BRITTON: STUDIES OF WEsT INDIAN PLANTS 13 
54. THE GENUS LEUCOCROTON GnriseEs. 
A Cuban genus, of which four species have been described. 
L. Wrightit Griseb. is the type species. 
A. Leaves pinnately veined. 
ves chartaceous. 
Pistillate inflorescence 1-flowered at the. summit; stami- 
t wers racemose. 
Pistillate flowers racemose, the staminate glomerate- 
spicate. 
al 
. L. Wrightii. 
2. L. flavicans. 
Leaves coriaceous, linear-oblong or linear. 
Leaves densely whitish-scurfy beneath. 
Leaves strongly revolute-margined, not reticulate- 
veined beneath, coarsely reticulate-veined above. 
Leaves slightly revolute-margined, strongly reticulate- 
veined beneath, finely reticulate-veined above. 4. L. saxicola. 
Leaves glabrous on both sides. 
Leaves mostly rounded and mucronulate at the apex, 
ull, 6-10 mm. wide. 5. L. angustifolius. 
Leaves emarginate, shining, 3-5 mm. wide. . L. linearifolius, 
B. Leaves palmately 5-veined. 4. L. vivens. 
3. L. revolutus. 
Oo 
1. LEucocroTtoN Wricutu Griseb. Abh. Kén. Gesell. Wiss. 
7 Gétting. 9: 21. 1860 
Woodlands and banks of streams, Oriente; Pinar del Rio. 
2. LEUCOCROTON FLAVICANS Muell. Arg. in DC. Prodr. 157: 757. 
1866 
L. flavicans latifolius Muell. Arg. loc. cit. 1866. 
L. flavicans angustifolius Muell. Arg. loc. cit. 1866. 
Serpentine hillsides, Matanzas, Havana. The locality of C. 
Wright’s no. 1994 is not recorded. 
3. LEUCOCROTON REVOLUTUS Wright; Sauvalle, Anales Acad. 
Habana 7: 154. 1870 
Known only from the type locality between La Mulata and 
La Palme, Pinar del Rio. 
4. Leucocroton saxicola sp. nov. 
A shrub, 1-3.3 m. high, much branched, the twigs short and 
stout. Leaves coriaceous or subcoriaceous, narrowly oblong or 
oblanceolate, 3-11 cm. long, 2 cm. wide or less, rounded or emar- 
ginate and apiculate at the apex, narrowed at the base, finely 
