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PLANTJE WRIGHTIAN-E. 



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

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

 gum, 8-9 lin. latum." Be7ifh. in litt — Prairies west of St. Antonio, and on the 

 Kio Grande, Texas, June; in flower and fruit. Also in the coUection 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 othcr Af- 

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



among the Giimmiferce ; 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-(saipius 2-) 

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

 trinervatis petiolisque minute pubescentibus mox glabratis ; spicis cyHndricis elon- 

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



cato acuminato plano membranaceo 



glabro. 



Western Texas; coll. of 1851; in 



flow^er and with young fruit. (Dry valley west of Patos, Northern Mexico, April, 



Gregg.) 



A small tree, 10 or 20 fcet high, with white [cream-colored ]] flowers, ac- 



cording to Dr. Gregg. It much resembles A. W^rightii, and has the same inflorcs- 

 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 

 Wrighfs specimens, the spikes (12-18 Hnes 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 



pinnse 3-6 lines long ; a petiolar gland below the lower pair. 



3-5 



lines long: 



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



174. A. RiGiDULA, Beuth. in Lond. Jour. Bot. l. p. 504. Pocky hills near Tur- 

 key Creek, Western Texas, June ; in flower only. — 



"Shrub4 to 6fcethigh."» 



+ 

 + 



A. RcEMERiANA, Sckeele in LinjKEa, 21. p. 456; Grai/, Pl. Lindh. 2. p. 185. 



Western Texas ; coll. of 1851, in fruit. 



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

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

 la depressa; foHoIis 25-45-jugis oblongo-Iinearibus insequilateris acutiusculis vel 



stipulis semicordatis acuminatis; pe- 



duncuHs axillaribus et subpaniculatis ; capitulis dense multifloris; calyce coroUa 

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

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

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

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



mucronulatis glabellis viridibus venulosis; 



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



ralvo and Monterey; and in Dr. 



both 



The 



oody 



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



When 



lar-ovoid, and over half an inch in their longer diameter. 



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



feet high- 



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