1917] SHERFF—BIDENS 23 
venas) ; petiolis o.3-4 cm. longis, sparsim hispido-ciliatis, ad basim 
connatis. Capitula terminalia, subradiata aut discoidea, ad 
anthesin 3-5 mm. alta et (radiis comprehensis) 4-8 mm. lata, in 
fructu 1-1.5 cm. alta et solum 2-4 mm. lata, tenuissime peduncu- 
lata, pedunculis 2-8 cm. longis. Involucrum basi subglabrum, 
squamis duplici serie dispositis; exterioribus (4-6) linearibus, 
ciliatis, 1-2.5 mm. longis; interioribus dimidio longioribus, lance- 
olatis, glabris aut ad apicem pubescentibus, margine diaphanis. 
Ligulae (si praesentes) circiter 3, minimae, circ. 2.5 mm. longae 
et 1.2 mm. latae, integrae aut ad apicem bidentes, 4—5-striatae, 
subalbidae. Dalene anguste lanceolatae, striatae, margine dia- 
phanae, demum 5-7 mm. longae. Achaenia pauca (5~9 aut etiam 
13), subtetragona, linearia, biaristata aristis retrorsum hamosis; 
quaedam exteriora badia aut subnigra, hispida, 6-8 mm. longa; 
interiora nigra aut ad apicem helvola, infra sgn supra hispida, 
©.9-1.4 cm. longa. 
J. C. Blumer 1712, in shade, sandy alluvium soil at altitude of ni 
near Cedar Gulch, Paradise, Chiricahua Mountains, Arizona, Si 
1907 (type in Herb. Gray); idem 2144, at altitude of 1760 m., base of heck. 
slope, Wilgus Ranch, Chiricahua Mountains, Arizona, September 4, 1907; 
Dr. J. M. Bigelow (Lieut. A. W. Whipple’s Explor. Exped.), Hurrah Creek, 
Fort Smith to the Rio Grande, apo 25, 1853-54; E. L. Greene 263, 
banks of the Upper Gila River, New Mexico, August 29, 1880; J.G. Lemmon 
Apache 
333, near Fort Huachuca, Arizona, Sager katy - Pass, Chiricahua . 
Mountains, Arizona; idem 3029, near Fort Huachuca, en in 1883; 
Mr. and Mrs. J. G. Lemmon, Apache Pass, Fort Bowie, Arizona, Sep 
1881; C. G. Pringle 62, near Arivaca, Arizona, August at, 1884; David Grifiths : 
_ 1985, Hudson Ranch, near Pierce, Arizona, October 1900; idem 5904, fenced — 
ores, Santa Rita Forest. Reserve, Axizons, September ee 4, 1903; 
Ole 18, 1903; J. we Picinker 72, I of 1780 m., Stone Cabin ee 
Canyon, Santa Rita Mountains, Arizona, September 14, aie rican 
