FERNALD. — GENUS PECTIS. 77 
== = Ray-pappus aristiform, disk-pappus squamellose. 
7 Pp. Rusbyi, Greene. “ Mint-scented,” low, hardly 1 dm. high, simple 
or divergently but sparingly branched, the angulate stems and peduncles 
glabrous: leaves flat or a little revolute, spatulate-linear, with blunt or 
rounded tips (or a few mucronulate), 2 to 3} cm. long, 1 to 8 mm. wide, 
with 2 or 3 pairs of sete : peduncles 3 to 6 cm. long, 2-5-bracteate: in- 
volucre 4 to 6 mm. high, 30—40-flowered ; the flattish bracts slightly 
keeled below, each bearing a large apical gland: rays 6 mm. long: ray- 
pappus 2 or 3 very slender awns 2} or 3 mm. long, scarcely dilated 
below ; disk-pappus a crown of many setaceous-tipped squamellz, free 
or united at the base: akenes 4 mm. long, sparingly setose or glabrate. 
—Greene in Gray, Syn. Fl. i. pt. 2, 361. — Arizona, Beaver Creek 
(Rusby, no. 317). 
+ ++ Bracts narrow-linear, involute, acutish. (Forms of P. papposa may be looked 
for here.) 
= Pappus aristiform. 
P. Rosei. Very diffusely branching from the base ; the purplish 
terete stems smooth: leaves strongly revolute, becoming subterete, mu- 
cronate, equalling or exceeding the internodes, 2 to 4 cm. long, } to 1 mm. 
Wide, with 2 pairs of basal sete : peduncles many, terete, 2 to 4 cm. 
long, 4~6-bracteate: involucre 3 or 4 mm. high, about 20-flowered, the 
acutish bracts strongly keeled and bearing conspicuous elongated black 
glands : rays narrow, 3 mm. long, becoming rosy-tinged: pappus 2 or 3 
slender awns 2 mm. long; and often a minute squamellose cup: akenes 
barely 3 mm. long, spreading-hirsute. — P. punctata, Rose, Contrib. 
U. S. Nat. Herb. i. 105, not Jacq. — Sonora, common on stony ridges, 
Alamos (Palmer, September, 1890, no. 730). 
8 3. PrEcrorurix, Gray. Pappus of many (10 or more) capillary 
bristles, at least in the disk-flowers (or in P. papposa rarely reduced to a 
mere crown), a few of them sometimes enlarged but hardly paleaceous. — 
Pl. Fendl. 62, Pl. Wright. i. 83 & Proc. Am. Acad. xix. 47. Crypto- 
petalon, Cass. Bull. Soc. Philom. janvier, 1817, & Dict. Sci. Nat. xii. 
123. Lorentea, Less. Linnea, v. 135, in part; DC. Prodr. v. 101, in 
part; Gray, Pl. Wright. i. 83, in part [as section ]. 
* Erect or suberect plants with ascending or spreading branches and ascending 
rigid leaves, 
+~ Annual, branching mostly above the middle. 
P. elongata, HBK. Stems rather stiff, purplish, simple below, with 
“scending or spreading branches; stems subterete, smooth, the branches 
slightly tetragonous : leaves linear, submucronate, smooth or scabridu- 
