76 PROCEEDINGS OF THE AMERICAN ACADEMY. 
scabrous, the internodes elongated: leaves plane or revolute, smooth or 
scabrous toward the bases, obtuse or acute and sometimes mucronulate, 
shorter than or equalling the internodes, in large specimens 5 or 6 cm, 
long, 3 mm. wide, naked or bearing 1 to 5 pairs of basal sete : peduncles 
terete, 2 to 8 cm. long, ebracteate or with 1 to 3 remote bracts: involucre 
4 to 6 mm. high, about 10-flowered, the bracts blunt or quite obtuse, 
plane or slightly keeled below the middle, generally glandless or with 
faint glands: rays 5 or 6 mm. long: pappus 1 to 4 slender rigid awns 2} 
to 4 mm. long, and sometimes a few blunt squamelle at the base: akenes 
4 or 5 mm. long.— Harv. & Gray in Gray, Pl. Fendl. 62; Gray, Pi. 
Wright. ii. 69, in Torr. Mex. Bound. 73 & Bot. Cal. i. 400. P. Jalis- 
cana, Hemsley, Biol. Centr.Am. Bot. ii. 225, in part, not Hook. & Arn. 
P. punctata, Wats. Proc. Am. Acad. xxiv. 58, not Jacq. — A lemon- 
scented species common in the mountains from Southwestern Texas 
through New Mexico, Arizona, and adjacent Mexico. Texas, Pena 
Colorado (Havard, no. 11); New Mexico, Coppermine Creek (C- 
Wright, no. 1125), Coke Cafion (Thurber, no. 1167); Arizona, Sul- 
phur Springs (Rothrock, no. 539), near Fort Huachuca (Lemmon, no. 
2781), Santa Rita Mts. (Pringle); Sonora, Guaymas (Palmer, 1887; 
no. 656). Founded upon Coulter’s no. 329 from “ California.” 
Var. subnuda. Suberect, branching mostly above the base: pedun- 
cles 1} to 3 em. long, ebracteate or with one or two apical bracts: invo 
lucre pale, purple-tinged, 5 mm. high, the bracts acutish or rarely obtuse: 
rays 3 or 4mm. long: the 1 or 2 awns 2 mm. long, usually with dilated 
‘bases: akenes 3} or 4 mm. long. — Southeastern Arizona and adjacent 
Mexico. Arizona, Bisbee (F. E. Lloyd); Sonora, Cocuto (Hartman, 
no. 70) ; Curtmuanva, Janos (Schott). 
+ + Involucre about 8-bracteate. 
++ Bracts broad-linear, flat at least above the middle, very obtuse. 
== Pappus of both ray- and disk-akenes aristiform. 
og P. Pringlei. Low, 5 or 6 ecm. high, divergently much-branched, 
with strongly angulate glabrous branches and peduncles : leaves revolute, 
slender, mucronate, equalling or longer than the internodes, 1 to 2 cm. 
long, barely 1 mm. wide, with 2 pairs of basal sete: peduncles 1} 
24 cm. long, usually 1—2-bracteate: involucre 5 or 6 mm. high, about 25- 
flowered ; the bracts plane above, strongly keeled below, bearing a large 
apical gland, and 1 or 2 smaller ones below: rays 5 mm. long: papp¥s 
2 or 3 very slender awns 3 to 5 mm. long, slightly dilated below: akenes 
equalling or slightly exceeding the awns. — Duraneo, Jimulco (Pringle, 
no. 125). : 
eee. 2 We 
