94. UNITED STATES AND MEXICAN BOUNDARY. d 
^  PonoPHYLLUM MACROCEPHALUM, DC. Prodr. 5, p. 648. Sonora, on the Sonoita; Wright. Near 
Santa Cruz; Thurber. 
POROPHYLLUM GREGGII, Gray, Pl. Wright, 1, p. 120. Dry hills, etc., southern part of New‏ ص 
Mexico and adjacent districts in Chihuahua; Wright, Bigelow, Captain Smith. On the Colorado‏ 
of the West ; Schott.‏ 
= PoropHyLium SCOPARIUM, Gray, l. c. Оп the San Pedro and Puercos, El Paso, etc.; Wright, 
Bigelow, Thurber. 
AGASSIZIA SUAVIS, Gray & Engelm. Pl. Lindh. 2, p. 229. Gravelly hills, southern and western 
Texas, on Rock creek, etc.; Parry, Bigelow. 
_-~ GAILLARDIA PINNATIFIDA, Torr. Common from Rock creek, the Pecos, etc., to El Paso, Cobre, | 
etc., New Mexico. | 
| 
GAILLARDIA PULCHELLA, Foug.; Torr. & Gray, l. c. Common from Texas to Sonora. 
GAILLARDIA LANCEOLATA, Michæ. Eastern Texas, on the coast ; Schott. 
PALAFOXIA LINEARIS, Lag.; DC. Prodr. 5, p. 124. Diluvial banks of the Colorado, Sonora ; 
Schott. Fort Yuma, California ; Major Thomas. Chihuahua, east of Rio Santa Maria ; Schott. 
PALAFOxIA HOOKERIANA, Torr. & Gray, Fl. 2, р. 368. Valley of the Rio Grande below San 
Elizario ; Wright, Bigelow. Sand hills, Medanos ; Thurber. 
Pataroxta TEXANA, DC. Prodr. 5, p. 125. Texas from San Antonio to Eagle Pass. Los | 
Moros, New Mexico ; Bigelow. >, | 
PALAFOXIA CALLOSA, Torr. & Gray, 1. c. From the Guadalupe river, Texas, to the Pecos. | 
一 一 FLoRESTINA TRIPTERIS, DC. Prodr. 5, p. 655. On the Pecos, Escondido, etc.; Bigelow, Wright, | 
Parry. | 
CHANACTIS TENUIFOLIA, JVutt.; Torr. & Gray, Fl. 2, p. 370. San Diego, California; Thurber, | 
(a pretty large plant, a foot high,) Schott, (a small form, only 3 or 4 inches high.) 
CHÆNACTIS STEVIOIDES, Hook. & Arn.; Gray, РІ. Wright. 2, p. 94. Hills, near Camp Fillmore, 
New Mexico ; Bigelow, Wright, Cooke’ s spring, New Mexico; Thurber. 
CHENACTIS CARPHOCLINIA (sp. nov.): annua? lanuloso-pubescens, mox glabrata, subviscosa ; 
caule ramosissimo ; foliis 1-2-pinnatipartitis, segmentis parvis linearibus (1-3 lin. longis); 
capitulis subcorymbosis ; involucro viscoso ; corollis albidis? radii limbo ampliato sed regulari 
discum haud superantibus, pappi paleis 4 ovato-lanceolatis acuminatis ; receptaculo paleis | 
nonnullis setaceis involucrum aequantibus inter flores onusto.—Gila and Colorado desert; Schott. 
Fort Yuma, E. California ; Major Thomas. Plant 4 to 9 inches high, resembling slender forms 
of C. stevioides. Heads corymbose-panicled, half an inch long, on short and slender peduncles, 
12—25-flowered. Involucre either glandular-viscid or hirsute with viscid hairs. The remark- 
able peculiarity of the species consists in a set of filiform or setaceous persistent paleæ on the 
receptacle, 5 to 10 in number, subtending as many disk-flowers ; but in every other respect the 
plant is a true Cheenactis. 
HYMENOPAPPUS LUTEUS, Nutt.; Gray, Pl. Fendl. p. 97. Stony hills, Cobre, New Mexico ; 
Bigelow, Wright; and Mimbres; Thurber. Guadalupe сайоп; Captain Smith. Cordilleras 
ШОГ cce UN A] 
longer than the achenium ; the bristles, or rather aristiform paleae, consimilar, except that a few are smaller, tapering upwards, 
simple, but all more or less coherent at the very base, so that they fall off ina ring. There are faint indications of some dark 
glands on the foliage, which, if confirmed in better specimens, may justify a reference of the genus to the Tagetine, in which 
case it would make as perfect a transition between that subtribo and the Heleniew as another бом of the same region 
(Sartwellia) does between the latter and the Flaveriet. 
