Genus 13. 



PEA FAMILY. 



359 



I. Lotus corniculatus L. Bird's-foot Trefoil. Ground Honeysuckle. Bloom-fell. 



Fig. 2488. 



Lotus corniculatus L. Sp. PL 775. 1753. 



Perennial from a long root, appressed-pubescent or 

 glabrate. Stems slender, decumbent, or ascending, 3'-2° 

 long; leaves 3-foliolate, short-petioled ; leaflets obovate, 

 oblanceolate or oblong, 3"-8" long, obtuse or acute ; 

 stipules similar to the leaflets, and often as large; pe- 

 duncles elongated, sometimes 4'-6' long, umbellately 

 3-12-flowered ; calyx-lobes acute, as long as the tube, 

 or shorter; corolla bright yellow, 6"-9" long, or the 

 standard reddish ; pods linear, about l' long, spreading, 

 several-seeded. 



In waste places and on ballast. Nova Scotia, New Bruns- 

 wick, and about the seaports of the Eastern and Middle 

 States to Washington, D. C. Adventive from Europe. Na- 

 tive also of Asia, and widely distributed as a weed. Crow- 

 toes (Milton). Cross-toes. Cat's-clover. Sheepfoot. Bird's- 

 eye. Ladies'-fingers. Devil's-fingers. Shoes and stockings. 

 Claver. June-Sept. 



14. HOSACKIA Dougl. ; Benth. Bot. Reg. 15 : pi. 1257. 1829. 



Herbs, mostly with pinnate leaves, but these sometimes with only i leaflet or 3, as in the 

 following species, the umbellate or solitary, yellow, red or rose-colored flowers on bracted 

 axillary peduncles. Calyx-teeth nearly equal. Petals free from the stamen-tube, the stamens 

 diadelphous; standard ovate or suborbicular, wings oblong or obovate; keel incurved, mostly 

 pointed or beaked. Pod linear, flattened or nearly terete, not stipitate. [In honor of David 

 Hosack, 1769-183S professor of botany and materia medica in Columbia College.] 



About 50 species, natives of North America, all except L. Helleri Britton of North Carolina, 

 and the following species, confined to the western part of the continent. Type species : Hosackia 

 hicolor Dougl. 



I. Hosackia americana (Nutt.) Piper. Prairie Bird's-foot Trefoil. Fig. 2489. 



Trigonella americana Nutt, Gen. 2: 120. 1818. 

 Lotus sericeus Pursh, Fl. Am. Sept. 489. 1814. Not DC. 1813. 

 Hosackia Purshiana Benth. Bot. Reg. under pi. 12 $7. 1829. 

 Lotus americaniis Bisch. Litt. Ber. Linnaea 14: 132. 1840. 

 Hosackia americana Piper, Contr. U. S. Nat. Herb. 11: 366. 

 1906. 



Annual, erect, branched, villous-pubescent, or glabrate, 

 io'-2o' high. Leaves 3-foliolate, or the upper sometimes 

 i-foliolate, sessile or the lower on petioles about i" long; 

 stipules minute or none; middle leaflet slightly longer- 

 stalked than the lateral ones, oblong, the lateral lanceolate, 

 rounded at the base, s"-8" long, 2"-3" wide; peduncles 

 axillary, i-flowered, p'-ia" long in fruit, leafy-bracted at 

 the summit; flowers rose-color, about 2" long, the standard 

 darker-veined ; calyx-lobes linear, about twice the length of 

 the tube; pods straight, about i' long, acute, glabrous, 4-7- 

 seeded, deflexed. 



In dry soil, Minnesota to North Dakota, Idaho, Missouri, 

 Arkansas, Texas, New Mexico and Sonora. Recorded as introduced in Illinois. Wild vetch. 

 Summer. 



15. ANTHYLLIS [Tourn.] L. Sp. Pi. 719- i753- 

 Herbs, or some species shrubby, with pinnate leaves, the stipules small or none, and 

 bracted capitate flowers. Calyx somewhat swollen, persistent, S-toothed. Petals long-clawed; 

 standard and wings ovate; keel incurved, shorter than the wings, obtuse or short-pointed; 



