CATALOGUE. 169 
simple or branching toward the summit; leaves 1—-2-ternately parted, the 
divisions spatulate or oblanceolate, obtuse, simple or lobed; scales of the 
involucre equal, acuminate, in 2-3 series; ray-flowers about 15 (disk-flowers 
many) ; blade toothed or lobed; tube of the disk-flowers externally glandu- 
lar-hairy ; achenia narrowly turbinate or clavate, black, slightly quad- 
rangular, smooth, ribbed or striate, and longer than the corolla; pappus 
none —Arizona (812, 609). 
PALAFOXIA LINEARIS, Lag. (vide Botany of Fortieth Parallel, p. 424).— 
Arizona. 
PaaroxiA Hooxeriana, T. & G. ?, probably var. subradiata, T. & G.— 
6-12’ high, simple or branched; leaves linear or linear-lanceolate, hirsute, 
1-14’ long; pedicels and flowers viscidly glandular-hairy ; scales of invo- 
lucre lanceolate, acute, sub 2-seried; rays variable, large or small, regularly 
or irregularly 3-cleft; pappus (ray) reduced to small obtuse scales, half a 
line long; achenia sub 4-angled, hairy, broadly clavate ; disk-flowers deeply 
5-parted; tube long and slender, or short and thick; pappus of 5-8 lanceo- 
late or oblong scales, which are nearly as long as the hairy, clavate achenia.— 
A plant which appears to be variable in almost everything about the flower 
except the disk-achenia. Deserts of New Mexico, Loew. 
PoropHyLtuM* macrocepHaLum, DC.—Annual, erect, glabrous; lower 
leaves linear, upper broadly oval (all petioled and glaucous) and sinuate- 
dentate; marginal glands nearly a line long and half as wide; flowers 
solitary, terminating the pedicels, which are hollow and dilated above; scales © 
of the involucre linear, 10” long, with one or two lines of glands 14” long 
and 4” wide; achenia clavate, hairy; pappus fulvous, rough, with delicate 
hairs, nearly or quite as long as the slender flower-tube ; limb of the flower 
dark brown.—A striking species, found usually on or near limestone rocks. 
Sanoita Valley, Arizona, at 4,500 feet altitude (682). 
PoROPHYLLUM, Vaillant.—Head several- to many-flowered, with all the flowers perfect. Involucre 
cylindrical or cylindraceous, of 5 to 10 oblong or linear equal scales in asingle series. Receptacle small, 
naked. Corollas with a slender or filiform tube and a narrow 5-cleft limb. Style-branches slender, 
tipped with a subulate-filiform hispid appendage. Akenes long and slender, nearly terete, striate or 
angled. Pappus of copious, rather rigid, scabrous, capillary bristles, about the length of the corolla.— 
Herbs glabrous and often glaucous; with slender branches terminated by pedunculate heads of yellow, 
whitish, or purplish flowers, and alternate, or —: aie es Seat = pac some of ahd —— 
marked by scattered immersed oil-glands, in 
Fl. Cal. 1, p. 398, 
o ? 
