"^I- PLANTS WRIGHTIANjE. 97 



A. ODOR ATA, Gray, PI. Fendl I. c, Sf PI Wright, p. 122. Along the Rio Grande 

 near El Paso ; May, in flower ; July, in fruit. (1201.) 



A. SCAPOSA, Nuft. ; Ton: S,' Gray, Fl. 2. ^j. 382 : the villous form. Stony prai- 

 ries, near Rock Creek and Escondido Springs ; June. (1262.) 



A. LiNEARiFOLiA, Torr. 8f Gray, I. c. Rocky hills along the Pecos, and at Es- 

 condido Springs ; June. (1263.) 



A. LINEARIFOLIA, var. caule elatiore (ultrapedali) strictiore. — Prairies of the 

 Leona, Western Texas ; May. (1264.) 



Htjienothrix Wislizeni, Gray, PI. Fendl p. 102, adnot. Valley of the Sierra 

 de los Animos, south of the copper mines, New Mexico; Oct. (1265.) "Also 

 common in Sonora." — The specimens well accord with that of Wislis^enus. I think 

 the root is perennial. The disk-corollas are moderately 5-lobed ; the anthers partly 

 exserted, and yellow, like the flowers. The achenia are 4-5-angled, and minutely 

 hairy. The pappus is correctly described in PI Fendl. I. c, except that the paleate 

 portion is mostly rather longer than the awn. — The following plant, with the in- 

 volucre and pappus of Hymenothrix, might well claim the rank of a genus, on 

 account of its rayless capitula, with the limb of the corolla parted to the base. 



H. ? Wrightii (sp. nov.) : floribus purpurascentibus ; ligulis nullis ; corollis fl. 

 hermaphroditis limbo 5-partito, lobis oblongo-linearibus ; acheniis villosis ; paleis 

 pappi 15 -18 lanceolatis nervo valido in aristam breviusculum desinente; foliis in- 

 ferioribus 2- 3-ternatisectis, superioribus trisectis segmentis lineari-filiformibus in- 

 tegerrimis. — On hills between the Barbocomori and Santa Cruz, and on the side 

 of the Chiricahui Mountains, Sonora; Sept. (1266.) — Root perennial. Stems 

 glabrous, rigid, corymbosely branched, 2 or 3 feet high. Lower leaves biternately 

 divided and more or less hirsute ; the others glabrous : segments of the upper 

 leaves an inch or more in length, and less than a line in width. Peduncles or 

 branches of the loose corymb glandular, or entirely glabrous. Heads 4 or 5 lines 

 in length, about 30-flowered. Involucre shorter than the disk, glabrous, biserial ; 

 the exterior scales 4 or 5, linear and smaller; the inner about 7, obovate or oblong, 

 partly scarious, tinged with purple. Corolla pale purple ; the limb 5-parted nearly 

 to the summit of the glandular tube ; the lobes oblong-linear, spreading, a line and 

 a half in length, equal, or in some of the marginal flowers more or less irregular 

 from the partial union of two of the lobes. Anthers purple, wholly exserted, 

 tipped with an ovate appendage, bidentate at the base. Branches of the style flat, 

 linear, like those of H. Wislizeni, except that the conical appendage is subulate- 

 pointed. Receptacle small and nearly flat, tuberculate, naked. Achenia quadrangu- 

 lar, tapering to the base, villous. Puppus rather longer than the achenia, shorter than 



linearibus rigidis integerrimis paucisve caulinis frilobis ; involucri squamis oblongo-lanccolatis acuminatis, 

 interioribus acuminatissimis inferne scarioso-marginatis ; pappi paleis lanceolatis sensim aristato-acumi- 

 natissimis (nervo evanido) corollam disci suba;quantibus. — On mountains near the copper mines, and 

 near the Mimbres, New Mexico ; April, June. — Stems slender, 8 to 12 inches high. Radical leaves 

 csespitose, 2 to 3 inches long, barely a line wide, the cauline several on the lower half of the stem, 

 similar, or some of the larger ones furnished with a short lobe on each side above the middle. Head and 

 ligules nearly as large as those of A. argentea. Paleae of the pappus 3 lines long. 



