"^I- PLANTS WRIGIITIAN^. gl 



capillary, soft, all alike except in length. — This plant destroys the genus Ericame- 

 ria, Nutt, which, as a section of Aplopappus, forms another point of connection 

 between that genus and Linosyris ; Ericameria resinosa, Nutt, being nearly un- 

 distinguishable from Linosyris viscidiflora, except in having from two to sLx rays. 



A. (Blepharodon) spinuloses, DC. Prairies, &c. from Zoquete Creek, Texas, 

 to New Mexico. (1189.) Also, the nearly glabrous variety, from New Mexico, and 

 a valley west of the Chiricahui Mountains, Sonora. (1190.) 



A. GRACILIS, Gray, PI Fendl. j). 76, Sf PL Wri(jhf. p. 97. Valley of the Rio 

 Grande, New Mexico, and near the San Pedro, Sonora ; Sept. (1191.) 



Chrysopsis foliosa, Nutt, var. PI. Wright no. 299. p. 99. Hills, near the 

 Mimbres, New Mexico ; Nov. 



C. FOLiosA, var. sericeo-villosissima, iucana ; capitulis quam in pi. Nutt. majori- 

 bus ; ligulis elongatis. — Valley between the San Pedro and the Sonoita, Sonora ; 

 Sept. — Heads half an inch long, bracteate with leaves. Exterior pappus very 

 manifest, as in all the forms of this species ; the short setae rather than squamellae 

 often half the length of the achenium. 



Grindelia argvt a, Schrad. in DC. ? forma glabra. Sonora^ (the locality not 

 recorded). 



G. squarrosa, Dunal, fere var. grandiflora. Gray, PL Wright, p. 98. Prairies 

 on the Manzanal, Western Texas ; July. 



Laphamia (Pappothrix) RDPESTRis, Gray, PL Wright, p. 100. t. 9. Crevices 

 of basaltic rocks, on mountains of the Limpio ; June. (1192.) 



L. halimifolia, Gray, L c. Hills of the San Pedro, Western Texas ; May- 

 (1193.) 



L. A^"GusTIFOLIA, Gray, L c. High, rocky hills of the Pecos; June. (1194:.)* 



PERICOME, Nov. Gen. 



Capitulum multiflorum, homogamum. Involucrum disco brevius, campanulatum, 

 uniseriale ; squamis circ. 20 linearibus per margines angustissimos hyalines inter se 

 coalitis. Receptaculum planiusculum nudum. Flores omnes hermaphroditi. Co- 

 roUse tubulosse, tubo gracili viscoso-glanduloso, fauce cylindracea, dentibus 4 ovatis 

 patentibus. Antherse exsertse, basi subsagittatae. Styli rami filiformes, leviter com- 

 planati, obtusiusculi, extus superne et apice minute hirtelli. Aclienia lincari-ob- 

 longa, compressa, faciebus glaberrima, niarginibus nerviformibus undique barbato- 



* Dr. Torrey lias furnished tlie characters of the subjoined new species of Laphamia, which is remark- 

 able, both for its finely dissected foliage, and for having a pappus of a single seta in some flowers, in 

 others none at all ; — thus confirming the union of Monothrix, Tiirr. with Laphamia vera. 



"Laphamia dissecta (sp. nov.) : nana, patenti-pubcscens ; caulibus c basi ramosis ; ramis foliosis 

 monocephalis ; foliis plerumque alternis subrotundo-cordatis pedato-multisectis, scgmentis oblongo-lineari- 

 bus confertis ; ligulis nuUis ; fl. disci circitcr 20 ; pappo e seta unica corolla; tubum sequante vel saepius 

 nullo. — Crevices of rocks, on mountains, near Presidio del Norte, Aug., 18.52, Dr. J. M. Bigclow. — 

 Stems 3 or 4 inches high, lignescent at the base ; the numerous branches mostly simple. Leaves scarce- 

 ly one third of an inch long, cut into numerous minute and crowded segments. Heads 4 or 5 fines m 

 diameter. Scales of the involucre about 15. Achenia hispid on the margins, blackish when mature." 

 Torrey, Mss. 



