T. 



PLANTJE WRIGHTIAN^. 65 



ceus, glaber. Petala spathulata, ima basi subconnata, margine tenuissime lanato- 

 ciliolata, calyce duplo longiora. Legumen stipitatum, subfalcatum, 2-3 poll. Ion- 

 gum, 8-9 lin. latum." Benth. in litt. — Prairies west of St. Antonio, and on the 

 Rio Grande, Texas, June; in flower and fruit. Also in the collection of 1851, 

 from Western Texas. (Near Ojito, Northern Mexico, Gregg.) — A small, much- 

 branched tree ; the flowering branches loaded with slender and graceful spikes. 

 According to Mr. Bentham, the species much resembles A. hamulosa and other Af- 

 rican species among the Ataxacanthee, as well as A. rigidula and A, amentacea 

 among the Gummifera ; but there is no vestige of any thorns or prickles. 



X A. Greggii (sp. nov. Vulgares Ataxacanthae) : glabella ; ramis virgatis ; acu- 

 leis paucis sparsis recurvis ; stipulis minutis obsoletisve ; pinnis 1 - 3-(s8epius 2-) 

 jugis ; foliolis parvis 3-7-jugis obovato-oblongis subobliquis crassiusculis sub- 

 trinervatis petiolisque minute pubescentibus mox glabratis ; spicis cylindricis elon- 

 gatis folia duplo superantibus ; floribus subsessilibus ; legumine lato-lineari subfal- 

 cato acumiuato piano membranaceo glabro. — Western Texas; coll. of 1851; in 

 flower and with young fruit. (Dry valley west of Patos, Northern Mexico, April, 

 Gregg.) — A small tree, 10 or 20 feet high, with white [cream-colored ]] flowers, ac- 

 cording to Dr. Gregg. It much resembles A. Wrightii, and has the same inflores- 

 cence ; but the branches are sparingly armed with solitary and rather stout recurved 

 prickles, the leaves are not half as large, and are minutely pubescent, at least in 

 Wright's specimens, the spikes (12-18 lines long) are denser, and the young pods 

 (2 or 3 inches long and 5 or 6 lines wide) taper to an acute point. Common petiole 

 3-5 lines long: pinna; 3-6 lines long; a petiolar gland below the lower pair. 

 Leaflets not more than a line and a half in length, pale, rather crowded. 



174. A. RIGIDULA, Benth. in Lond. Jour. Bot. \. p. 504. Rocky hills near Tur- 

 key Creek, Western Texas, June ; in flower only. — " Shrub 4 to 6 feet high." * 



+ A. RcEMERiANA, SchecU in Linnaa, 21. p. 456; Grag, PL Lindh. 2. p. 185. 

 Western Texas; coll. of 1851, in fruit. 



175, 176. A. TEPHROLOBA (sp. nov. Vulgares Pennatse) : aculeis sparsis raris vel 

 nullis ; ramis petiolis pedunculisque cinereo-puberulis ; pinnis 5 - 9-jugis, glandu- 

 la depressa; foliolis 25-45-jugis oblongo-linearibus insequilateris acutiusculis vel 

 mucronulatis glabellis viridibus venulosis ; stipulis semicordatis acuminatis ; pe- 

 dunculis axillaribus et subpaniculatis ; capitulis dense multifloris; calyce corolla 

 breviore ; legumine piano lato-lineari rectiusculo obtuso basi in stipitem angustato 

 pube brevissima moUissima velutino-canescente. — Hills of the San Pedro River, 

 Nov., in flower ; and on the Rio Seco, Western Texas, June, in fruit. Also in the 

 collection of 1851. Mier, on the Mexican side of the Rio Grande, Wislizenus, No. 



* Acacia flexicaulis, Benth., occurs with full-grown pods in the collection of Dr. Wislizenus from Cer- 

 ralvo and Monterey ; and in Dr. Gregg's from Camargo and Monterey, both in flower and fruit. The 

 pods are 3 or 4 inches long, an inch wide, falcate, exceedingly thick and convex, almost woody, and di- 

 vided between the seeds by false partitions of thick dry pulp, as in A. Farnesiana. The seeds are globu- 

 lar-ovoid, and over half an inch in their longer diameter. When green they are cooked and eaten, and 

 when dry they are used as a substitute for coffee, according to Dr. Gregg. It forms a tree, from 20 to 30 

 feet high. 



