DIADELPHIA. DECANDRIA. 101 



Levant. From ^i. gnrnmlfer and A. cretic-is is obtained 

 the gum Trag-acantli, from the latter it is white, and 

 from the former yellowish; A. Tra^acantha affords no 

 gum whatever. 



If If Legume mostly 1-seeded, (Stamina diadcl- 

 phous.) 



501, DALEA. L, 



Callx scmifjiiinquifid. Corolla partly papilio- 

 naceous. Wings and carina adnate to the undi- 

 vided column of the stamina. Legume 1-seeded, 

 inr! tided in tlje calix. 



Herbaceous; leaves pinnate, interspersed with diapha- 

 nous glands in common with the calix; flowers in dense 

 and terminal spikes, rarely racemose, unibracteate. Dis- 

 tinguished from Pctalostemon by the suhpapilionaceous 

 corolla, and the insertion of the adnate petals far below 

 tfje separating filaments, and not alternating v/ith them in 

 tiie same line, the presence of 10 in place of 5 stamina is 

 also of some importance in this family of plants- 

 * Species. 1. D. alopecuroides. I). CUffortiana. Willd, 



sp. pi. 3. p. 1.336. n. pedunailata? Vn. 2. p. 474. I). 

 lAnnxi. Mich. fior. Am. 2. p. 57. t. 38. J^etnlostermn alope- 

 cm-oideu]!}. Ph. 2. p. 461. Hab. Common on the banks 

 of the Missisippi and the Missouri in alluvial soil. The 

 number of leaflets, as miglitbe expected in so compound 

 a leaf, are variable both in number and a little so in form. 

 Vexillum white, wings and carina pale violet. Micliaux's 

 figure is excellent. 2..aisrea. T. X.in Fras. Catal. 1813. Ph. 

 2. p. 140. Perennial; stem erect; spikes dense and cylin- 

 dric, flowers yellow; bracies rh.omboidally ovate, as long 

 as the calix; calix densely lanuginous, dentures subulate; 

 leaflets (about 9,) obovate, under side pilose. Hab. On 

 g.-avelly hills, near White river, iSIissouri; rare. 



3. laxijlora. Ph. Very smooth; stem erect and- tail, 

 branched above, brandies slender and effuse; racemes 

 few-flowered; flowers distinct, enneandrous; bractcs 

 smooth, obvallate, acute; segments of the calix acumi- 

 nate, sericeous and plumose; leaves about 4 pair, linear- 

 oblong. Hab. Ow the high hills and naked grassy plains 

 of the Missouri, also on the banks of the Missisippi 

 near the Prairie du Chien. Oes. Perennial, root reddish 

 and somewhat fusiform. Stem simple, round, andsmooth, 

 of a brownish colour, 3 or 4 feet high, divaricating at the 



