﻿of the Southeastern United States 481 



The Stone Mountain district or, probably more correctly, the 

 granite region of Georgia now has its already large endemic flora 

 increased by an additional species of Hcliantlius. The species in 

 question was collected by the writer in thickets along meadows 

 between Stone Mountain and Little Stone Mountain, Georgia, and 

 also near Loganville in the same state, during September 1894. 

 Hcliantlius polyphyllus is related to Hcliantlius angustif alius. Diag- 

 nostic characters exist in the stem which is densely hirsute near the 

 base and glabrous above, in the numerous leaves with their very 

 narrow perfectly revolute blades and in the heads, all parts of 

 which are smaller and much more delicate than in the case of He- 



* 



Hanthus angustif alius. 



Annual, glabrous. 



Bidens Nashii. 



o- 



branched : leaves opposite ; blades thickish, oblong to oblance- 

 olate-oblong, 4-10 cm. long, acute, remotely and shallowly ser- 

 rate, somewhat dilated at the base, sessile, upper slightly connate- 

 perfoliate, somewhat fleshy : heads showy : involucral bracts 

 various, outer foliaceous, linear to spatulate, unequal in length, 

 inner more or less colored, elliptic or oval, shorter than the outer : 

 rays deep yellow, oblong or broadly oblong-obovate, 2-2.5 cm - 

 long: disks 1.5-2 cm. broad: achenes narrowly cuneate, 3.5-4 

 mm. long, with a few retrorse hairs in margins and two subulate 

 erect awns. 



In low grounds, Florida to Louisiana. Summer. 



Although the above described species was long ago* recog- 

 nized as more or less distinct from Bidens chrysanthemoides it has 

 never been described under a distinctive name, as far as I can learn. 

 There can be no doubt that it is specifically distinct from other 

 members of the genus Bidcns. Besides the specimen from Louis- 

 iana collected by Dr. Hale and cited by Torrey & Gray, we have 

 good specimens from Florida collected by Dr. Chapman and also 

 by Mr. Nash, no. 2336. From Bidens chrysanthemoides it differs in 

 the fleshy and very smooth foliage, the short and broad remotely 

 and hollowly toothed leaf-blades. The heads are larger and the 

 rays usually longer and broader than those of its relative. 



*T. &G. Fl. N. A. 2: 353 



