ee a ee a a ee 
FERNALD. — GENUS PECTIS. 75 
with 4 or 6 rows of glands (only 2 rows on the small leaves) ; margins 
with 5 to 9 pairs of sete: peduncles very few and scattered, capillary, 1 
or 2 cm. long, 1-3-bracteate, involucre 5 mm. long, about 10-flowered: 
pappus of 2 or 3 setiform awns barely as long as the akene. — P. Ber- 
landieri, DC.? var. Palmeri, Gray, Proc. Am. Acad. xxi. 3938. — Cur 
HUAHUA, south of Batopilas (Palmer, 1885, no. 61). 
+ + Awns slightly or not at all dilated at the base. 
Pkt uniaristata, DC. Stems compressed-angulate, smooth or rough- 
ish below the nodes, very diffusely branched from below the middle, 1 to 
3 dm. high: leaves mucronate, scabrous above, with 2 or 4 rows of 
glands beneath, bearing 8 to 5 pairs of sete ; the cauline leaves about an 
inch long, the others becoming reduced to small bracts: peduncles slender, 
8 to 13 mm. long, 1-3-bracteate: involucre 4 or 5 mm. high, about 10- 
flowered: pappus a shallow cupuliform crown and 1 or 2 (rarely 0) very 
slender setiform awns, 2 mm. long: akenes equalling the pappus, ap- 
pressed short-setose. — Prodr. v. 99; Gray, Proc. Am. Acad. xix. 46. — 
Mexico fide DC. 1. c.; Jasco, plains of Guadalajara (Pringle, no. 1813, 
in part); Corma, Manzanillo (Xantus). Both plants which have been 
examined have the stems distinctly angulate, not “ terete ” as in De Can- 
dolle’s characterization ; but otherwise they conform closely to his 
description, 
+ + + Awns none, pappus merely a squamellose cup. 
vs P. dichotoma, Klatt. Erect or suberect, 8 to 15 mm. high, glabrous, 
somewhat dichotomous-branching : leaves spatulate-linear, submucronate, 
the largest about 2 em. long, 2 mm. wide, with 2 or 4 rows of glands 
beneath, and bearing 2 to 4 pairs of sete: peduncles capillary, 1} cm. 
long, naked or with 1 or 2 bracts: involucre 3 or 4 mm. high, 8-10- 
flowered: cupuliform pappus slightly longer than in P. untaristata: 
akenes short-setose or glabrate. — Leopoldina, xx. 92 (reprint 5). P. 
Jilipes, Sch. Bip. in herb., not Harv. & Gray. P. Jaliscana, Hemsley, 
Biol. Centr.-Am. Bot. 225, in part, not Hook. & Arn. P. uniaristata, 
DC., var. holostemma, Gray, Proc. Am. Acad. xix. 46. — Mexico, at 
Consoquitlo (Liebmann, no. 394). 
** * & Branching mostly from the base, often very diffuse : leaves linear with 
large scattered marginal glands: heads scattered or more or less clustered, 
on elongated capillary peduncles : involucral bracts 5 to 8, obtuse or acutish. 
+ Involucre 5-bracteate: awns obviously dilated at the base. 
‘ P. filipes, Harv. & Gray. Very slender (or the stem rarely becom- 
ing stout), 1 to 5 dm. high; the diffuse branches smooth and shining or 
