V. PLANTS WRIGHTIAN^. 53 



acutis arcuato-incurvis lunatisve coriaceis glabris (nunc Isevibus nunc reticulatis) su- 

 turis utroque introflexis subbilocellatis. — Near Austin, Texas, in Mr. Wright's 

 earlier collection. (Near Houston and Brazos, Lindheimer. Mason County, Illi- 

 nois, Dr. Mead.) — Flowers 4 or 5 lines long, bluish or purplish : the keel tipped 

 with violet; the vexillum conspicuously notched at the apex. Pod 7 to 9 lines 

 long, following the curvature, not usually abruptly bent or twisted, but strongly 

 arcuate or lunate-incurved, at least when fully ripe, broader transversely than 

 through the sutures. — A. obcordatus has obcordate leaflets, an entire or barely re- 

 tuse vexillum, and much broader and larger legumes, which are chartaceous, lateral- 

 ly compressed, straighter, slightly lunate, with the upper suture salient and acute, the 

 lower introflexed, but so little that Mr. Shuttleworth referred the plant to Phaca. 



:J: A. MOLLissiMus, Torr. in Ann. Lye. N. Y. 2. p. 178 ; Grai/, PI. Fendl. p. 35. 

 New Mexico; coll. of 1851, in fruit. 



140. OxYTROPis Lamberti, Pursh ; Bot. Mag. t. 2147; Bot. Reg. t. 1054 (var.). 

 Hills east of Austin, Texas, April ; in flower. A remarkably large-flowered, loose- 

 ly-racemed form of the species. 



141. Desmodium Neo-Mexicanum (sp. nov.): annuum, pubescens ; caule gracili 

 subpedali erecto ramoso ; foliis omnibus trifoliolatis ; foliolis linearibus reticulatis 

 mucronulatis subtus prtecipue ad margines pilosis ; stipulis subulatis aristatis ; lo- 

 mento substipitato, articulis parvis puberulis rotundatis medio adnexis. — Mountain 

 valley 30 miles east of El Paso ; Oct. Specimens in fruit only. — Leaflets from half 

 an inch to an inch and a quarter long, one to two lines wide, acutish, strongly and 

 coarsely reticulated beneath. Flowers small. Fructiferous pedicels half an inch 

 lone or more. Joints of the loment little over a line in diameter.* 



142. Desmodium Wrightii {Gray, PL Lindh. 2. p. 177): caulibus e radice pe- 

 renni gracilibus ramosis puberulis ; foliis omnibus unifoliolatis breviter petiolatis ; 

 foliolo membranaceo oblongi-ovato basi subcordato fere glabro subtus pallido ; stipu- 

 lis stipellisque subulatis minimis ; racemis laxis ; lomento 3 - 4-articulato breviter 

 stipitato, articulis insequilateris ovalibus. — Thickets near Austin, Texas. (In deep 

 rocky ravines of the Guadaloupe above New Braunfels, Lindheimer; 1850.) — Stems 

 one or two feet high. Leaves veiny, pale and minutely pubescent underneath, mu- 

 cronulate ; the larger two inches long, on petioles half an inch long ; the upper 

 sometimes acute. Legume less than an inch long ; the stipe as long as the stami- 

 neal tube. 



143. Crotalaria lupulina, DC. Prodr. 2. p. 133. Fields, near Presidio de San 

 Elisario and El Paso ; introduced. Called " Frijolillo." 



* Allied to this and to the succeeding is the subjoined from Northern Mexico : — 



Desmodium Wislizeni {Engelm. ined.) : tenellum, puberulum ; caulibus e radice perenni pluribus dif- 

 fusis ; foliis inferioribus unifoliolatis, summis ssepius trifoliolatis ; foliolo terminali ovato vel oblongo obtu- 

 80 ssepe subcordato reticulato scabrido, lateralibus dum adsunt minoribus oblongis ; stipulis bracteisque 

 subulato-setaceis conspicuis ; racemo elongato ; lomento breviter stipitato 3 - 6-articulato, articulis ovali- 

 rhomboideis glaberrimis medio adnexis. — Cosiquiriachi, Northern Mexico, WisUzenus. — Stems a span or 

 more in length. Leaflets thicker than those of D. Wrightii, conspicuously reticulated underneath, 6 to 10 

 lines long. Flowers very small. Loment 5 to 8 lines long when of 4 or 5 joints. 

 VOL. III. ART. 5. — 8. 



