Part 3, 1916] CARDUACEAE: TAGETEAE 213 
with 2-4 pairs of bristles below; glands marginal; heads in leafy cymes; peduncles 1 cm. long 
or less; involucre turbinate, 5 mm. high, 3 mm. broad; bracts 5, linear, acuminate, keeled 
towards the base; ray-flowers 5; ligules 2 mm. long; disk-owers 5-7; corollas 2 mm. long; 
achenes 2.5-3.5 mm. long, minutely eee or glabrate; pappus of subequal, slender awns, 
4-5 mm. long, those of the disk-flowers 5-7, of the ray-flowers only 2 or 3. 
TYPE LocALiIty: Tancoyuca, Vera Cruz. 
DISTRIBUTION: Tamaulipas and Vera Cruz. 
61. Pectis Oerstediana Rydberg, sp. nov. 
Pectis taliscana Benth. in Oerst. Vidensk. Meddel. 1852:69. 1852. Not P.taliscanaH.& A. 1837. 
A slender perennial; stem much branched, 3-6 dm. high, terete, purplish, glabrous; 
leaves linear, 3-5 cm. long, 2-3 mm. wide, acute, with scattered glands and 2-5 pairs of bristles 
at the base; heads axillary and terminal, solitary; peduncles slender, 1.5 cm. long or less; 
involucre turbinate, 5 mm. high, 3-4 mm. broad; bracts about 5, acuminate, linear, purplish, 
keeled; ray-flowers about 5; ligules oblong, often purplish, 1.5-2 mm. long; disk-flowers 3-6; 
corollas fully 2 mm. long; achenes 2.5 mm. long, hispidulous; pappus of the disk-flowers of 5 
or 6 (rarely 7 or 8), of the ray-flowers of 3 or 4 (rarely 5), hispidulous bristles, 2-2.5 mm. long. 
Type collected at Realejo, Nicaragua, 1903, C. F. Baker 2137 (U.S. Nat. Herb.). 
DIsTRIBUTION: Nicaragua and Costa Rica. 
62. Pectis capillaris DC. Prodr. 5: 99. 1836. 
Pectis taliscana H. & A. Bot. Beech. Voy. 296. 1837. 
Pectis jaliscana Hemsl. Biol. Centr. Am. Bot. 2: 225. 1881. 
Pectis Berlandieri ? Palmeri A. Gray, Proc. Am. Acad. 21: 393. 1885. 
Pectis capillaris paucicepitata Fernald, Proc. Am. Acad. 33: 74. 1897. 
An erect minutely puberulent or glabrate annual; stem 1-3 dm. high, diffusely branched 
above; leaves linear, mucronate, 2-5 cm. long, 2-3 mm. wide, scabrous-hirsutulous above, 
with prominent ribs beneath and 2-5 pairs of bristles below the middle; glands scattered or in 
the smaller leaves in a single row half way between the midrib and each margin; heads in the 
upper forks and terminal; peduncles 2-3 cm. long; involucre 4-5 mm. high, 3-4 mm. 
broad, turbinate; bracts about 5, acute or acuminate, purplish, keeled; ray-flowers 5; ligules 
2-3 mm. long, yellow, tinged with purple outside; disk-lowers 5-10; corollas 3 mm. long; 
achenes 3 mm. long, short-hirsute or glabrate; pappus of 3-6 bristles about 4 mm. long, some- 
what squamellate at the base, or partly of some minute squamellae, or in the ray-flowers the 
bristles only 1 or 2. 
Type LocaLity: Near Las Bacas, Oaxaca. 
DistrisutTion: Chihuahua to Jalisco and Oaxaca; Panama. 
63. Pectis uniaristata DC. Prodr. 5: 99. 1836. 
A slender annual; stem angled, glabrous or somewhat scabrous under the nodes, diffusely 
branched but simple at the base, 1-3 dm. high; leaves linear, mucronate, scabrous above, 
1.5-3 em. long, with 3-5 pairs of bristles below; heads in leafy cymes; peduncles slender, 1-3 
em. long; involucre 4-5 mm. high and nearly as broad, turbinate, purplish; bracts linear, 
acute or short-acuminate; ray-flowers 5; ligules 2.5 mm. long; disk-flowers about 10; corollas 
2 mm. long; achenes 2-2.5 mm. long, strigose; pappus of a shallow crown and 1 or 2 slender 
awns, 2 mm. long. 
TYPE LOCALITY: Mexico. 
DistTriBuTion: Colima, Jalisco, and Morelos; Sonora (?). 
64. Pectis dichotoma Klatt, Leopoldina 20: 92. 1884. 
Pectis jaliscana Hemsl. Biol. Centr. Am. Bot. 4: 225, in part. 1881. 
Pectis uniaristata holostemma A. Gray, Proc. Am. Acad. 19: 46. 1883. 
Pectis filipes Schultz-Bip.; Fernald, Proc. Am. Acad. 33: 75, as synonym. 1897. Not P. filipes 
Harv. & Gray. 1849, : 
An erect annual; stem 0.5-1.5 dm. high, dichotomously branched; leaves linear or oblance- 
olate-linear, submucronate, 1-2 em. long, 1-2 mm. wide, with 2-4 pairs of bristles towards the 
