4 



I 



t 



VI. 



^LAKT^ WRIGHTIAN^. 



69 



base, except the floral ones. Stipular sheatlis bcaring 5 to 7 seta; on eadi side ; 

 these are beset, especially those of the upper and floral leaves, with strong bristles. 

 Head rather few-fiowered. Bracteal stipular setoe strongly setose with long hispid 

 hairs. Ovary didymous, ncarly glabrous. Lobes of the calyx four, equal (or some- 

 times twQ of them very short), and with as many small interposed teeth, hispid-cihate 

 towards the base. Corolla slender, only two lines long. Mature fruit not secn. 



DioDiA TERES, Waft. / Torv. §• Graj/ ; var. 1 parvula ; caule subsimplici crccti- 

 nsculo ; foliis anguste linearibus acutissirais. — Mountain valleys betwccn the San 

 Pedro and Santa Cruz, Sonora ; Sept. (1122.) — The specimens are small, from 2 

 to 6 inches high, from an annual root, nearly erect, and resemble the narrowcst- 

 leaved forms from New Jersey, rather than the plant of the Southern States. 



COMPOSIT^. 



Vernonia Jamesii, Torr. Sf Grai/^ Fl 2. p. 58. Valley of the Limpio and Rain- 

 water Creek; June. — The form with smaller heads. (1391.) 



V. LiNDHEiMERi, Grtt^ %" Engelm. Fl. Lindh. 2, p. 217. Pcbbly bed of the San 

 Pedro, Western Texas ; July. (1392.) 



; PROSTRATA, Cav. ; Graj/, Fl. Wrlght. p. 83. Rocky hills, between the 



Pecti 



copper mines and Conde's Camp, New Mexico, Aug. ; and near Santa Cruz, Sonora, 

 Sept. A dwarf variety, like Wrighfs No. 245. (1123.) 



P. (Pectidopsis) angustifolia, Torr.; Grai/, Fl. Fendl. p. 61, 8f Fl. Wright. l. c. 

 Stony hills near the copper mines, New Mexico ; Aug. (1124:.) — The original 

 form of the spccies, without any awns to the pappus. 



P. (Pectidopsis) filipes, Ilarv. ^ Gray^ Fl. Fendl. p. 62. Stony hills of Copper- 

 mine Creek, New Mexico; Aug. (1125.) — A low, divergently much-branchcd 

 plant, with the capillary pedunclcs from 12 to 18 lines long: exactly like No. 329 

 of Coulter's Californian Collection, except that the pappus of the disk-flowers is 

 commonly one-awned. P. uniaristata, DC. is described as having mucronate-aristate 

 leaves, and the scales of the involucre acuminate. 



P. (Pectothrix) papposa, Ilarv. %• Graj/, l. c. Sandy soil, at Dona Ana, Ncw 

 Mexico; July. (1126.) — " Divaricately much-branched from the root, procum- 

 bent." I have raised this from seed in the Cambridge Botanic Garden. Its pros- 

 trate, divergently-branched stcms extend to a foot in length ; its leaves are often 2 

 inchcs or more in length, barely a line wide, rather fleshy ; the pcduncles about an 



inch long. Involucre 3 lines long ; the golden-yellow ligules (8) about the same 

 length. The pappus of the ray is very short, somcwhat auriculate or coroniform, 

 sometimes nearly obsolete. — In a single wild specimen, intermixcd with the otliers, 

 the pappus is rcduced to sctae very much shorter than the tube of the corolla, and 

 more or less coroniform-concreted ; otherwise it is nndistinguishable from the rest 



of the specimens. 



P. (Pectothrix) longipes (sp. nov.): herbacea, glabra; caulibus brevibus 

 ramosissimis dccumbcntibus ; foliis lincaribus mucronatis secus margincs grosse 

 glandulosis basi ciliis utrinquc 1-3 instructis ; peduuculis pitelongis ; involucri 

 multiflori squamis 12-13 uniglandulosis ; pappo radii biaristato, disci multisetoso. 



pl. wr. — 10. 



