

f 



434 



BOTANICAL GAZETTE 



[JUNE 



abundantly 



to the white margin and crown, about i cm long, the slender incurved 

 awns fully one- third as long and wholly free from and surpassing the 

 hair on the achene: glandular waxlike particles occur 

 on the flowers and free tip of the chaff. 



Las Vegas, Nevada, May 4, 1905, Goodding 2271. 



Chaenactis paleolifera, n. sp — Biennial or possibly perennial: 

 the tap root with an enlarged indurated crown bearing few to several 

 freely branched stems, i-5-3 dm high: leaves numerous, pinnately 

 parted into few to several mostly short linear entire segments, canes- 

 cently tomentulose as are also the stems and involucres: heads 

 numerous, terminating the branchlets, naked pedunculate, i2-i5 mm 



40-60 



involucral bracts linear-lanceolate, 



with numerous (as many as 



slightly acuminate: receptacle convex, with numerous (as 

 the flowers?) paleae; these linear, clavellate-acuminate above, and 

 minutely glandular-pubescent, as are also the corollas, which exceed 

 the paleae but little: corollas ochroleucous, essentially alike; their 

 tubes a little shorter than the slightly enlarged throat: stamens 

 included: stigmas exserted: pappus paleae 4, usually lance-acuminate 

 and as long as the corolla-tube, sometimes shorter and obtuse, or 

 slightly lacerate : achenes linear, slightly enlarged upward, and nearly 

 terete, softly pubescent. 



Tuly's ranch, 13 miles north of Las Vegas, Nevada, May 10, 1905, Goodding 



2344- 



Only two other species are accredited with paleae, C. carpoclinia and C 



attenuata Gray, with 10 and 5 paleae respectively. These, apart from the differ- 

 ences in the number of paleae, cannot be confused with the species here proposed. 



Lebetina Cass, in Diet. Sc. Nat. 25:394. 1822.— Among the 

 several names to which the following species have been referred, 

 Lebetina seems to be the earliest and the only one proposed especially 

 for any of them. Dysodia, as at present constituted, includes most 

 diverse things, and in the section Eudysodia extreme incongruity 

 seems to have been reached (see Gray, Proc. Am. Acad. 19:37- l8 ^' 

 Hoffmann, Engler & Prantl, Pflanzenfam. 4 s : 266. 1890). Hoff- 

 mann- assigns the first of the following to a section by itself, but had he 

 added the other species the section would still have been fairly homo- 

 geneous and would have relieved the section Eudysodia. To think ot 

 Dysodia papposa and D. Cooperi Gray as congeneric stretches one s 











