182 Plante Lindheimeriane. 
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. rracrans (sp. nov.): fruticosa, erecta, glaberri- 
ma; aculeis infrastipularibus solitariis subrecurvis ; petiolis in- 
ermibus gracilibus ; pinnis 1 — 3-jugis (in ramis floridis seepis- 
sime unijugis) ; foliolis 5 —6-jugis lineari-oblongis ; pedunculis 
axillaribus szepius 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, 
Pl. Fendl. (which much resembles M. depauperata, Benth.) 
of which I think I have a Texan specimen from Mr. Wright; 
but the pinne 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 On the Rio Grande, Texas, Mr. Wright gathered specimens of the subjoined 
species of the section Habbasia, § Rubicaules, Benth. 
Mimosa MALACOPHYLLA (sp. nov-): suffrutescens, pube mollissima undique seri- 
ceo-tomentosa; caulibus procumbentibus angulatis petiolisque copiosissime aculea- 
tis, aculeis brevibus uncinato-retrorsis ; pinnis 4-7-jugis ; foliolis 5 - 8-jugis ovatis 
