DIADELPHIA DECANDRIA 405 



with the persistent base of the style, supported on a short stipe in the tube of the 

 calyx. Seeds becoming loose, and rattling in the parchment-like legume. 



JUab. Dry, sandy banks; roadsides: frequent. .FY. July— Aug. Fr. Aug— Sept. 



Obs. Two or three additional species are enumerated in the U. States ; — though 

 I have a suspicion the C. Purshii, DC. (C. laevigata, Pursh,) may be only a varie- 

 ty of the C. pareijiora. There is a species of this genus (C. juncea, L.) which in 

 1807, 1 observed was extensively cultivated in Bengal, near Calcutta, as a substi- 

 tute for Hemp. I succeeded in growing it, at West Chester, on my return ; but I 

 doubt its being worthy of culture in this country. 



Sub-7r.be 2. Mostly herbaceous. Leaves mostly trifoliate ; primordial ones 

 alternate. Stamens Diadeiphous. Trifolibjb. DC. 



336. MEDICAGO. L. jYutt. Gen. 624. 

 [So named, by the Greeks, from its having been introduced by tbe Medea.] 



Calyx subcylindric, 5-cIcft. Keel somewhat remote from the vexil- 

 lum. Legume of various forms, — always more or less falcate, or spi- 

 rally twisted, — mostly many -seeded, rarely 1 -seeded. 



1. M. lcpulixa, L. Stem procumbent; leaflets cuneate-obovate, 

 dcnticulafe at apex ; stipules ovate-lanceolate, acuminate, mostly den- 

 tate; racemes capitate, ovoid, on longish peduncles; legumes reniforra, 

 reticulatcly veined, scabrous, 1 -seeded. Beck, Mot. p. 78. 

 Hop-likk Mbdicago. Vulgd— None-such. 

 Gallic*— Luzerne boublonnl-e. Gcrmanice— Die Hopfcn luzerne. 



Jfcrf biennial, VV.ll,!. DC. <fcc. annual,*,,. Torr. Heck, be. Stem 6 to 9 or 12 

 inches long, mostly several from the same root, procumbent, or ascending, some- 

 what branched, angular, piloae. Uajlels half an inch to near an inch loner, ami 

 1 third to 3 fourths of an inch wide, mostly cuneate-obovate, sometimes nearly 

 rhomboid, obtusely denticulate above the middle, retuse at apex, with a short 

 broad acute central p»Un,-lateral leaflets subsessile, terminal one petiolate ; eom- 

 ™"PeUoles 1 fourth of an inch to an inch long ; stipules semi-amplexicaul acu- 

 mTT y T 18 - UUUh ° f fl ° WerS 8,nM > al firsl ™ndU, finally ob- 

 lTrl'2 t r aX " lary PUbe8CCnt ''*"*• ■ * 2 in <*es '« lengU. ; peliceU 



very short, with minute subulate-fdiform bracts at base. Calyx hairy, with acuta 

 anequa. segments. Corolla yellow, smali. Legume short, compre Jd, curved t 

 reniform, mgose-nerved and hairy, I-celled and 1-seeded. 



Hob. Fields, and roadsides; Marshallton: rare. Fl. June-Aug. Fr July-Sept 

 I »?nl,?« i8aU ( inlr ; , | duced P la nt; and notgenorally naturalized in thisCounty. 

 ^T^SSEST**"^ SS ofthelateJ/J. 



™„™J A L IVA ' L ,* St6m mther erect: ^"A" obovate-oblone, or 



nearly entire; racemes oblong, rather loose ; legumes sbirallv con. 

 lorted, smoothish, many-seeded. DC. Prodr. 2. pf 1 7 T * 



Cc, TI v ATED Mei „caoo. Vul g 6~Luce^ t e. Spanish Trefoil. 



