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PLANT^ WRIGHTIANiE 



67 



valvulis 



duli 



Folia ramoi 



berulo, pinnis 4 



■J 



Eamuli tenues rigidi, novelli vix mini 

 n sterilium vegetiora, petioli communi 

 ugis ; ramorum florentium glabra, peti 



puberul 



pollicari pu 



excedente, pinnis plerisque bijugis. Pinnse 4-6 lin. longse; foliola 



excedunt. Pedunculi solitarii vel cum foliis fasciculati 

 lum parvum, florens cum staminibus 4 lin. diametro. 

 Flores 5-meri, rarius 4-meri. Calyx membranaceus 



9 lin. longum. 

 iteee alabastro br 



hneam 

 Capitu- 



breviter dentatus 



Petala calyce triplo long 



alte connata. Legumen stipitatum, rectiusculum vel 



falcatum, 2-5 poll. longum, H-2 



latum, inter semina constrictum. suturis 



leviter incrassj 

 Benth. in litt 



This is the only American Medih 



Prairies, near the 



fruit 

 of L 



of the San Felipe 



in flower and 



Pass of the Limpia, Aug. ; in 



L. Sand-hills 50 miles below El Paso : Jornada del 



fruit (No. 162). Abundant in thc collection 



Chihuahua. common 



Wislizenus (flowers exhaling the fragrance of orange-bl 



soms). Near Mier, Castanuela, and Buena Vista, Gregg. 

 Stipular spines on the flowering branches from 3 to 6 lin< 

 merous flowering specimens gathered by Mr. Wright during the past ycar h 



Shrub 5 to 8 feet high 

 on2r. Most of the nu- 



only the branchlets but the foliage glut 

 which they were dried. 



A. Farnesiana, JViUd. Common 



they adhere to the paper 



West 



Texas and Northern Mcxico 



One of Greggs specimens is referred by Mr. Bentham to the nearly alUed A- Ca- 

 venia, and Lindheimer has a flowering specimen, with very small leaflets, which 

 might also be so referred.* 



ROSACE^. 



181. Prunus rivularis, Scheele in Linncea^ 2L p. 594; verging to P. Ameri- 

 cana. Along the Leona River, June ; in fruit — Lindheimer remarks, that it more 

 commonly grows on declivities than along the banks of streams. 



LeucEena glauca is in Gregg^s North-Mexican collection, from near Rinconada, whercj as well as in 

 other localities, he also gathered the foUowing remarkable Pithccolobium : 



'' PiTHECoLOBiuM BREviFOLluM (sp, nov, Samanca stipuUs spinescentibus!) : ramuUs inflorescentia fo- 

 liisque junioribus puberuUs ; stipulis subulatis plerisque spinescentibus ; pinnis 3- 5-jugis; foUoUs 10-20- 

 jugis oblongo-Unearibus subtus paUidis ; panicula foliosa ; floribus cano-puberuUs ; coroUa calyce plus tri- 

 plo longiore ; ovario stipitato glabriusculo ; legumine recto glabro, valvulis haud coalltis." Benth in litL 



Wisl 



East of Rinconada and Papagallo ; also between Cerralvo and Maria, Gregg. 



u 



This species in its 



straight pod, not curled or twisted as in most Pithecolobla, and general charactcr, is alUed to P, fragrans 

 and P. Berterianum ; but it appears to be a shrub, not a tree ; the pinnie and leaflets are very much fewer ; 

 the pod is thinner and drier, although the valves are of a reddish hue inside, and show signs of a dried-up 

 thin pulp, as in all species of Pithecolobium ; and, above ali, the stipules are generally perslstent in the 

 form of straight spines from 2 to 4 [and even 6] Unes long, which is not known to be the case in any oth- 

 er species of the section Samanea. The leaflets are from 2 to 3 lines long, very much like ihose of R 

 fragrans. The inflorescence is but imperfectly developed in the specimens gathered, but appears to be 



the same as that of P. fragrans." Benfh. in liit. 



Schrankia platycarpa, Gray, PL Lindh. 2, p. 183, In Lindheimer's coUection of 1849, has the broadly 

 Unear and flat pods aculeate on the thickened margins, and along the middle of the valves, the rest of the 

 face naked^ 



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