ROBINSON. — DIAGNOSES OF TROPICAL AMERICAN PHANEROGAMS. 623 



was secured southwest of the City of Oaxaca, alt. 2300-2900 m., 10-20 

 September, 1894, Nelson, no. 1363 (hb. U.S. Nat. Mus.); and in the Val- 

 ley of Oaxaca, alt. 1700-2300 m., 20 September, 1894, Nelson, no. 

 1449 (hb. U. S. Nat. Mus.). This species is nearly related to C. scabi- 

 osoides HBK., C. Uhdeanus Kunth, and C. caudatus HBK. From 

 C. scabiosoides it differs in its pale rays, yellow disk-flowers, and bipin- 

 natifid leaves ; from 0. Uhdeanus (which seems to be represented by 

 Pringle's no. 8238) it differs in having larger heads, lighter rays, and 

 yellow disk-flowers ; and from C. caudatus it is distinguished by 

 having the involucral scales of subequal length and achenes usually 

 4-aristate and much less caudate -attenuate. 



Cosmos Palmeri, n. sp., herbacea 3-5 dm. alta; radice e fibris 

 2-5 tuberiformibus graciliter fusiformibus elongatis 5-8 mm. crassis ; 

 caule tereti folioso puberulo ; foliis oppositis vel alternis bipinnatifidis 

 3-5 cm. longis, lobis linearibus 1-nerviis acutiusculis in margine et in 

 nervo breviter hispid ulis, 4-17 mm. longis 1-2 mm. latis; pedunculis 

 ca. 2 dm. longis nudis 1-capitatis ; capitibus (ligulis inclusis) 6-8 cm. 

 diametro ; involucri squamis exterioribus ca. 8 lanceolati-oblongis 

 ascendentibus vel saepe reflexis 8 mm. longis 2 mm. latis viridibus 

 striatis gradatim ad apicem obtusiusculum angustatis apice paulo 

 incrassatis interioribus ovati-oblongis acutiusculis viridi-stramineis gla- 

 bris striatis margine tenuibus ca. 1.5 cm. longis ca. 5 mm. latis apice 

 ciliolatis ; ligulis ca. 8 lilacinis ellipticis 2.5-3.5 cm. longis 1.2 cm. latis ; 

 corollis disci flavis ; achaeniis (valde immaturis) fusiformibus in costis 

 hispidulis apice aristas 2 rigidiusculas erectas gerentibus ; aristis levis- 

 simis apice solum aculeolis binis patenti-defiexis munitis. — Moist spots 

 on hills and plains at Otinapa, Durango, Mexico, 25 July-5 August, 

 1906, Dr. Edward Palmer, no. 388 (type, in hb. Gray). 



Cosmos Pringlei Robinson & Femald, n. sp., e radicibus 1-2 tu- 

 beriformibus crassiusculis 5-7 cm. longis erectus 6-9 dm. altus ; caule 

 tereti fiexuoso griseo-puberulo vel -pulverulo praecipue in media parte 

 folioso ; foliis petiolatis firmiusculis ab ovato-oblongis indivisis apice 

 dentatis ad formas profunde partitas vel pinnatifides cum segmentis 

 linearibus integris obtusis variantibus ; capitibus magnis (ligulis in- 

 clusis) 6 cm. diametro, pedunculis 1-3 saepe 3 dm. longis ; involucri 

 campanulati squamis ovato-oblongis exterioribus 8-11 mm. longis in- 

 terioribus ca. 13 mm. longis ; flosculis disci flavi ; achaeniis graciliter 

 rostratis 16 mm. longis sursum sparse hispidulis apice aristas binas 

 arcuato-ascendentes retrorsum barbatas gerentibus ; ligulis late ellip- 

 ticis laete purpureis nee atro-violaceis. — Chihuahua, Mexico : pine 

 plains at the base of the Sierra Madre, 20 September, 1887, Pringle, 

 no. 1299 (type, in hb.Gray); at base of Mt. Mohinora, 12 km. from 



