Britton: Studies of West Indian Plants 13 



Molinas, Nipe Bay, Oriente {Shafer 1794), and also on Cayo 

 Romano, Camaguey {Shafer 2621). 



Spermacoce keyense Small, Flora Florida Keys 141. 11 Au 



1913 



Spermacoce floridana Urban, Symb. Ant. 7: 550. 15 Au 1913. 



From the printed dates of publication, Dr. Small has four 

 days priority. 



ACANTHOSPERMUM HISPIDUM DC. Prodr. 5: 522. 1836 



Island of Culebrita, Porto Rico {Britton & Wheeler 280). 

 30. ASTER IN THE WEST INDIES 



Scapose, the scapes monocephalous; leaves rosulate, linear- 

 oblong, pilose. 1. A. Grisebachii. 

 Caulescent, branched, polycephalous. 

 Rays large, surpassing the involucre. 



Leaves, except the basal ones, reduced to small im- 

 bricated scales; rootstocks tuberous. 2. A. adnatus. 

 Leaves normal, the upper often small, but distant. 

 Involucre-bracts densely pubescent, acuminate; 



inflorescence wand-like; rootstocks tuberous. 3. A. lucayanus. 

 Involucre-bracts glabrous or nearly so, or puberu- 

 lent; inflorescence paniculate; rootstocks 

 not tuberous. 

 Not fleshy, or but slightly so, at least the 

 lower leaves flat, linear to spatulate. 

 Involucre-bracts acuminate, glabrous. 4. A. bahamensis. 



Involucre-bracts obtuse or merely acutish. 

 Very densely leafy; involucre-bracts 



puberulent; rays white. 5. A. Burgessii. 



Not densely leafy; involucre-bracts 



glabrous. 6. A. dumosus. 



Fleshy; leaves all narrowly linear, thick, 



subterete. 7. A. Bracei. 



Rays small, little if at all surpassing the involucre. 

 Stem-leaves lancolate, 6-12 cm. long, 2 cm. wide or 



less. 8. A. inconspicuus. 



Stem-leaves linear to linear-oblong. 



Stem-leaves elongated-linear; involucre-bracts 



acuminate. 9. A. exilis- 



Stem-leaves oblong-linear; involucre-bracts acute. 10. A. squamatus. 



