PEA FAMILY 615 



1. Alhagi camelorum Fisch. Camel Thorn. Fig. 2925. 



Alhagi camelorum Fisch. Hort. Gorenk. ed. 2. 72. 1812. 



Low shrub, 4-8 dm. high, the branches striate, pale green and glabrous, the spines slender, 

 10-25 mm. long. Leaves linear to elliptic-oblong, 8-15 mm. long, tipped with a recurved apicula- 

 tion, glabrous above, strigose beneath, at least when young, and on the short petiole ; raceme 

 rachis 2-3 cm. long, bearing mostly 4-6 flowers ; pedicels slender, 2-3 mm. long ; calyx 2 mm. 

 long, the teeth broadly triangular, very short ; corolla reddish purple, about 8-9 mm. long ; pod 

 distinctly stipitate, torulose, strongly constricted between the few seeds. 



Naturalized from Asia Minor; locally established in Fresno, Imperial, and San Diego Counties, California. 

 June-July. 



24. VICIA [Tourn.] L. Sp. PI. 734. 1753. 



Herbaceous vines, with pinnate tendril -bearing leaves and conspicuous stipules. 

 Flowers axillary, solitary or racemose, purple or yellowish. Calyx with a somewhat 

 oblique tube and subequal or unequal teeth. Petals clawed; standard obovate to oblong, 

 emarginate; wings oblique-oblong, adherent to the shorter oblong keel. Stamens diadel- 

 phous; anthers uniform. Ovary sessile or stipitate; ovules many; style slender with a 

 tuft or ring of hairs at the apex. Pod strongly compressed, dehiscent, 2-valved; seeds 

 subglobose. [Classical Latin name of the Vetch.] 



About 130 species of wide geographic distribution. Type species, Vicia sativa L. 



Flowers sessile or on very short peduncles, 1 or 2 in the leaf axils; annuals. 



Flowers 20-30 mm. long; seeds black, globose. 1. V. sativa. 



Flowers 10-15 mm. long; seeds brown, somewhat compressed. 2. V. angustifolia. 



Flowers on more or less elongated peduncles. 



Corolla 4-7 mm. long; slender annuals. 



Pod hirsute, 2-seeded; peduncles 2-6-flowered. 3. V. hirsuta. 



Pod glabrous, several-seeded; peduncles 1- or rarely 2-flowered. 



Pod 8-12 mm. long, 3-4 mm. wide, rounded at both ends. 4. V. tetrasperma. 



Pod 25-30 mm. long, 5 mm. wide, obliquely pointed at both ends. 5. V. exigua. 



Corolla 10-20 mm. long; perennials except V. villosa. 



Racemes short, 3-8-flowered. 



Stems glabrous or nearly so; leaflets strigose or sometimes glabrate above; pods glabrous. 



6. V. americana oregana. 



Stems and leaflets villous-tomentose; pods pubescent. 7. V. calif ornica. 



Racemes elongated, one-sided, many-flowered. 



Flowers violet; pod not turning black. 



Annual or biennial, densely villous with spreading hairs; flowers violet. 



8. V. villosa. 

 Perennials, glabrous or appressed-pubescent. 9. V. Cracca. 



Flowers reddish purple to tawny; plants glabrous; pod and usually whole plant turning black in 

 drying. 10. V. gigantea. 



1. Vicia sativa L. Common or Spring Vetch. Tare. Fig. 2926. 



Vicia sativa L. Sp. PI. 736. 1753. 



Annual, the stems glabrous or sparingly pubescent, mostly ascending, 3-8 dm. high. Leaves 

 6-10 cm. long; leaflets 8-14, obovate or oblong to oblong-oblanceolate, 12-30 mm. long, truncate 

 or emarginate, mucronate, pilose-pubescent when young, becoming more or less glabrate in age ; 

 flowers 1 or 2 in the axils, sessile or subsessile, violet-purple, 20-25 mm. long ; calyx-teeth equal- 

 ing the tube ; pod linear-oblong, 4-7 cm. long, brown ; seeds slightly compressed. 



Roadsides and fields; naturalized on the Pacific Coast from Vancouver Island to southern California. Native 

 of Europe. April-Aug. 



Vicia Faba L. Sp. PI. 737. 1753. Horse Bean. Erect annual, 4-8 dm. high, glabrous or nearly so. Leaflets 

 oval to elliptic, 4—6 cm. long, obtuse, mucronate; tendril rudimentary or wanting; flowers in the axils, subsessile, 

 dull white with a large dark purple spot on the wings; pods 5-20 cm. long; seeds large, flat. Native of the Old 

 World, and cultivated since prehistoric times. Becoming naturalized in coastal central and southern California. 



2. Vicia angustifolia L. Smaller Common Vetch. Fig. 2927. 



Vicia angustifolia L. Amoen. Acad. 4: 105. 1759. 



Vicia sativa var. angustifolia Ser. in DC. Prod. 2: 361. 1825. 



Annual or winter annual, glabrous or sparsely puberulent, the stems slender, 3-6 dm. long. 

 Leaves 5-8 cm. long; leaflets 6-12, narrowly linear to oblong-oblanceolate, acutish to truncate or 

 emarginate, prominently mucronate, 15-25 mm. long, glabrate or sparsely appressed-puberulent ; 

 flowers 1 or 2 in the axils, sessile; calyx -teeth about as long as the tube; corolla violet, 12-18 

 mm. long ; pod linear-oblong, 4-6 cm. long, black ; seeds globose. 



Roadsides and fields, naturalized in the Pacific States from Washington to California. Native of Europe. 

 April-July. 



3. Vicia hirsuta (L.) Koch. Hairy Vetch or Tare. Fig. 2928. 



Ervum hirsutum L. Sp. PI. 738. 1753. 



Vicia Mitchellii Raf. Prec. Decouv. 37. 1814. 



Vicia hirsuta Koch, Syn. Fl. Germ. 191. 1837. 



Annual, the stems slender, 15-60 cm. long, glabrous or nearly so. Leaves 3-5 cm. long; 



