698 CONTRIBUTIONS FEOM THE NATIONAL HEEBAEIUM. 



1. Madia glomerata Hook. Fl. Bor. Amer. 2: 24. 1834. 

 Type locality: "Plains of the Saskatchawan." 

 Range: British America to Colorado and northern New Mexico. 

 New Mexico: Chama; Brazos Canyon. Moist ground in the mountains, in the 



Transition Zone. 



52. BLEPHARIPAPPUS Hook. 



Stout, hirsute, sparingly branched annual with alternate, entire, linear or oblong, 

 sessile leaves, and rather large heads of white flowers; rays large and showy; invo- 

 lucre of a single series of narrow bracts with scarious margins, inclosing the achenes 

 of the ray flowers; receptacle flat, bearing a series of chaffy bracts between the ray 

 and disk flowers; achenes somewhat compressed, those of the ray flowers destitute 

 of pappus, the inner ones with a pappus of numerous bristles. 



1. Blepharipappus glandulosus Hook. Fl. Bor. Amer. 1: 316. 1830. 



Layia glandulosa Hook. & Arn. Bot. Beechey Voy. 350. 1833. 



Layia neomexicana A. Gray, PI. Wright. 2: 98. 1853. 



Type locality: "Common on the plains of the Columbia, in sandy soils, under 

 the shade of Purshia and Artemisia." 



Range: British Columbia and Idaho to California and New Mexico. 



New Mexico: Mangas Springs. 



53. GUARDIOLA Humb. & Bonpl. 



Erect annual with sessile, mostly connate, oblong-lanceolate leaves and small 4- 

 flowered turbinate heads, each with a single ray; involucre of 3 concave membrana- 

 ceous bracts; achenes oblong, slightly compressed, glabi'ous; pappus wanting. 



1. Guardiola diehlii Jones, Contr. West. Bot. 12: 48. 1908. 

 Type locality: "Albuquerque and Socorro, New Mexico." 

 Range: Known only from the type collections. 

 We have seen no specimens of this species. 



54. DICRANOCARPTJS A. Gray. 



Low slender annual, the leaves divided into linear segments; heads small, with 

 3 or 4 ray flowers and 3 or 4 disk flowers, the rays small and inconspicuoiLs; involucre 

 of 3 or 4 narrow bracts and sometimes 1 or 2 small foliaceous outer ones; achenes dimor- 

 phous, 1 or 2 elongated, puberulent, smooth, with 2 long divergent awns, the others 

 short, more or less tuberculate, bearing 2 short divaricate horns. 



1. Dicranocarpus dicranocarpus (A. Gray) Woot. & Standi. Contr. U. S. Nat. 

 Herb. 16: 189. 1913. 



Heterospermum dicranocarpwn A. Gray, PI. Wright. 1: 109. 1852. 



Dicranocarpus parviflorus A. Gray, Mem. Amer. Acad. n. ser. 5: 322. 1854. 



Wootonia parviflora Greene, Bull. Torrey Club 25: 122. 1898. 



Type locality: Plains between the Guadalupe Mountains and the Pecos, western 

 Texas. 



Range: Southern New Mexico and western Texas to northeastern Mexico. 



New Mexico: White Sands. Alkaline soil, in the Lower Sonoran Zone. 



55. MELAMPODIUM L. 



Perennial herb, 30 cm. high or less, often woody at the base, with opposite, entii-e, 

 linear to spatulate leaves; heads long-pedunculate, with large white rays; bracts 

 in 2 series, the outer 4 or 5 flat, ovate, partially united, the inner each embracing 

 an achene and deciduous with it; achenes obovate, incurved; pappus none. 



