28 NORTH AMERICAN FLORA [Volume 34 



1. Lembertia Congdoni (A. Gray) Greene, Fl. Franc. 441. 1897. 



Eatonella Congdoni A. Gray, Proc. Am. Acad. 19: 20. 1883. 



Alow annual or perhaps biennial; stem branched at the base, 1-2 dm. high, sparingly 

 floccose; leaves alternate, oblong or linear-oblong, loosely floccose, 2-3 cm. long, entire or 

 sinuate-denticulate; heads subsessile or short-peduncled from the upper axils; involucre hemi- 

 spheric, 4 mm. high, 6 mm. broad; bracts 5, oval, floccose; rays-flowers wanting or with small 

 corollas, 1 mm. long, pistillate; disk-corollas yellow, 1.5 mm. long; tube equaling the cam- 

 panulate throat; achenes oblong, flat, but slightly ridged on the faces, 2.5 mm. long; pappus- 

 squamellae few, erose, muticous, scarcely longer than the hairs. 



Type locality: Deer Creek, Tulare County, California. 

 Distribution: South-central California. 



19. PERICOME A. Gray, PL Wright. 2: 81. 1853. 



Tall perennial herbs, minutely puberulent and strong-scented. Leaves opposite, petioled, 

 with more or less hastate or triangular, caudate-acuminate blades. Heads in large cymes, 

 discoid. Involucre turbinate-campanulate or ellipsoid; bracts in a single series, narrow, more or 

 less united at the base, hyaline on the margins, with thickened midribs. Flowers all herma- 

 phrodite and fertile; corolla-tube short, glandular- granulif erous ; throat cylindric, long; teeth 4, 

 ovate, spreading. Anthers subsagittate at the base. Style-branches filiform, slightly flattened, 

 obtuse, minutely hirte'lous externally and at the apex. Achenes linear-oblong, compressed, 

 densely hispid-ciliate on the callous margins. Pappus of a crown of fimbriate-lacerate squa- 

 mellae and sometimes with two marginal awns. 



Type species, Pericome caudata A. Gray. 



Involucre 5-6 mm. high. 1. P. caudata. 



Involucre fully 10 mm. high. 2. P. macrocephala. 



1. Pericome caudata A. Gray, PI. Wright. 2: 82. 1853. 



A tall branched perennial; stems 1-1.5 m. high, terete, striate, minutely puberulent; 

 petioles 1-3 cm. long; blades hastate or deltoid, caudate-acuminate, entire or sinuate, 5-10 cm. 

 long, minutely puberulent and punctate, pedately 3-5-ribbed; heads in terminal cymes; 

 pedicels 1-2 cm. long; involucre turbinate-campanulate, 5-6 mm. high and nearly as broad; 

 bracts about 20, linear, acuminate, puberulent; corolla- tube about 1.5 mm. long; throat about 



3 mm. long; achenes narrowly-oblong, about 3 mm. long, sparingly hirsute or glabrate on the 

 faces, densely hirsute-ciliate on the callous margins; crown of pappus about I mm. long; awns 



4 mm. long or more, or commonly wanting. 



Type locality: Copper Mines [Santa Rita del Cobre], New Mexico. 



Distribution: Western Texas to southern Colorado, Nevada, southern California, and Chihua- 

 hua. 



Illustration: Clements, Rocky Mt. Fl. pi. 41, f. 5. 



2. Pericome macrocephala B. L. Robinson, Proc. Am. Acad. 

 43:42. 1907. 



A tall perennial, growing in bunches; stems subterete, striate, somewhat brownish, grayish- 

 puberulent; petioles slender, 2-3 cm. long; leaf-blades triangular-hastate, 5-6 cm. long, 4-5 

 cm. wide, caudate-attenuate, grayish-puberulent, pedately 3-5-ribbed; heads numerous, 

 cymose; pedicels pubescent, 1-2 cm. long; involucre ellipsoid, 10-12 mm. high, 5-7 mm. 

 broad; bracts puberulent, imited to near the top, grayish-pubescent, acute; corollas Hght-yellow, 

 1 cm. long; tube 3 mm. long, glandular-puberulent; throat cylindric; teeth 4, short, ovate- 

 oblong, obtuse; achenes black, narrowly oblong, sparingly hirsute or glabrate on the faces, 

 densely hirsute on the margins; pappus of squamellae scarcely longer than the hairs; awns 

 wanting. 



Type locality: San Ram6n, Durango. 

 Distribution: Known only from the type locality. 



