Vor,. II.] PEA FAMILY. 311 
30. HEDYSARUM I. Sp. Pl. 745. 1753. 
Perennial herbs, sometimes shrubby, with odd-pinnate leaves, and showy flowers in ax- 
illary peduncled racemes. Calyx bracteolate, its teeth nearly equal. Standard obovate or 
obcordate, narrowed at the base; wings oblong, shorter than the standard; keel longer than 
the wings, obtuse, obliquely truncate. Stamens diadelphous (g and 1). Pod flat, linear, its 
joints oval, orbicular or quadrate. [Greek, sweet-broom. ] 
About 60 species, natives of the north temperate zone and northern Africa. Besides the follow- 
ing, another may occur in northwestern North America. 
Calyx-teeth ovate, acute, shorter than the tube. 1. H. Americanum. 
Calyx-teeth subulate, acuminate, longer than the tube. 2. H. Mackenzit. 
1. Hedysarum Americanum (Michx.) Britton. Hedysarum. (Fig. 2165.) 
Hedysarum alpinum var. Americanum Michx. FI. Bor. Yh 
Am. 2:74. 1803. AH) y 
Hedysarum boreale Nutt. Gen. 2: 110. 1818. ES ) Ga 
Hedysarum Americanum Britton, Mem. Torr. Club, 5: WY 
201. 1804. 
Stem erect or somewhat decumbent, glabrous or 
nearly so, 6’-2%° high, generally simple. Leaves 
short-petioled; stipules lanceolate, long-acuminate, 
2//-8’’ long; leaflets 11-21, oblong or oblanceolate, 
obtuse and often mucronulate at the apex, mostly 
rounded at the base, 6’’-10’’ long, 2//-5’’ wide; ra- 
cemes longer than the leaves; flowers violet-purple, 
or sometimes white, numerous, deflexed, 7//-10/’ 
long, in rather loose elongated racemes; calyx-teeth 
ovate, acute, shorter than the tube; pod 4’-14’ long, 
drooping, of 3-5 oval or orbicular nearly glabrous 
strongly reticulated joints, about 2%’ wide. 
In rocky places, northern New England to Labrador 
and Newfoundland, west to Alaska and British Columbia, 
south in the Rocky Mountains to Utah and in the Black 
Hills. Recorded by Michaux from the Alleghanies. 
Occurs also in northeastern Asia. June-July. 
2. Hedysarum Mackénzii Richards. Macken- 
zie’s Hedysarum. (Fig. 2166.) 
Hedysarum Mackenzii Richards. App. Frank. Journ. 17. 1823. 
Hedysarum Americanum Mackenzii Britton, Mem. Torr. 
Club, 5: 202. 1894. 
Similar to the preceding species, but usually minutely 
pubescent; stem decumbent or erect, 1°-2%° high, some- 
times branched. Leaflets 11-19; flowers slightly larger, 
violet-purple, deflexed; calyx-teeth subulate, acuminate, 
longer than the tube, or equalling it; pod minutely pubes- 
cent, 3-8-jointed. 
Hudson Bay (according to Macoun); Northwest Territory to 
Alaska, south in the Rocky Mountains to Colorado. Summer. 
31. AESCHYNOMENE I.. Sp. Pl. 713. 1753. 
Herbs, or in tropical regions shrubs, mainly with odd-pinnate leaves, and yellow flowers 
in axillary panicles or clusters Calyx-teeth nearly equal, more or less united into 2 lips. 
Standard orbicular, short-clawed; wings oblong or obliquely obovate, about as long as the 
standard; keel curved. Stamens diadelphous (5 and 5); anthers all alike. Ovary stipitate; 
ovules 2-m. Pod stalked in the calyx, flat, jointed. [Greek, to be ashamed, referring to 
the sensitive leaves. ] 
About 55 species, widely distributed in warm and tropical regions. Besides the following, 
another occurs 1n the southern States. 
