98 FLORA OF ST. CROIX AND THE VIRGIN ISLANDS. 



812. Halophila Baiilonii, Ascliers. (in Neumayer, 1. c. p. 307). 



Rhizome creeping, thin. Leaves oval, denticulate, whorled or oppo- 

 site, 3'" long, \y n broad. Monoecious. 



Fl. $ : 3 membranaceous white bracts; 1-3 stamens; filament -|'" 

 long; anther cylindrical, yellowish, glabrous, 1-celled. Pollen- 

 grains fusiform. 



Fl. $ : 3 persistent bracts, as in $ . Ovary sessile, ovate, \"' long, 

 -loculate. Style bifid, 2J'" long; branches pointed, often of 

 unequal length. Capsule oval, glabrous, 1'" long ; seeds about 

 20,- globose, hard, tessellate on the surface. Starch-grains trian- 

 gular. 



Male flowers very rare compared to the number of female ones. 

 Fl. all the year round. Gregarious on the bottom of the seaon coarse 

 coral sand in a depth of from two to four fathoms, here and there. St. 

 Thomas (harbour). 



813. Ruppia rostellata, Koch. 



Fl. all the year round. Gregarious in shallow rivulets, not uncom- 

 mon. St. Croix (King's Hill Gut, in company with a species of Chara) ; 

 St. Thomas (Tutu Gut, Krebs in Hb. Havn.). 



[Another Potamea, possessing a creeping rhizome and delicate linear 

 leaves, has been found by me in the harbour of St. Thomas at a depth of 

 from 3 to 6 fathoms, but on account of only sterile (Specimens having been 

 obtained it remains as yet undetermined.] 



AROIfi>E/E. 



814. Anthurium Huegelii. Schott (v. Boyer) (A. acauJe, Sch.). 



Fl. July-March. Young radical leaves very diiferent from the older 

 ones, being lanceolate and long-petioled. I consider Schottfs A. acaule 

 not to be specifically distinct from this species. On rocks and trees, not 

 uncommon, often gregarious. All islands. 



815. A. macrophyllum, Sch. 



Fl. July- Dec. Among rocks in forests, uncommon. St. Jan (near 

 Bethania). 



81G. A. cordifclium, Kth. (v. Wild Tanier, Maroon Jancolo) (Bot. Mag. t. 2801, 5801 

 being a misprint in Gris. Fl. p. 508). 



Fl. July-Nov. Among rocks in forests, gregarious, here and there. 

 St. Croix (Wills Bay, Blue Mountain) ; St. Jan (Macumbi, 1200'). 



817. Dieffenbachia Seguine, Sch. (v. Dumb Cane). 



Fl. May-Dec. In moist places on hio-h hills, uncommon. St. Thomas 

 (Caret Bay, 1000'). 



