266 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Yerba de San Juan. See Pectis humifusa. 
Yerba de San Martin. See Sauwvagesia erecta 
Yerba guinea. See Panicum maximum. 
Yerba graciosa. See Ilysanthes riparia. 
Yerba lanuda. See Gnaphalium purpureum. 
Yerba maravilla. See Ruellia coccinea. 
Yerba mora. 
In Cuba this name is applied to Solanum nigrum. 
Yerba oldenlandia. See Oldenlandia corymbosa. 
Yerba para. See Panicum molle. 

Yerba parrera. See Gesneria portoricensis. 
Yerba porosa. See Porophyllum ruderale. 
Yerba rosario. See Aeschynomene. 
Stahl applies this name to three species, sensitiva, americana, and glandulosa; 
the last stands as a synonym of the second in the Index Kewensis. 
Yerba veronica. See Gerardia domingensis. 
Yuea. See Wanihot utilissima and M. aipi. 
Yucca. 
In books on Porto Rico this is usually an erroneous spelling for yuca, the cur- 
rent name for the cassava, manioc, or mandioca plant, Manihot utilissima. The 
name yucca belongs to a genus of liliaceous plants of which the Spanish bayonet, 
Yucca baccata, is perhaps the best-known example. 
Yuquilla. See Waranta arundinacea. 
In Cuba this name is applied to Curcwma longa and, in combination, to several 
species of Zamia, presumably because employed in the production of starch, but 
in Porto Rico we heard it also in connection with Maranta. It is the diminutive 
of yuca, doubtless in allusion to the similarity of the thickened rootstocks to the 
roots of cassava. 
Zagrumo hembra. 
A tree from all parts of the island; height, 25 to 30 feet (7 to 9 meters); diame- 
ter, 8 to 10 inches (20 to 25 centimeters). Wood white, soft; specific gravity, 
0.513; not used. (Exp. 1857). . 
Zagrumo macho. 
A tree from all parts of the island: height, 25 to 30 feet (7 to 9 meters); diame- 
ter, 8 to 10 inches (20 to 25 centimeters). Wood white, soft; specific gravity, 
0.243; not used. (Exp. 1857). 
Zaiti. 
A tree from the eastern part of the island; height, 25 to 30 feet (7 to 9 meters); 
diameter, 18 to 20 inches (45 to 50 centimeters); wood yellow, very hard; specific 
gravity, 0.983; used in making furniture. (Exp. 1857.) 
Zaiti negro. 
A tree from the east end of the island; height, 25 to 30 feet (7 to 9 meters); 
diameter, 8 to 10 inches (20 to 25 centimeters); wocd dark yellow, very hard; 
specific gravity, 1.200; used in making furniture. (Exp. 1857.) 
Zambumbia. 
According to Ober, a Porto Rican drink made by diluting cane juice. 
Zamia portoricensis. MAruNGuUAY. 
Family Cycadaceae; a narrow-leaved species recently described by Urban from 
the vicinity of Guanica. (Urban, Symb. 1: 291.) 

