294 DIADELPHIA DECANDRIA. QcL. XVII. 



upper edge ; the other hair-like, separate ; anthers roundish. Ger- 

 men oblong, compressed. Style cylindrical, ascending at a right 

 angle ; stigma knobbed, all over hairy. Legume oblong, com- 

 pressed. Seeds from two to four, roundish. Name from the 

 Celtic erw, a ploughed field. 356. 



1. E. hirsutum. Hairy Tare. Clusters many-flowered ; legumes hairy, 



two-seeded ; leaflets abrupt. Stem two or three feet long, nearly 



smooth : flowers whitish or pale-blue. Annual : flowers in June and 

 July : grows in fields and hedges: common. Eng. Bot. vol. xiv. pi. 970. 

 Eng. Ft. vol. iii. p. 289. 1057. 



2. E. tetrasptrmum. Smooth Tare. Flowers in pairs ; legumes smooth, 



four-seeded ; leaflets oblong, bluntish. Stem two or three feet long, 



more or less hairy, as are the leaves ; flowers pale-grey or bluish. An- 

 nual: flowers in June and July: grows in fields and hedges: not so 

 common as the last. Eng. Bot. vol. xvii. pi. 1223. Eng. Ft. vol. iii. 

 p. 228. 1058. 



12. ORNI'THOPUS. BIRD'S-FOOT. 



Calyx inferior, tubular, with five nearly equal, marginal teeth. 

 Corolla of five petals ; standard inversely egg-shaped, entire, 

 ascending; wings rather smaller, inversely egg-shaped, curved 

 upwards ; keel smaller, of two rounded, united petals, with sepa- 

 rated claws. Filaments ten, nine united into a compressed tube, 

 open along its upper edge, the other hair-like, separate ; all curved 

 upwards at the end; anthers minute, roundish. Germen linear, 

 compressed. Style slender, ascending ; stigma knobbed, bare. 

 Legume curved, compressed, jointed, finally separating at the 

 joints, each of which contains one roundish seed. Name, from 

 ornis, a bird, and pous, a foot. 357. 



1. 0. perpusillus. Common Bird's-foot. Leaves pinnate ; flowers in 



heads ; legumes curved inwards, bead-like. -Stems procumbent, from 



three to tea inches long : leaves of numerous pairs of elliptical, hairy 

 leaflets : flowers three or four in each head, which is accompanied by a 

 pinnate leaf: corolla white, veined with red, the keel greenish. An- 

 nual : flowers in May : grows in sandy pastures : frequent. Eng. Bot. 

 vol. vi. pi. 369. Eng. Fl. vol. iii. p. 290. 1059. 



13. ARTHROLO'BIUM. JOINT- VETCH. 



Calyx inferior, tubular, with five teeth. Keel of the corolla 

 very small. Legume nearly cylindrical, smooth, composed of 

 several joints, each containing a single seed. Name from art/iron, 

 a joint, and lodos, a pod. 358. 



1. A. ebractedtum. Sand Joint-vetch. Stem thread-like ; leaf-stalks 

 two-flowered, nearly equal to the leaves ; stipules very small ; leaves pin- 

 nated ; leaflets equal, the lower ones remote from the stem. A small 



plant, resembling the preceding in habit. Annual : flowers in July and 

 August: found by Messrs. Babington and Christy in sandy ground in the 

 islands of Guernsey and Jersey. Scilly Islands. Brit. Fl. 4th ed. 

 p. 273. Prim. Fl. Sarn. p. 29. 1060. 



