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 0. a8 
osoides HBK., C. Uhdeanus Kunth, and C. caudatus HBK. Fro 
C. scabivecides it differs in its pale rays, yellow disk-flowers, and bipin- 
natifid leaves ; from C. 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 a st heaun ee 
i , herbacea 3-5 dm. alta; radice e fibris 
2-5 tuberiformibus Gracilites fusiformibus elongatis 5-8 mm. crassis ; 
eaule tereti folioso puberulo ; foliis oppositis vel alternis bipinnatifidis 
3-5 em. longis, lobis linearibus 1-nerviis acutiusculis in margine et in 
nervo breviter hispidulis, 4-17 mm. longis 1-2 mm. latis; pedunculis 
ca. 2 dm. longis nudis 1 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 Fan aera nae angustatis apice paulo 
incrassatis interioribus ovati-o viridi-stramineis gla- 
bris striatis margine abhi ca. 1.5 cm. longis ca. 5 mm. latis apice 
ciliolatis ; ligulis ca. 8 lilacinis ellipticis 2.5-3.5 em. longis 1.2 em. 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-deflexis 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 & Fernald, n. sp., e radicibus 1-2 tu- 
beriformibus crassiusculis 5-7 cm. longis erectus 6-9 dm. altus; caule 
tereti flexuoso 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 wraeiihee 
Tostratis 16 mm. longis sursum sparse hispidulis apice aristas binas 
arcuato-ascendentes retrorsum barbatas gerentibus ; ligulis late ellip- 
ticis laete purpureis nec 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 
