170 Plants collected during a journey 



which respect, and also in its smooth calyx, it differs from 

 most of the Psoraleae. 



76. P. ? latifolia, foliis trifoliolatis ; foliolis lato-ovatis, 

 acuminatis, subglabris, margine ciliolatis, impari longe peti- 

 olato ; pedunculis axillaribus ; spicis laxifloris, elongatis, 

 bracteis caducis ; calycibus glabris, deniibus acutiusculis. 



Desc. Herb perennial. Stem 2-3 feet high, branched, sulcate, strigose. 

 Leaves on long petioles, ternate ; petioles canaliculate above, with subulate 

 stipules at the base ; leaflets ovate, remarkably acuminate, 2-3 inches long, 

 membranaceous, slightly pubescent on the nerves beneath, all of them pe- 

 tiolate, the lateral ones on short petioles ; margin ciliate. Peduncles 3-4 

 inches long, axillary, angular, strigosely pubescent ; spikes 2-3 inches long, 

 linear-lanceolate, at first dense, but loose when mature. Flowers small, 

 fasciculate, on short pubescent pedicels. Bracts subulate, caducous. 

 Calyx campanulate, without glands, smooth, except the dentures, which 

 are sparingly ciliate. T r exillum roundish, expanded. Stamens diadelphous, 

 Germen 1 -seeded. 



Hab. On the Missouri, near St. Louis. Flowers in June, 

 Dr. Baldwin. 



Obs. In habit, this species resembles P. melilotoides, but 

 is easily distinguished by its broad acuminate leaves. It is 

 probably not a genuine Psoralea, but the genus to which it 

 properly belongs can only be ascertained by examining the 

 mature fruit. 



77. Indigofera, n.sp., allied to I. miniata. Flowers scar- 

 let. This species was discovered in 1819, by Mr. Nuttall, on 

 the Red River. 



78. Clitoria virginica, L. Purshfl. ii. p. 487. DC. 

 prod. ii. p. 234. On the Arkansa, near the junction of the 

 Canadian. 



79. Petalostemum macrostachyum, spica cylindrica, 

 compacta, longissima ; bracteis lanceolatis, calycibusque seri- 

 ceo-villosissimis ; foliolis subtrijugis, lanceolato-oblongis ? 



glabris. 



Desc. Root perennial. Stem two feet high, branched above, erect, 

 •ulcate, smooth. leaves, pinnate, scattered ; petiole subterete, punctate, 



