I 



t 



VI. 



PLA^^TiE WRIGHTIAN^. 



81 



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 conncctior 

 between that genus and Linosyris; Ericameria resinosa, Nutt, 

 distinguishable from Linosyris viscidiflora, except in having from 



being neaily 



A. (B 



DC. Prairies, &c. from Zoquete Creck. Texas 



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

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



A. GRACiLis, Graj/, Pl Fendl p. 76, 8," Pl. WrirfhL p. 97. Valley of the Eio 

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



Chrysopsis foliosa, Nutt., var. Pl. Wright no. 299. p. 99. Hiils, near the 

 Mimbres, New Mexico ; Nov. 



C. FOLiosA, var. sericeo-villosissima, incana ; capitulis quam in pl. Nutt. majori- 

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

 Sept. — Heads lialf an inch long, bracteate with lcaves. Exterior pappus vcry 

 manifest, as in all the forms of this species ; the short seta) rather than squamellre 

 often half the length of the achenium. 



Grindelia arguta, Schrad. in DC? forma glabra. Sonora? (the locaUty not 

 recorded). 



G. SQUARROSA, Duualy fere var. grandiflora, Gray^ Pl. Wright p. 98. Prairies 

 on the Manzanal, Western Texas ; July. 



Laphamia (Pappothrix) RUPESTRis, Gvay, 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. ANGUSTiFOLiA, Grat/, l. c. High, rocky hills of the Pecos ; June. (1194.)* 



PERICOME, Nov. Gen. 



Capitulum multiflorum, homogamum. Invohicrum disco brevius, campanulatum, 

 uniseriale ; squamis circ. 20 linearibus per margines angustissimos hyalinos intcr se 

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



tubulosse, tubo gracili viscoso-glanduloso, fauce 



dentibus 4 



patentibus. Antherae exsertse, basi subsagittatoe. Styli rami filiformes, lcviter com 

 planati, obtusiusculi, extus superne et apice minute hirtelli. Achenia 

 longa, compressa, faciebus glaberrima, marginibus nerviformibus undiqi 



lineari-ob- 

 barbato- 



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

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

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



^' Laphamia DissECTA (sp. nov.) : nana, patenti-pubescens ; caulibus e basi ramosis ; rainis foliosis 

 monoccphalis ; foliis plerumque ahernis subrotundo-cordatis peJato-multisectis, segmentis oblongo-Iineari- 

 bus confertis ; ligulis nullis ; fl. disci circiter 20 ; pappo e seta unica corollse tubum aquante vel saepiaa 

 nuUo. — Crevices of rocks, on mountains, near Presidio del Norte, Aug., 1852, Dr. J, M. Bigclow. 

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

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

 diametcr. Scales of ihe involucre about 15. Achenia hispid on the margins, bkickish when mature." 

 Torrey^ Mss. 



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