LEGUMINOS^:. (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. dist6rtUS, Torr. & Gray. Low and spreading, branched from the 

 base, smoothish ; leaflets 1 1 - 23, oblong or obovate ; flowers purplish vc violet, 

 10-20 in a short spike ; the standard deeply notched at the summit ; pods 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; cwolla 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, flattish (' 

 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. OXTTTBOPIS, DC. OXYTROPIS. 



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

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

 suture. Our species, and most others, are low, nearly acaulescent pe^nnials, 

 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 ovs, sharp, and rpoTris, keel.) 



1. O. campdstris, 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 Isles, G. L. Goodale, and north- 

 ward. July. (Eu.) 



2. O. Lamb^rti, 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. LIQUOEICB. 



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- 



