212 NORTH AMERICAN FLORA [VoLuME 34 
about 3 mm. long; achenes 3 mm. long, hirsute; pappus of 2 or 3 stout bristles, 2 mm. long, 
slightly dilated below. 
Type collected in the vicinity of Fuerte, Sinaloa, March 26, 1910, Rose, Standley & Russell 
13537 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Sinaloa. 
56. Pectis Rusbyi Greene; A. Gray, Syn. Fl. 1°: 361. 1884. 
A low annual; stem rather simple, about 1 dm. high, angled, glabrous; leaves flat, linear 
or linear-oblanceolate, mostly obtuse, 2-3.5 cm. long, 1-3 mm. wide, with 2-3 pairs of basal 
bristles; peduncles 3-6 cm. long; involucre 4-5 mm. high and as wide, turbinate; bracts about 8, 
flat, slightly keeled at the base, obtuse, with a conspicuous apical gland; ray-flowers about 8; 
ligules yellow, 6 mm. long, 2 mm. wide; disk-flowers 20-30; corollas 4 mm. long; achenes 4 mm.. 
long, sparingly hirsutulous or glabrate; pappus of the disk-flowers of many minute awn- 
tipped squamellae; that of the ray-flowers of 2 or 3 slender awns, 2.5-3 mm. long. 
TYPE LOCALITY: Beaver Creek, Arizona. 
DISTRIBUTION: Known only from the type locality. 
57. Pectis purpurea Brand. Zoe 5: 225. 1905. 
A branched annual; stem 1-3 dm. high, angular, glabrous, purple; leaves linear or linear- 
lanceolate, 3-4 cm. long, 3-4 mm. wide, with revolute margins, with 1 or 2 rows of glands on 
each side of the midrib and 2 or 3 pairs of bristle-tipped lobes or teeth at the base; heads on 
elongate, axillary and terminal peduncles 5-8 cm. long; involucre turbinate-campanulate, 
4-5 mm. high, purple; bracts oblanceolate, keeled below, with 2 rows of conspicuous glands 
and a deltoid obtuse apex; ray-flowers about 8; ligules linear, 6 mm. long, purple on the back; 
disk-flowers numerous; corollas 3 mm. long; achenes 3 mm. long, pubescent; pappus of a 
minute crown of short fimbriate acute squamellae. 
TyPE Locality: Near Cofradia, Sinaloa. 
DISTRIBUTION: Sinaloa. 
58. Pectis Rosei Fernald, Proc. Am. Acad. 33: 77. 1897. 
A diffusely branched annual; stem purple, about 2 dm. high; leaves filiform, revolute, 
mucronate, 2—4 cm. long, 0.5—1 mm. wide, with 2 pairs of basal bristles; heads many, solitary, 
axillary; peduncles terete, 2-4 cm. long; involucre 3-4 mm. high, 3 mm. broad; bracts 8, acut- 
ish, strongly keeled and bearing conspicuous elongate black glands; ray-flowers about 8; 
ligules 3 mm. long, narrow, yellow, becoming rose-tinged; disk-flowers 10-15; corollas 2—2.5 
mm. long; achenes barely 3 mm. long, hirsute; pappus of 2 or 3 slender awns, 2 mm. long, and 
often a minute squamellose cup. 
Type LocaLity: Alamos, Sonora. 
DISTRIBUTION: Known only from the type locality. 
59. Pectis fasciculiflora DC. Prodr. 5: 100. 1836. 
An erect perennial, slightly fruticulose at the base; stem glabrous, 2-5 dm. high, branching 
above; leaves linear or linear-oblanceolate, obtuse or acute, 2-4 cm. long, 4-6 mm. wide, 
minutely serrulate under a lens, with scattered glands and 1-5 pairs of bristles towards the 
base; heads 8—12-flowered, crowded on short branches in the axils of reduced floral leaves; 
involucre 4-6 mm. high, 2-3 mm. broad; bracts linear, acuminate, keeled below the middle; 
ligules oblong, 3 mm. long; disk-corollas 2.5 mm. long; achenes minutely hispidulous or glabrate, 
2.5 mm. long; pappus of 1—3 slender awns, 4-5 mm. long, with or without a small squamellate 
cup at the base. 
TYPE LOCALITY: Mexico. 
DISTRIBUTION: Guerrero. 
60. Pectis Berlandieri DC. Prodr. 5: 100. 1836. 
A low annual; stem 1-2 dm. high, with many angled glabrous or minutely puberulent 
ascending branches above; leaves linear, 1-3 cm. long, about 1 mm. wide, acuminate, scabrous, 
