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PLANT^ WEIGHTIANiE. 



VI. 



y 



D. Grahami (sp. nov.) : caulibus e radice perenni ramosis procumbentibus ramis- 

 que gracilibus glabellis ; stipulis subulato-acuminatis fuscis persistentibus ; foliis 

 trifoliolatis ; foliolis ovato-rotundis ssepe retusis membranaceis minute pubescentibus 

 subtus pallidis ; racemis plerisque terminalibus demum prselongis sparsifloris ; brac- 

 teis ovatis acuminatis striatis calyceque primum hispidis deciduis ; lomento substipi- 

 tato deflexo, articulis 4-5 ovalibus inaequilateris pubero-scabris. — On mountains, 

 near the copper mines, New Mexico ; Aug. (1015.) — Stems much branched from 

 the root, procumbent or decumbent, angled, leafy. Stipules rather small, soon de- 

 flexed. Pctioles short ; the lower little longer, the upper much shorter, than the 

 rhachis, which is half an inch long. Leaflets 12 to 18 lines long by 8 to 14 wide, 

 bright green above, clothed with a fine appressed pubescence which is shorter and 

 sparse underneath. The principal terminal raceme becomes, with its peduncle, a 

 foot and a half long. Flowers in the bud imbricated with the broad bracts (which 

 are 2-3 lines long), but are soon sparse. Pedicels 3 or 4 lines long, roughish- 

 pubescent. Corolla purple, 3 or 4 lines long. Loment straight, slightly sinuate on 

 the upper side, deeply lobed on the lower ; the articles therefore inequilateral, 3 

 lines long. — A fine species, the aspect of the foliage much like that of D. DiUenii ; 

 from which the rounded leaflets, decumbent habit, larger bracts, and simple pro- 

 longed racemes, at once distinguish it. I dedicate the plant to Colonel Graham, to 

 whose staff Mr. Wright was attached when this collection was made. 



D. psilocarpum (sp. nov.) : scabro-pubescens ; caule e basi sufirutescente erecto ; 

 stipulis ex ovato longe subulatis striatis persistentibus ; foliis trifoliolatis ; foliolis 

 rhombeo-ovatis oblongisve obtusis reticulatis glabratis marginibus venisque subtus 

 hirtellis ; racemis terminalibus paniculatis multifloris ; bracteis stipulis conformibus 

 caducis ; lomentis patentibus, articulis 4-5 medio adnexis ovalibus subaequilateris 

 glaberrimis (nisi margine ciliolatis) membranaceis semine multo majoribus. — On 

 detritus of a mountain ravine, near Santa Cruz, Sonora; Sept. (1016.) — Stem 2 

 or 3 feet high, rigid, roughish with a fine hooked pubescence and some hirsute 

 hairs. Stipules conspicuous, 4-5 lines long, green. Stipels setaceous, longer than 

 the petiolules. Leaflets chartaceous, one or two inches long, or sometimes smaller, 

 of neaiiy the same hue both sides, reticulated underneath, mucronate. The flower- 

 ing racemes are probably rather dense ; the fructiferous ones are often nearly a foot 

 long, and bear a large number of pods. The late flowers at the summit of the 

 spent racemes are small, only two lines long ; the calyx-teeth subulate. Pedicels half 

 an inch long. Loment slightly stipitate, smooth and glabrous even when young, 

 except a fine pubescence on the margins ; the articles four lines long, thin, appearing 

 broadly winged around the contained seed. — This species is related to D. canescens ; 

 from which it is distinguished by its smaller and blunter leaflets, of nearly the same 

 hue both sides, by the absence of villosity on the inflorescence, &c., and by the 

 smooth loments, the two sutures of which are equally constricted. It should be 

 compared with D. stipulaceum, DC. 



D. ciNERAscENS (sp. uov.) : decumbens e radice perenni, pube molle appressa cine- 

 reum ; stipulis lineari-subulatis fuscis deciduis ; foliis trifoliolatis ; foliolis elliptico- 

 oblongis obtusis parallele penninerviis utrinque sericeo-pubescentibus pallidis subtus 



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