COOK AND COLLINS—ECONOMIC PLANTS OF PORTO RIGO. 229 
de Luquillo. It is amember of the family Rutaceae, to which the orange belongs. 
(Urban, Add. 3: 240.) 
Red bellflower. See Quamoclit quamoclit. 
Red sorrel. See Hibiscus sabdariffa. 
Reina de las flores. See Cereus grandiflorus. 
Renealmia. 
American tropical herbs, with creeping rootstocks, belonging to the family 
Zingiberaceae. 
Renealmia exaltata. 
Reported from Juncos, together with F. occidentalis. 
Renealmia racemosa. 
Grows to a height of 3 feet (1 meter) in moist woods; reported from Sierra de 
Lugquillo. 
Reseda. See Lawsonia alba. 
Originally the Spanish for the mignonette, but transferred in Porto Rico to 
the henna bush. 
Retama. See Cassia biflora, Chamaecrista portoricensis, and Sabinea florida. 
Retamo. 
A wild tree reaching 50 feet (15 meters) in height, with a trunk 18 inches (45 
centimeters) in diameter. Furnishes a white wood that breaks with an oblique 
fracture. Used as boards in the construction of rude houses, and for other pur- 
poses. (Grosourdy, 2: 412.) 
Retan. 
A tree from all parts of the island; height, 45 to 50 feet (13 to 15 meters); diam- 
eter, 15 to 20 inches (37 to 50 centimeters). Wood, white, hard; specific gravity, 
0.904; used in building houses. (Exp. 1857.) 
Retomo. 
Captain Hansard associates this name with Spartiwm scopariwmn, which is, 
according to the Kew Index, synonymous with Cytisus scoparius. Specific gravity 
of wood, 1.11. 
Ravenia urbani. 
A native species of Porto Rico, belonging to the family Rutaceae, from Sierra 
de Luquillo. 
Reynosia uncinata. CHICHARRON,. 
Family Rhamnaceae; a shrub or small tree of 8 meters; from limestone moun- 
tains about Ponce, Penuelas, and Guanica. R. krugii, a somewhat larger species 
comes from the vicinity of Fajardo and Cayey. (Urban, Symb. 1: 355.) 
Rheedia portoricensis. SEBUCAN. 
Also called ‘‘ guyabacoa.’’ Family Clusiaceae; a handsome tree of 10 to 20 
meters. The apexes of the thick, shining leaves are *»roduced into sharp points. 
Found by Sintenis near the seashore at Cangrejos; also reported on the northern 
coast from between Loiza and San Juan to Vega Baya and Manati; also in the 
eastern and southern parts of the islands. 
Rhexia mariana. CamMacrky-MARIANA. 
Family Melastomaceae; a herbaceous annual 20 to 30 centimeters high; found 
in sandy inundated plains. (Stahl, 4: 118.) 
Rhizophora mangle. MANGLE COLORADO. MANGROVE. 
Family Rhizophoraceae; a tree 30 to 50 feet (9 to 15 meters) high, forming the 
mangrove swamps along the coast. The wood is white, but when soaked in water 
turns red. Itis used in boat building and in making hogsheads, etc, (Stahl, 4: 
141.) 
