182 Plantcc Lindheimeriana. 



of pubescence, except a mere trace under the lens, and in 

 the spinescent stipules. The valves of the pod somewhat 

 incline tobreak transversely into pieces. 



(606.) M. fragrans (sp. nov.) : fruticosa, erecta, glaberri- 

 ma ; aculeis infrastipularibus solitariis subrecurvis ; petiolis in- 

 ermibus gracilibus ; pinnis 1 -3-jugis (in ramis floridis saepis- 

 sime unijugis) ; foliolis 5 — 6-jugis lineari-oblongis ; pedunculis 

 axillaribus soepius fasciculatis folio sequalibus capitulum glo- 

 bosum gerentibus ; floribus 5-meris 10-andris glabris ; petalis 

 liberis calyce parvo quadruplo longioribus ; legumine lineari 

 falcato 6 - 8-articulato membranaceo glaberrimo inermi, rari- 

 usve margine aculeis 1— 3 armato. — Rocky soil, on the 

 Pierdenales. April, in flower (606) ; May, with immature 

 fruit (607). (Also gathered near Austin by Mr. Wright). — 

 " Shrub 3 or 4 feet high, covered at the season of blossoming 

 with the heads of light purplish-red, fragrant flowers." 

 Aculei short and stout. Leaflets rather thin, not crowded as 

 in the preceding species, rather sparse on the sterile branches, 

 where they are two lines long ; on the flowering branches 

 smaller. Peduncles nearly an inch in length, larger than the 

 head. The unripe pods are two inches long ; strongly fal- 

 cate, the margins sinuate so that the joints are well defined, 

 and the transverse lines at which the valves will separate are 

 already evident. — This species is allied to M. borealis, Gray, 

 PI. Fendl. (which much resembles M. depauperata, Benih.) 

 of which I think I have a Texan specimen from Mr. Wright; 

 but the pinnae are much longer, with more numerous and 

 narrower leaflets, and the pods are different. It is perhaps 

 the same as a North Mexican species of Dr. Gregg, indicated 

 by Mr. Bentham (in Herb. Torr.) as " Mimosa, n. sp. near M. 

 terniflora," a species which I do not find anywhere enume- 

 rated. 1 



1 On the Rio Grande, Texas, Mr. Wright gathered specimens of the suhjoined 

 species of the section Habbasia, § Rubicaulcs, Benth. 



Mimosa malacophylla (sp. nov-): sufFrutescens, puhe mollissima undique seri- 

 ceo-tomentosa; caulibus procumbentibus angulatis petiolisque copiosissime aculea- 

 tis, aculeis brevibus uncinato-retrorsis ; pinnis 4 - 7-jugis ; foliolis 5 - S-jugis ovatis 



