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68 



PLANT^ WRIGHTIAN-E 



V. 



t Cerasus (Microcerasus) 



Pl 



MiNUTiFLORA, Engelm, in Pl Lindh 2. p, 185, sub 

 Western borders o/Xexas; coU. of 1851, in frnit. A few fruiting speci- 



egatheredon the former journey, along the prairies of Turkey Creek, 



June ; but they were not distributed. The plant is a close congener of Amygdalus 

 microphylla, H. B. K. ; but the glaucescent leaves are entire, or nearly so, and very 

 obtuse, or retuse : the larger ones are three quarters of an inch long, not mcludmg 

 the slender petiole. The globular fruit is tomentulose, nearly half an inch m diam- 



thln flesh dry, narrowly grooved down the ventral 



hich 



inclincs to split, as in the Almond, in dried specimens, and to separate from the 



globosc, smooth and even putamen, the sutures of which are slightly and obtusely 

 ridged and grooved, not carinate, and the sides not at all compressed. 



182. SpiRiEA (Petrophytum) c^spitosa, Nutt in Torr. 8f Gray, Fl. 1. p. 418; 

 Graj/, Pl. Fendl. p. 40. Crevices of rocks on the mountains east of El Paso ; 

 forming dense flat tufts, from one to three feet in diameter ; Oct.* 



183. Cercocarpus parvifolius, Nutt in Torr. Sr Gray, Fl. 1. p. 427; Hook. Ic. 

 PL t 323: var. foHis plerisque vix dentatis. Mountains of New Mexico, 40-60 

 miles east of the Rio Grande ; Aug. (in fruit). The leaves are narrower and much 

 less toothed than in No. 194 of Fendler's coUection.f 



184. Fallugia paradoxa, Torr. in Emort/, JRep. t 2 ; Graj/, Pl Fendl. p. 41. 

 Sieversia paradoxa, Don. Gcum ? cercocarpoides, DC. Prodr. 2. p. 554. (ex Icon. !) 

 Banks of the Rio Grande and Nueces, Texas, and westward. — Geum dryadoides 

 may be the Cowania plicata, Don, the C. purpurea, Zucc. (Greggia rupestris, En- 

 gelm. in Wisliz. N. Mex.), abundantly met with by Gregg and others in Northem 



Mexico ; but its flowers are not white. 



X Potentilla paradoxa, Nutt in. Torr. Sf Graij, Fl. 1. p. 437. Between West- 

 ern Texas and New Mexico; coU. of 1851. — The root is annual or biennial. 



185. RosA blanda, Ait., ^. Torr. §• Gray, FL 1. p. 460. Along the Limpia, 

 Aug. ; in fruit. 



LYTHRACE^. 



186. Nes^a longipes (sp. nov.) : herbacea, ramosissima; ramis elongatis gracili- 

 bus ; foliis linearibus oppositis basi auriculata subsessilibus margine revolutis ; pe- 

 dunculis filiformibus in axillis solitariis unifloris sub flore bibracteolatis ; petalis 6 

 purpureis; staminibus 12 subsequilongis. — Low grounds, along the Rio Grande 

 and Medina, Texas, and west to Zacate Creek; July. (Near Parras, Gregg.) 

 Stems slender, from one to three feet long, diffuse or ascending, glabrous, as is the 

 whole plant, sHghtly angled. Leaves one to two inches long, one to two lines 

 wide, acute. Peduncles about as long as the leaves ; with a pair of small bractlets 

 very near the flower ; from the axils of which there is rarely seen the pedicel of an 



H. 



from it, was abundantly gathered by Dr. Gregg, near Saltillo and Buena Vista. It is a " shrub, eight 

 or ten feet high, growing on rocky clifFs." 



t Cercocarpus fothergilloides, H.B.K., was likewise gathered by Dr. Gregg, near Saltillo ; where it 

 forms "a large, evergreen shrub." 



s 



