110 DIADELPHIA. DECANDRIA. 



and pedunculate, shorter than llie leaves, very fcw-flover- 

 ed. H AB In the shady forests of Ohio, Kentucky and Ten- 

 nessee, (common around Lexing-ton, Kentucky.) A very 

 singular and distinct species, with small, expanding flow- 

 ers, which are uniformly white Obs. Koot apparently 

 creeping", sending up short filiform weak stems at small 

 intervals; stems about a span high (rather resembling the 

 ascendmg branches of a humifuse plant), petioles 2 or 3 

 inches, stipules very minute, partial ones obliterated, la- 

 teral leaflets oblique, central one dilated, on both surfaces 

 a little hirsute, paler beneath, length about 2 inches, 

 breadth one and a half. Raceme long pedunculate, soli- 

 tary and terminal, bearing no more than from 4 to 8 white 

 flowers! the keel of which is commonly expanded; bractes 

 very minute by 3's; flowers by pairs; cahx nearly equally 

 5-toothed. Of the fruit, I am ignorant. The only species 

 to which the present appears to bear any affinity is //. ax- 

 illare of Jamaica. 16. lineatum. 17. rotimdifolium. 



18. * boreale. Caulescent, subdecumbent, leaves pin- 

 nate (r or 8 pair), leaflets oblong-obovate, partly villous; 

 racemes long pedunculate, axillary, stipules sheathing, 

 subulate; articulations of the loment nearly round, and 

 rugose. H. alpimim? Mich. Fl. Am. 2. p. 74. Hab. In 

 arid and denudated soils around Fort Mandan, on the 

 banks of the Missouri. Flowering in June and July. 

 Flowers of a fine red and numerous; common petiole very 

 short; calix subulate, wings of the corolla short. 



This very numerous and heteromorphous genus, con- 

 sisting of more than 130 species, is principally indigenous 

 to India, and America in botli hemispheres, but particu- 

 larly the Northern; there art- also species in the southern 

 extremity of Africa and in Japan, a few in Europe, Sibe- 

 ria, Northern Africa, and the Levant, but with pinnated 

 leaves, and in the Onobryctades producing 1-seeded le- 

 gumes. Amidst this \ ast family H- gyrans has long been ce- 

 lebrated for the spontaneous motion of its leaves, which 

 undulate as if in agitation, without the assistance of excite- 

 ment; my friend Dr. Baldwyn, late of Savannaii, an inde- 

 fatigable botanist, and an accurate observer, iniormed me, 

 that the same spontaneous motion is evinced by Hedysa- 

 rum ciispidatam, H. braciessum of Michaux; there is also 

 reason to suspect the same circumstance in //. Uvigatum. 



509. ZORMA. Gmelin, Michaux, 



Caiix campanulatc, bilabiate. Corolla infe- 

 rior. Vexillum cordate, re volute, dnthers 5 



