Part 3, 1916] CARDUACEAE: TAGETEAE 205 
minute, close, in a single marginal row on each side; heads solitary in the axils; peduncles 
erect, 1-7 cm. long, compressed, angled; involucre campanulate, 8-12 mm. high, 5-10 mm. 
broad; bracts 5-8, flat, striate, oblong or ovate-oblong, obtuse or acute, scarcely keeled below; 
ray-flowers 5-8; ligules oblong, 6-7 mm. long; disk-flowers 15-80; corollas 5-6 mm. long; 
tube 1 mm. long; achenes 6-7 mm. long, compressed, striate, glossy, glabrous or sparingly 
hirsutulous; squamellae 10-20, linear-subulate, attenuate into an awn, unequal, the longer 
4 mm. long. 
Type Locatity: Acapulco, Guerrero. ; 
DISTRIBUTION: Sinaloa to Guerrero; Salvador (?); also in Ecuador (?). 
29. Pectis grandiflora Klatt, Leopoldina 1895: Bot. Beibl. 6. 1895. 
A decumbent perennial; stem branched, 3-10 dm. long, glabrous or puberulent along 
decurrent lines; branches erect; leaves linear, acute, mucronate, 2-4 cm. long, 2-3 mm. 
wide, thick, with 3-6 pairs of bristles near the base; glands small, close together in a single 
marginal row on each side; heads terminal, solitary; peduncles 2-3 cm. long, curved, angled; 
involucre campanulate, 9-10 mm. high, 5-8 mm. broad; bracts 5, broadly oblong, many- 
striate, ciliate, keeled to the apex; ray-flowers 5; ligules oblong, about 5 mm. long, 1.5 mm. 
wide, at first reddish; disk-flowers 30-35; corollas 5-6 mm. long; achenes 6 mm. long, short- 
setose; squamellae 12-15, subulate, scabrous, awn-like, the longer 4-5 mm. long. 
TYPE cocaLity: HAto-Viejo, Costa Rica. 
DisTRiBuTIoNn: Costa Rica and Panama. 
30. Pectis diffusa H. & A. Bot. Beech. Voy. 296. 1837. 
A perennial, with a suffruticose caudex; branches 1-2 dm. long, decumbent or nearly 
erect, densely leafy, angled, glabrous or puberulent; leaves ascending, arcuate, linear-subulate, 
attenuate, rather firm, with thick midrib and margins, glabrous or scabrous on both sides, 
2-4 em. long, 2-3 mm. wide, with 5-10 pairs of bristles below the middle; glands inconspicuous 
or even obsolete, in a single row along each margin; heads solitary from the upper axils; pe- 
duncles slender, 4-6 cm. long; involucre turbinate, 5-6 mm. high, 4 mm. broad; bracts 5, 
oblong, acute; ray-flowers 5; ligules oblong, yellow, 5—7 mm. long; disk-flowers 7-10; corollas 
4 mm. long; achenes 4 mm. long, short-hispid or glabrate; pappus-bristles 5-20, very unequal, 
rarely a little dilated at the base, the longer 3 mm. long. 
TYPE LocaLity: Jalisco. 
DISTRIBUTION: Jalisco and Colima. 
31. Pectis longipes A. Gray, Pl. Wright. 2: 69. 1853. 
A perennial, with a cespitose slender caudex; stem densely leafy below, 1-2 dm. high, 
glabrous, ascending; leaves linear, mucronate, thickish, 2-4 cm. long, 1.5-3 mm. wide, with 
2-3 pairs of bristles near the base; glands conspicuous, in a single row along each margin; heads 
solitary at the ends of the branches or in the upper axils; peduncles 6-14 cm. long, slender; 
involucre campanulate-turbinate, 6-8 mm. high, 8-10 mm. broad; bracts 12-15, linear, plane 
above, keeled below, acute, bearing a large apical gland; ray-flowers 12-15; ligules yellow, 
narrowly oblong, 6-8 mm. long, 1.5—2 mm. wide; disk-flowers 40-75; corollas 4-5 mm. long; 
achenes 4-5 mm. long, more or less pubescent; pappus-bristles of the disk-flowers 20-40, 
very unequal, capillary, scabrous, the longest 4-6 mm. long; those of the ray-flowers 2, slender, 
3-5 mm. long, and rarely a few additional reduced ones. 
Tyre LocaLity: Mountain valley between San Pedro and Santa Cruz, Sonora. 
Distrieution: Western Texas to Arizona, Sonora, Durango, and Chihuahua. 
32. Pectis latisquama Schultz-Bip.; (A. Gray, Proc. Am. Acad. 5: 181, 
hyponym. 1862) Fernald, Proc. Am. Acad. 39: 118. 1903. 
A low prostrate perennial, with a suffruticose cespitose caudex; stem leafy, hirtellous- 
puberulent, 1-2 dm. long; leaves linear or lance-linear, 1-2 cm. long, 2-3 mm. wide, acute, 
revolute-margined, glabrous or nearly so, with 3—5 pairs of bristles near the base; heads solitary 
