FERNALD. — GENUS PECTIS. 79 
very unequal setiform bristles, the longer a little or not at all dilated 
below, and often with an exterior series of minute sete at the base: 
akenes short-setose or glabrate. — Bot. Beech. 296; Gray, Pl. Fendl. 
62, excl. syn. & Proc. Am. Acad. xix. 47, in part; Hemsley, Biol. 
Centr.-Am. Bot. ii, 225, in part; Rose, Contrib, U. S. Nat. Herb. i. 338. 
2 Taliscana, Benth. Pl. Hartw. 121, not Hook. & Arn. fide Hemsl. 1. c. 
—Southwestern Mexico. Jarisco (Beechy in Hook. & Arn. 1. ¢.), 
Rio Blanco (Palmer, 1886, no. 4), dry rocky hills near Guadalajara 
(Pringle, no. 1814) ; Cotma, common on river banks at Colima (Palmer, 
1891, no, 1155). Gregg’s no. 967 (no locality given) is doubtless the 
same thing. The pappus of this as well as the last species is very 
variable in the number of bristles, which are sometimes reduced to 3 or 4, 
thus forming a transition to § Pectidopsis. The Nicaragua and Panama 
specimens referred here by Hemsley are more likely P. elongata. 
* * More diffusely branched from near the base: leaves less rigid and more 
spreading : heads small or middle-sized. 
* Annuals, the pappus mostly barbellate-setose (in P. papposa sometimes reduced 
& mere crown). 
rah ‘ P. papposa, Harv. & Gray. Stems smooth, much-branched, the 
divergent branches 3 dm. or less in length : leaves fleshy, narrow-linear, 
to 6om. long, 1 or 2 mm. wide, rarely with a few sharp lobes, bearing 
2 rows of prominent marginal glands and 2 to 5 pairs of basal sete: 
= Subfastigiate, or subeorymbose on slender 1-3-bracteate peduncles 
? or 8 cm. long, the bracts often glandular: involucre 4} to 7 mm. high, 
about 20-flowered ; the 7 to 9 linear strongly involute obtusish bracts 
more or less punctate : rays yellow, 4 to 8 mm. long: disk-pappus 12 to 
bracing generally barbellate-setose bristles, 4 mm. or less in length, 
‘ometimes reduced to a mere auriculate crown; ray-pappus a squamel- 
8 uriculate crown, rarely with 1 or 2 slender awns, or even obso- 
te Ht akenes : or 4 mm. long, hispidulous or strigose with minute uncinate 
: ean bristles. — Harv. & Gray in Gray, Pl. Fendl. 62; Gray, Pl. 
; het ii, 69, in Torr. Bot. Mex. Bound. 73 & Syn. Fl. i. pt. 2, 361; 
ted, Biol. Centr.-Am. Bot. ii. 226. P. tenella, Rothr. in Wheeler, 
. “si eri, not DC. P. Palmeri, Wats. Proc. Am. Acad. xxiv. 58, 
Biases almer’s no. 655. — Sandy or gravelly soil, Southwestern Scales 
(C thes Sonora and Lower California. New Mexico, Dofia Ans 
(Cure > Camp Bowie (Rothrock, no. 446), Deming 
. & a e ogg) 5 Arizona (S. Hayes, no. 342), Fort Whipple (Coues_ 
| to. 133) " no. 522"), Yuma (Pringle, no. 322), Maricopa (Pringle, 
: )» Tueson (Toumey, no. 675); Catirorn1a (Coulter, no. 331), 
