64 ^ PLANT-S; WRIGHTIAN^. V. 



legume is sharp-pointed. The leaflets are ciliolate, otherwise glabrous. The very 

 rigid and thick pod is like that of D. velutinus (which is in Wright's collection of 

 1851 from the same region), of which it is most likely only a smooth variety. 



170, 111. "Leuc^na retusa (sp. nov.): subglabra; pinnis 2-5-jugis; foliolis 

 6 - 8-jugis oblique obovatis vel late oblongis obtusis retusisve membranaceis veno- 

 sis ; pedunculis capitulo longioribus ; legumine subcoriaceo, marginibus incrassatis. 

 — Gemmae et folia novella pube tenui flavescunt ; ramuli et folia adulta glabra sunt. 

 Stipulse membranacese, puberulse, basi obliquae et latse, in acumen subulatum 2-3 

 lin. longum desinentes. Petioli tenues, communis 3-4 poll, longi, partiales vix 

 breviores. Glandulse parvse, elevatae, fere stipitatse. Foliola plerseque 8-10 lin. 

 longa, 4-6 lin. lata, nonnuUa fere dimidio minora, basi valde obliqua, laete-viren- 

 tia, 3 - 5-nervia et reticulato-venosa. Pedunculi floriferi poUicares, fructiferi bipoUi- 

 cares. Capitulum fere L. glaucEe. Bractese stipitatee ; lamina peltata, ovata, subu- 

 lato-acuminata, supra villosa. Calyx l-y lin. longus, tubulosus, membranaceus, 

 apice breviter 5-dentatus. Petala anguste oblonga, calycem paulo superantia. 

 Stamina 10; antheris glabris. Legumen 6-9 poll, longum, 6 lin. latum, rigidius 

 et crassius marginatum quam in L. glauca. — The general appearance of the foli- 

 age of this species is that of some Albizziae allied to A. Milleti." Benth. in litt. — 

 Bottom of the Rio Nueces, June, in flower; and Pass of the Limpia, Aug., in 

 fruit. Also in the collection of 1851. 



172. " Acacia malacophylla (sp. nov. Vulgares Pennatse) : subscandens 1 molli- 

 ter pubescens; aculeis subrecurvis sparsis raris ; pinnis 2-3-jugis obliquis obovatis 

 oblongisve obtusis utrinque molliter pubescentibus ; capitulis globosis ; legumine 

 lato-lineari glabro. — Hamuli et folia pube moUi undique canescentia. Petioli com- 

 munes tenues, 2 - 3-pollicares ; partiales breviores. Foliola 3-6 lin. longa, obscure 

 venosa. Pedunculus fructifer saepius pollicaris. Legumen 4 poll, longum, 9 lin. 

 latum, falcatum, basi acutum et breviter stipitatum, planum, tenuiter subcoriaceum, 

 margine leviter incrassato." Benth in litt. — Uplands of the Leona, Western Tex- 

 as, June ; in fruit. Near Cerralvo, Northern Mexico, May (in fruit), Wislizenus 

 (No. 363), whose specimen is more aculeate, some of the rameal aculei geminate. 

 Notwithstanding the specimens are in fruit only, Mr. Bentham remarks, that the re- 

 mains of the flower at the base of the pod leave no doubt as to the genus and af- 

 finities of the plant, although it is so very distinct a species in the group to which 

 it belongs. 



173. "A. Wrightii (sp. nov. Vulgares Nudiflorse): glabra, inermis; stipulis 

 minutis obsoletisve ; pinnis 1-2-jugis; foliolis 2- 4-jugis oblique obovatis oblon- 

 gisve obtusis vel retusis ; spicis elongatis laxis ; floribus breviter pedicellatis ; legu- 

 mine lato-lineari obtuso piano membranaceo marginato glabro. — Ramuli albidi. 

 Folia subfasciculati : petiolo communi 2-6 lin. longo, partialibus 4-6 lin. Glan- 

 dula3 parvse convexfe. Stipellse minimse ad basin pinnarum. Foliola rigidula, 2-3- 

 nervia; ultima 3-5 lin. longa, 2-3 lin. lata, fere dimidiata; inferiora sfepius mi- 

 nora. Pedunculi sesqui - bipollicares, jam infra medium interrupte floriferi. Brac- 

 tese minutse. Pedicelli calyce breviores. Flores cum staminibus fere 3 lin. longi, 

 absque staminibus linea vix breviores, pentameri. Calyx semi-5-fidus, membrana- 



