Part 3, 1916] CARDUACEAE: TAGETEAE 209 
involucre 5—6 mm. high, and as broad, turbinate; bracts 8-10, keeled below the middle; ray- 
flowers 8-10; ligules yellow, narrow, about 5 mm. long, 1.5—2 mm. broad; disk-flowers 25—40; 
corollas about 5 mm. long; achenes 4 mm. long, strigose; pappus-bristles of the disk-flowers 
15-20, scabrous, 3 mm. long; those of the ray-flowers 2 or 3, somewhat dilated at the base. 
TYPE LocaLity: Guaymas, Sonora. 
DISTRIBUTION: Sonora and Lower California. 
45. Pectis Mearnsii Rydberg, sp. nov. 
A diffuse annual; stem branched, 1—-1.5 dm. high, somewhat angled, reddish; leaves linear, 
2-3 em. long, 2-4 mm. wide, with 2-4 pairs of bristles near the base; glands in a single 
marginal row on each side; heads solitary at the ends of the branches; peduncles 2-4 cm. 
long; involucre campanulate, 5 mm. high and fully as broad; bracts about 8, oblong, obtuse, 
carinate on the back, with inconspicuous glands; ray-flowers about 8; ligules oblong, 8 mm. 
long, 3-4 mm. wide; disk-flowers 15—20; corollas 5—6 mm. long; achenes 5 mm. long, sparingly 
hirsute; pappus of the disk-flowers of about 30 unequal slender bristles, 1-4 mm. long; that 
of the ray-flowers of 2—5 stout bristles. 
. a collected at Fort Verde, Arizona, October 1, 1887, Dr. E. A. Mearns 184 (herb. N. Y. Bot. 
ard.). 
46. Pectis Barberi Greenman, Proc. Am. Acad. 40: 48. 1904. 
A subscapose annual; stem simple or branched at the base; leaves crowded at the base, 
oblanceolate, 1-2 cm. long, 2—5 mm. wide, obtuse at the apex, with 4-6 pairs of bristles at the 
narrow base, glabrous, paler beneath; glands in a single row along each margin; peduncles 5-15 
em. long, minutely bracteate; involucre campanulate, 5—6 mm. high and as broad, glabrous 
and purplish; bracts usually 13, oblanceolate or oblong, obtuse, scarious-margined, keeled 
towards the base; ray-flowers about 13; ligules 5-6 mm. long, about 2 mm. wide; disk-flowers 
30-45; corollas 4 mm. long; achenes 3 mm. long, puberulent; pappus of the disk-flowers of 
5 longer and many shorter bristles, often purplish; that of the ray-flowers of 2 bristles. 
TYPE LOCALITY: Sierra Madre, near Colonia Garcia, Chihuahua. 
DistRIBuTION: Type locality and vicinity. 
47. Pectis Haenkeana (DC.) Schultz-Bip.; Seem. Bot. Voy. Herald 
309. 1857. 
Lorentea Haenkeana DC. Prodr. 5: 102. 1836. 
Lorentea Haenkeana hirsuta DC. Prodr. 5: 102. 1836. 
? Loreniea Haenkeana laeviuscula DC. Prodr. 5: 102. 1836. 
A diffuse annual, or perhaps sometimes more enduring; stem dichotomously branched, 
ascending or depressed, puberulent or pilose, 1-2 dm. high, often purplish; leaves linear or 
nearly so, 1—-2.5 cm. long, 1.5-4 mm. wide, slightly pubescent or glabrate, with 2-5 pairs of 
bristles; glands in 1 or 2 rows on each side of the midrib, inconspicuous; heads solitary, in the 
forks or at the ends of the branches; peduncles 1-3 cm. long; involucre turbinate, 4-5 mm. 
high and nearly as broad; bracts 5, oblong, obtuse, keeled at the base, ciliate at the tip; ray- 
flowers 5; ligules 2.5-4 mm. long, yellow, or tinged with red outside; disk-flowers 20-25; 
corollas 4 mm. long; achenes 3-4 mm. long, hirsute on the angles or glabrate; pappus of 5 or 6 
longer and stouter scabrous bristles, 4-5 mm. long, and many more eislender, unequal, and 
shorter ones, those of the ray-flowers often fewer. 
TYPE LOCALITY: Mexico. 
DisrriputTion: Oaxaca to Querétaro; Nicaragua (?). 
48. Pectis Schottii (Fernald) Millsp. Field Columb. Mus. Publ. Bot. 
3: 143. 1904. 
Pectis elongata Schottii Fernald, Proc. Am. Acad. 33: 78. 1897. 
An erect slender annual; stem paniculately branched, 3-4 dm. long, angled, scabrous or 
smooth; leaves linear-oblong, apiculate, 1-2.5 cm. long, 1-2 mm. wide, with 3-5 pairs of 
bristles near the base, and but 2 rows of glands beneath; peduncles solitary, terminal or in 
