COOK AND COLLINS—ECONOMIC PLANTS OF PORTO RICO. 265 
poses. Hill writes under the erroneous impression that the yagua palm is differ- 
ent from the royal palm. 
Yaiti. 
This is preferred to the spelling ‘‘jaiti.”’ This wood makes pretty walking 
sticks, half black and half white. It is a small shrub, growing on stony calcare- 
ous soil; specific gravity 0.94. (Captain Hansard.) 
Yam. See Dioscorea. 
Yam bean. See Pachyrrhizus tuberosus. 
Yaray. See nodes causiarum and Thringis laxa. 
Yautia. See Xanthosoma and Colocasia esculenta. 
Yautia amarilla. See Xanthosoma. 
Yautia blanca. See Xanthosoma. 
Yautia palma. See Xanthosoma. 
Yautia malanga. See Colocasia esculenta. 
Yaya. See Oxandra laurifolia. 
A hard wood; specific gravity, 0.74; not used much on account of its tendency 
to split. (Captain Hansard. ) 
Yayajabico. See Sarcomphalus retusus. 
Yellow yam. See Dioscorea cayennensis. 
Yerba capitana. See Phoradendron chrysocarpum, P. quadrangulare, and P. 
dichotomum. 
Yerba de burro. See EHlephantopus. 
Yerba de cabra. See Porophyllum macrocephalum. 
Yerba de cancer. See Ammannia latifolia and A. humilis. 
Yerba de clavo. See Jussiaea suffruticosa and Centella asiatica. 
Yerba de clavo acuatico. See Jussiaea repens. 
Yerba de clavo aguada. See Jussiaea linifolium. 
Yerba de clavo palustre. See Jussiaea palustris. 
Yerba de clavo peluda. See Jussiaea peruviana. 
Yerba de contrabando. See Alysicarpus vaginalis. 
Yerba de cotorra. See Heliotropium indicum. 
Yerba de cuarto. See Hydrocotyle umbellata and H, hirsuta. 
Yerba de culebra. See Bacopa monniera; also Heliotropiwm indicum. 
Yerba de culebra amarilla. See Bacopa chamaedryoides. 
Yerba de estrella. See Drymaria cordata. 
Yerba de faja. See Sparganophorus vaillantii. 
Yerba de guava. See Peperomia portoricensis and Coccocypselum repens. 
Yerba de Guinea. See Panicum maximum. 
Yerba de hicotea. See Polygonum acre and Castalia. 
Yerba de hierro. See Alectra brasiliensis. 
Yerba de lombrices. See Spigelia anthelmia. 
Yerba de papagayo. See Blechum brownei. 
Yerba de peo. See Porophyllum macrocephalum. 
Yerba de plata. See Rolandra argentea. 
Yerba de quarto. See Hydrocotyle wmbellata, 
