRUS L. Renri-so Zoku 



Erect or scandent herbs; leaves even-pinnate, the stipules often leaflike, sagittate, the rachis often ending in a tendril, the 

 leaflets 2 to few, entire, rarely reduced; flowers usually showy, reddish purple, sometimes yellowish, in axillary racemes, the 

 bracts minute, the bracteoles absent; wings nearly or completely free from the keel; stamens diadelphous (9 and 1), or some- 

 times monadelphous, the tube of the filaments scarcely oblique at apex; legumes flat, 2-valved, dehiscent, several to many-seeded. 

 ^About 100 species, in the temperate and cooler regions of the N. Hemisphere and S. America. 



lA. Stems wingless, angular or ribbed. 



2A. Leaflets 2; flowers clear yellow 1. L. pratensis 



2B. leaflets 4-8, rarely 10. 



3A. Flowers many, yellow, changing to brown; calyx-teeth depressed-deltoid, much shorter than the tube; legumes 8-10 cm. long. 



2. L. davidii 

 3B. Flowers 3-6, purple; calyx-teeth (at least the lowest) as long as to longer than the tube; legumes 5-6 cm. long. . . 3. L. maritimus 

 IB. Stems winged. 



4A. Stems erect; tendrils simple; leaflets rather coriaceous, with raised veinlets on both sides 4. L. quinquenervius 



4B. Stems often decumbent; tendrils usually branched; leaflets rather membranous, with raised veinlets only on the under side. 



5. L. palustris var. pilosus 



1. Lathyrus pratensis L. Kibana-no-renri-so. Loosely 

 pubescent to glabrous, rather slender perennial herb 50-100 

 cm. high; stems angular; stipules narrowly ovate, broadly 

 lanceolate or semisagittate, acuminate, 15-30 mm. long; leaf- 

 lets 2, oblong, subacute, 15-35 mm. long, 5-10 mm. wide, 

 with palmate, nearly parallel nerves, the tendrils branched; 

 racemes long-peduncled, 5- to lO-flowered, the bracts minute; 

 flowers clear yellow, 15-20 mm. long; calyx-teeth rather equal, 

 elongate-deltoid, as long as or slightly shorter than the tube; 

 legumes broadly linear, 3-4 cm. long, about 6 mm. wide, gla- 

 brous. Sparingly naturahzed; Honshu (Mount Ibuki in 



Oomi Prov.). Europe and nw. Asia. 



2. Lathyrus davidii Hance. Itachi-sasage. Nearly 

 glabrous perennial herb; stems 80-120 cm. long, striate or 

 obtusely angled in the upper part; leaves short-petioled, the 

 stipules semisagittate, sometimes dentate, 15-30 mm. long, the 

 leaflets 4-8, membranous, ovate or elUptic, obtuse, 3-8 cm. 

 long, 2-4 cm. wide, nearly penninerved, glaucous beneath, the 

 tendrils 2- or 3-branched; racemes many-flowered, 5-15 cm. 

 long, on peduncles 5-10 cm. long; flowers yellow, changing 

 to brown, 15-18 mm. long, suddenly curved upward near the 

 middle; calyx-teeth depressed-triangular; legumes linear, flat, 

 8-10 cm. long, 5-6 mm. wide, glabrous, many-seeded. 



July-Aug. Woods and thickets in mountains; Hokkaido, 



Honshu (centr. distr. and northw.), Kyushu. n. China, 



Manchuria, Ussuri, and Korea. 



3. Lathyrus maritimus (L.) Bigel. Pisum maritimum 

 L.; L. japonicus Willd. Hama-endo. Glabrous to soft- 

 pubescent, glaucous perennial; stems 20-60 cm. long, angular, 

 ascending from long-creeping, slender rhizomes; leaves short- 

 petioled, the stipules obliquely ovate or semisagittate, 15-25 

 mm. long, very acute, the leaflets 8-12, ovate to oblong or 

 elliptic, 15-30 mm. long, 10-20 mm. wide, acute to obtuse, 

 nearly penninerved, the tendrils simple or 2- or 3-branched; 

 racemes long-peduncled; flowers 25-30 mm. long, purple, 

 rarely white; calyx-teeth lanceolate, the lower as long as to 

 slightly longer than the tube; legumes narrowly oblong, about 



5 cm. long, 1 cm. wide, glabrous, several-seeded. Apr.- 



July. Sand dunes near seashores; Hokkaido, Honshu, Shi- 

 koku, Kyushu; common. Throughout the N. Hemisphere. 



4. Lathyrus quinquenervius (Miq.) Litv. Vicia quin- 



quenervia Miq.; L. palustris var. sericea Franch. Renri-so. 



Perennial herb short-pubescent while young; stems erect, 40- 

 80 cm. long, 3-angled, the wings 1-2 mm. wide; leaves peti- 

 oled, the stipules lanceolate, bifid, caudately long-acuminate, 

 10-25 mm. long, 1-3 mm. wide, the leaflets 2-6, linear to 



