

184 Gleason : Vernon i a in the Bahamas 



The fourth species, of the section Lepidaploa, subsection Paid- 

 culatae, with corymbose peduncled heads, is entirely different from 

 the others and finds its nearest relatives in the United States. 



The five species may be separated as follows : 



V. cinerea? 



Herbaceous ; heads corymbose, peduncled. 



Leaves ovate, pubescent. 



Leaves linear or oblong-linear, glabrous or nearly so. V. insularis. 



Frutescent ; heads sessile or nearly so, single or in small cymes. 



Inflorescence of many heads ; leaves of an elliptical type, broadest at or near the 



middle. V. arctata. 

 Inflorescence of few heads ; leaves broadest above the middle. 



Leaves oblanceolate, spatulate, or narrowly obovate. V. bakamensis. 



Leaves very broadly obcordate. V. obcordata. 



Vernonia cinerea (L.) Less. Linnaea 4: 291. 1829. 

 Cony z a cinerea L. Sp. PI. 862. 1753. 



This well-known introduced species differs from the other Ba- 

 hamian forms in the ovate or ovate-oblong, petioled, undulate 

 leaves. It belongs to the section Tephrodes, characterized by 

 achenes without evident ribs. New Providence, Earle 60. 



Vernonia insularis sp. nov. 



'pidaph 



stem herbaceous or suffruticose, glabrous or minutely puberulent 

 in the inflorescence, erect, 6-10 dm. high, simple or sparingly 

 branched; leaves numerous, alternate, narrowly oblong-linear, 

 entire, obtuse or sub-acute, mucronate, acute or narrowed at the 

 sessile base, one-nerved or with faint lateral veinlets, green and 

 essentially glabrous on both sides, 6-10 cm. long, 0.8-1.2 cm. 

 wide, the upper somewhat smaller; inflorescence terminal, corym- 

 bose, lax; heads 4-25, on peduncles 0.5-4 cm. long; involucre 

 at maturity broadly campanulate or depressed-hemispheric, about 

 5 mm. high ; scales glabrous with membranous margins, the outer 

 lanceolate, sharply acuminate, the inner oblong, abruptly acumi- 

 nate or mucronate ; achenes 2 mm. long, striate, sparsely pubes- 

 cent ; pappus tawny, 6 mm. long, the outer series minute. 



Great Bahama, pine lands, Eight Mile Rocks, Feb. 5-13, 



1905, N. L. Britton & C. F. Millspaitgh 2jg2a, type, in fruit; 



same place and date, .V. L. Britton & C. F. Millspaitgh 2392, a 



more mature specimen with the achenes gone ; same place, April 



16-May 8, 1905, Z./. K. Brace j68j, young specimens only 2.5- 



3 dm. high, with the inflorescence just beginning to appear; 



