F 



37 



125. Mimosa malacophylla Gray. Sautii Maria (Cameron couiify). 

 125a. Mimosa strigillosa Ton- ifc Gray. Brazos Wuiifciafro. 



126. Leucasna retusa BtMith. Liiupia canon (Pretsidio comity). This species was 



collected by Wrif/ht {no. 171) in western Texas iu 1849, and in Now Mexico 

 (no. 104(;) in 1851; ihcn hy tlm Mexican lUnindary Survey (no. :318) in the 

 valley of the Kio Grande below Donna Aua ; most recently by Rcvervhon 

 (no. 12G;i) on rocky bluHfs near Junction City (Kind)le comity). 



127. Acacia ameutacea DC. lionia (Htarr county). Tl.i.s collection brings to 



liand, for tiio lirst time, the mature legmiies of thi« species, at least J5en- 

 tham, iu his lUv. MimoiifA!; says " logumcn ij,niotmii," and 1 find no recoi'd ot 

 any subsequent discovery. The Icgimie is short-stipitate, arcuate, 7.5 to 

 10'"'. lon^r, and but 4 to G""". wide. It thus ditters from its congener, A. Jlexi- 

 caidis, iu its sti]>itate and very narrow legume, as well as in its loaves with a 

 single pair of pinn:e. 



128. Acacia Berlandieri Henth. Hidalgo (Hi<la!go county). Apparently quite 



common on the dry hills of the lower Rio Grande. 



129. Acacia coiiBtricta Iknth. Koma (8tarr connty.) An abundance of fine fruit- 



ing specimens. 



130. Acacia Faruesiana Willd. Hidalgoj Hidalgo county) and Koma (Starr 



connty). 



131. Acacia filicina Willd. Cliisos Mountains (Foley County). Onr plants show 



an unusual reduction of the leaves of this abundant and exceetliugly vari- 

 able species, the pinna; being 2 to 5 pairs, and the leadets 5 to 10 pairs. 



132. Acacia flexicaulis licntb. Santa Maria (Cameron connty). This species 



seems to belong to both coasts, having been found by Dr. Talmer at Corpus 

 Christi Bay, and by Mr. Nealley along the coast of Cameron county ; also by 

 Xantus along the coast of Lower California from Cape St. Lucas northward 

 and by Dr. Taliner at Los Angeles Bay. ' 



133. Pitliecolobium (Unguis-catij Texense Coulter, «. sp. A shrub or small tree 



armed with short stout stipular spines, the inJlorosccncc and branchlets pu- 

 beruleut: leaves with 1 or-^pinn:e, the lower pair (if any) much the smaller; 

 Icallets iu the upper part of pinnaj 3 or 4 pairs, in the lower 1 or 2 pairs' 

 obliquely elliptical and the terminal pair mostly ol>ovato, venuloso and with 

 more or less exceutric midrib, 6 to 10""" long, 4 to G""" wide : peduncles (about 

 12""" long) apparently in axillary clusters (in fact on very nmch reduced 

 branches) : spike rather loosely dowered, oblong, 2.5 to 4'^'" long: the stam- 

 iiual tube exserted : pod coriaceous, becoming very hard andlnore or loss 

 urciiate, with the thickened edges somewhat impressed between the seeds 

 10 to 15"" long, 18 to 25""" wide, about 8-seeded.-Near Koma (Starr county)! 

 This species bears a somewhat striking resemblance to Acacia Jlexicaulin, and 

 it is more than probable that it has been collected and referred to that 

 species. If collected only in foliage and fruit it would most ])robably be r'e- 

 I'erred to A. flexicau lis. However, the dowers not only show tbe indelinito 

 monadelphous stamens of the tribe Ingeiv, but the stamineal tube isexserted. 

 Belonging to the Uni/iiis-caH section, it dilfers from those with oblong spikes 

 in the leaves having usually a second and smaller pair of pinna-. Its nearest 

 allies belong to tropical America, some of them reaching north into Mexico. 



134. Cowauia plicata D. Don. Chisos Mountains (^Foley county). A north Mexi^ 



can species, reported for the hrst time within our borders. 



135. Falliigia paradoxa Endl. Near Bone Spring (Foley county). 



136. Sedum Wrightii Gray. Devil's Kiver (Val Verde county). 



137. Lythrum alatum I'ursh, var. linearifolium Gray. Santa Maria (Cameron 



county). 



138. Nes^a salicifolia HBK. Santa Maria (Cameron county). 



139. Epilobinm coloratum Muhl. Chenate Mountains (Presidio county). 



