LEGUMINOS^E. (PULSE FAMILY.) 133 



the discoverer, the late Wm. Cooper, there being already an A. neglectus.) — 

 Gravelly shores, &c., W. New York to Wisconsin. June, July. 



6. A. distortus, Torr. & Gray. Low and spreading, branched from the 

 base, smoothish; leaflets 11-23, oblong or obovate ; flowers purplish or violet, 

 10 - 20 in a short spike ; the standard deeply notched at the summit ; ports oblong, 

 turgid, incurved (§' long), coriaceous, incompletely -2-celled. — Mason Co., Illinois, 

 Dr. Mead. May. (Also in Arkansas and Texas.) 



§ 3. Pod dry and dehiscent, thin-walled, small, stalked in the calyx (stipitate), and with 

 it more or less pubescent with fine blackish hairs, hanging on short pedicels : ra- 

 ceme short, rather many-flowered, long-peduncled : leaflets oval or oblong. 



7. A. alpinus, L. Smooth or slightly hairy; stem diffuse, 6' to 12' high; 

 leaflets 13-25; corolla violet-purple, or at least the keel tipped with violet or 

 blue (5" -6" long); pods black-hairy, oblong, deeply grooved on the back and 

 partly 2-celled by the intrusion of the dorsal suture, its stipe usually rather 

 exceeding the calyx. — Rocks and banks, Northern Vermont (Willoughby 

 Mountain, J. Blake) and Maine (Dr. Scammon, G. L. Goodale), and north- 

 ward. June, July. (Eu.) 



8. A. Robbinsii, Gray. Nearly smooth and erect (1° high), slender; 

 leaflets 7- 11 ; corolla white (4" long) ; calyx-teeth short; pods oblong, fiattish (^' 

 long), membranaceous, almost glabrous, the base suddenly contracted into a stipe 

 about equalling the calyx, one-celled, a thin membrane slightly projecting from 

 the dorsal suture. (Phaca Robbinsii, Oakes.) — Rocky ledges of Onion River, 

 at Colchester, Vermont, Dr. Bobbins (1829) : the station now obliterated. May. 



15. OXYTROPIS, DC. Oxtteopis. 



Keel of the corolla tipped with a sharp projecting point or appendage : other- 

 wise as in Astragalus. Pod often partly 2-eelled by the intrusion of the ventral 

 suture. — Our species, and most others, are low, nearly acaulescent perennials, 

 with tufts of numerous very short stems from a hard and thick root or rootstock, 

 covered with scaly adnate stipules ; pinnate leaves of many leaflets ; and naked 

 scapes bearing a head or short spike of flowers. (Name indicates the peculiarity 

 of the flower, from o£vs, sharp, and rponis, keel.) 



1. O. campestris, DC. Pubescent or smoothish; leaflets lanceolate or 

 oblong : flowers yellowish or white, often tinged or tipped with purple or violet- 

 blue; pods ovate or oblong-lanceolate, of a thin or papery texture. — Northern 

 border of Maine, on the St. John's, near Seven Lsles, G. L. Goodale, and north- 

 ward. July. (Eu.) 



2. O. Lamberti, Pursh. Silky with fine appressed hairs ; leaflets mostly 

 linear ; flowers larger, purple, violet, or sometimes white ; pods cartilaginous or 

 firm coriaceous in texture, strictly erect, cylindraceous-lanceolate and long-pointed, 

 almost 2-celled by intrusion of the ventral suture. — Dry plains, Minnesota and 

 westward. June. 



16. GLYCYRRHIZA, Tourn. Liquorice. 



Calyx with the two upper lobes shorter or partly united. Anther-cells con- 

 fluent at the apex, the alternate ones smaller. Pod ovate or oblong-linear, com- 



