■^I- PLANTS ■VVRIGHTIANJE. 87 



papulosis, disci prismaticis areola acute quadrata. — Hill-sides, between Barboco- 

 mori and Santa Cruz, Sonora ; Sept. (1218.)— Stem 12 to 18 inches high, very 

 slender, branched. Leaves barely an inch long, 3 to 5 lines wide at the base, which 

 is abruptly contracted into a petiole of 3 or 4 lines in length, mostly obtuse and 

 entire, except near the base. Peduncles 4 to 6 inches long ; the apex more or less 

 enlarged and hollow. Involucre 4 lines in diameter. Ligules deep yellow, oblong, 

 half an inch in length, three-toothed at the broad apex. Achenia of the disk acutefy 

 quadrangular, the apex square and exactly truncate, with the angles sharp. Ligules 

 persistent, but withering with age. 



Lepachys columnaris, var. Tagetes, Gray, PL Wright, p. 106. Banks of the 

 San Pedro, Western Texas ; May. (1219.) 



Heliomeris multiflora, Nutt. ; Gray, PL.Fendl p. 84, §' PI. Wright, p. 107. 

 Sides of mountains at the copper mines, New Mexico, and near the San Pedro, So- 

 nora ; Sept., Oct. : a narrow-leaved form, like Wright's No. 334. (1220.) Also 

 on pine hills between the copper mines and the Mimbres ; Oct. : a large and broad- 

 leaved form, like Wright's No. 328. (1221.) —The latter, like the former, has an 

 annual root. The larger leaves are 4 inches long and 6 or 8 lines wide. 



H. MULTIFLORA, var. HispiDA. Low, damp soil, near Santa Cruz and San Ber- 

 nardino, Sonora ; Sept. (1222.) — The leaves are linear or narrowly linear-lanceo- 

 late, and, like the stems and peduncles, either sparsely, or in young plants very 

 densely, setose-hispid. Some specimens are canescently hispid : others exhibit 

 gradations to the ordinary forms; else I should certainly have characterized the 

 plant as a new species. A cultivated specimen shows that the leaves are 

 thickish, canaliculate above, and with the large and strong midrib very prominent 

 underneath. 



H. TENUiFOLiA, Gray, I. c. Rocky hills of the San Pedro, AVestern Texas; May. 

 Near Eagle Springs ; June. (1223.) 



SiMsiA EXARiSTATA (sp. nov.) : auuua ; caule erecto superne pedunculis petiolis- 

 que pilis patentissimis hispido-villosis ; foliis ovatis sen oblongo-ovatis acuminatis 

 subserratis hirsutulis longe petiolatis, petiolis exauritis ; capitulis corymboso-pani- 

 culatis ; squamis involucri lanceolatis, exterioribus parce hispidis paullo breviori- 

 bus ; ligulis 4-7 parvis discum baud superantibus ; acheniis glaberrimis omnino 

 calvis vel obsoletissime biaristellatis. — S. lagascseformis. Gray, PI. Wright, no. 

 331, pro parte. — Valley of a tributary of the San Pedro, Sonora ; Sept. (1224.) 

 — Stem mostly slender and rather simple, one to two feet high. Leaves all un- 

 divide.d and almost entire, 2 to 4 inches long, on petioles of 1 - 2 inches in length, 

 which are not at all auriculate or dilated at the base. Heads 5 or 6 inches in 

 length : the rays very small and inconspicuous, yellow, as are the disk-flowers. 

 Palese of the receptacle mostly scarious, pointed. The achenia are like those of S. 

 subaristata. Gray, PI. FeiulL, but more rarely showing any trace whatever of pap- 

 pus. That species is canescently strigose, with deeply lobed leaves, the petioles 

 auriculate at the base, the heads larger and solitary, and the exterior scales of the 

 involucre as long as the inner, the ligules exsertcd, &c. I cannot now refer to 

 these specimens of Wright's former collection, distributed under No. 331, which 



