VOL. II.] 



PEA FAMILY. 



30. HEDYSARUM L. Sp. PI. 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 (9 and i). Pod flat, linear, its 

 joints oval, orbicular or quadrate. [Greek, sweet-broom.] 



About 60 species, natives of the north temperate zone and northern Africa, 

 ing, another may occur in northwestern North America. 



Calyx-teeth ovate, acute, shorter than the tube. 

 Calyx-teeth subulate, acuminate, longer than the tube. 



Besides the follow- 



1. H. Americanum. 



2. H. Mackenzii. 



i. Hedysarum Americanum (Michx.) Britton. 



Hedysarum alpinum var. Americanum Michx. Fl. Bor. 



Am. 2: 74. 1803. 



Hedysarum borealeNutt. Gen. 2: no. 1818. 

 Hedysarum Americanum Britton, Mem. Torr. Club, 5: 



201. 1894. 



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 // -io // long, 2 // -5 // wide; ra- 

 cemes longer than the leaves; flowers violet -purple, 

 or sometimes white, numerous, deflexed, 7 // -io // 

 long, in rather loose elongated racemes; calyx-teeth 

 ovate, acute, shorter than the tube; pod l / f -i%' l n g> 

 drooping, of 3-5 oval or orbicular nearly glabrous 

 strongly reticulated joints, about 2j^ // 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. 



Hedysarum. (Fig. 2165.) 



2. Hedysarum Mackenzii 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, i-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 L. Sp. PI. 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 2-00. 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 in the southern States. 



