422 WiEGAXD : Some Species of Bidens 



apex, slit^^litly contracted toward the broad sessile, but scarcely 

 connate base which in the upper leaves is very broad ; veins incon- 

 spicuous, margins serrate with very fine teeth or nearly entire : 

 licads Jew or often solitary (disk 1 5-20 mm. broad), erect or 

 slightly nodding on long erect peduncles (2-7 cm.); outer involu- 

 cral bracts 8, nearly equal, not exceeding the disk, fleshy, linear to 

 linear-spatulate obtuse, glabrous, appressed or spreading ; inner 

 bracts oval acutish ; chaff yellow : ray flowers present, ligulcs very 

 large (15-35 mm- long x 10-12 mm. wide), elliptic, obtuse, deep- 

 yellow ; ovaries oblong, glabrous except the retrorse margins, 

 truncate and without awns : corolla of the disk flowers large (4 

 mm.), deep yellow, equaling the awns, oblong-campanulate above, 

 abruptly contracted into a slender basal portion, 5-toothed: stamens 

 long-exsertcd : achenes in fruit small (5-6 mm.) narrow, cuneate, 

 slightly contracted at the truncate or concave summit, flat, i -nerved 

 on outer face, margins retrorse, almost serrate: awns 2- -" 

 length of achene), erect, retrorsely barl3ed. 



Florida to Southern California. 



J 



Specimens examined from: — Florida: C/ia/>;;nr//, Nash, Leon 

 Co., no. 2336. Louisiana : Hale, no. 403 (type of T. & G. var.). 

 Carpenter. Texas: Lindhcimer, no. 435; Rio Grande, Sc/ioff. 

 California : San Bernardino, JVrio-ht ; Los Angeles, Brnvcr, no. 91 ; 

 San Francisco, Bolandcr, no. 2405. 



H 



The three specimens of this species cited by Dr. Small in the 

 original description, from Florida and Louisiana, differ from the 

 Californian and Texan plants onl}' in the less acute leaves, while 

 the essential characters remain the same. 



As appearing in the herbarium this species is quite different 

 from B. laci'is in general appearance, due mostly to its fleshy char- 

 acter, small serratures and broad leaf base. The achenes also seem 

 to be slightly narrowed at the top and truncate after the manner of 

 B. coiuiaia. The differences seem constant enough to warrant its 

 recognition as a species. 



CoRNF.I.I, UmVERSITV. 



