DIADELPHIA DECANDRIA. 



475 



574. PSORALEA. Gen. pL 1210. 



1. P. tota canescens J foliis breviter petiolatis trifoliatis, canescens. 



spicis laxifloris, floribus pedicellatis, calycibus villo- 

 sissimis. Mlch.Jl.amer.2. p. 57- 

 In barren sandy fields of Carolina and Georgia. July. 

 V. s. Resembles in appearance Cytisus Cajan. 



2. P. parce pubescens ; foliis ternatis : foliolis lanceolatis, meliloloides. 



spicis oblongis, bracteis lato-cordatis longissime acu- 



minatis, leguminibus rotundatis nervoso-rugosissimis. 



— Mich.Jl amer. 2. p. 58. 

 Melilotus flore violaceo, odore remisso. Clayt. n. 103. 

 Trifolium psoraloides. Walt.fi. car. 184, 

 In pine-barrens : Carolina to Florida. %. June — Aug. 



V. s. in Herb. Leconte. Flowers blue. 



3. P. pubescens, ramosissima; foliis ternatis: foliolis el- tenuiflora. 



lipticis utrinque rugoso-punctatis, pedunculis axillari- 

 bus folio longioribus sub-3-floris. 

 On the banks of the Missouri. M. Lewis. 71 . Sept. 

 V. s. in Herb . Lewis. Flowers very small, pale blue. 



4. P. pubescens ; foliis ternatis : foliolis elongato-lanceola- lanceolata. 



tis, petiolis crassis, spicis axillaribus folio vix longiori- 

 bus densifloris, floribus pedicellatis, bracteis pedicello 

 vix longioribus, dentibus calycis coloratis. 

 On the banks of the Missouri. %. July, Aug. v. s. 

 Flowers bright blue, small. 



5. P. undique argent eo-tomentosa ; foliis ternatis : foliolis argophylla. 



lanceolato-oblongis, spicis terminalibus interruptis, 

 bracteis ovatis acuminatis, floribus suboppositis ses- 

 silibus. 

 On the banks of the Missouri. 1/ . v. s. Flowers 

 purple : the silvery tomentura gives this plant a par- 

 ticularly handsome appearance. 



6. P. undique villosa ; foliis digitato-quinatis: foliolis Ian- esculenta. 



ceolatis in?equalibus planis integerrimis, spicis axillari- 

 bus densifloris, laciniis calycis lanceolatis corolla paulo 

 brevioribus, leguminibus ensiformi-rostratis, radice 

 fusiformi. 



On the banks of the Missouri. M. Lewis. 11 . June, 

 July. V. s. in Herb. Lewis. Flowers pale blue. 



Tota planta pilis longis albidis tecta. Radix fusiformis, 

 crassa, exsiccatione farinosa. Caulis erectus, subra- 

 mosus, teres, sulcatus, pedalis et ultra. Folia alterna. 



