170 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Jacanillo. See Ardisia pendula. 
Jack plum. See Syzygium jambolanum 
Jack tree. See Artocarpus integrifolia. 
Jacquemontia tamnifolia. AGUINALDO PELUDO. 
Family Convolvulaceae; a twining herb found in dry places. (Stahl, 6: 171.) 
Jacquinia armillaris. BaRBasco. 
Family Myrsinaceae; ashrub 3 to 4 meters high; growsalong the coast. (Stahl, 
4: 40.) 
Jacquinia aristata. BARBASCcO. 
(Stahl, 4: 41.) 
Jacquinia berter1i. _ 
An indigenous tree of 6 to 8 meters; two subspecies, portoricensis and retusa, are 
described by Urban, both known only from the southwestern part of Porto Rico. 
(Urban, Symb. 1: 378.) 
Jacquinia umbellata. 
An indigenous shrub, maintained by Urban as distinct from J. aristata, to 
which it was referred by. Grisebach, known from Coama, Yauco, Maricao, and 
from between Sabana Grande and Guanica. 
Jagua. See Genipa americana. 
A tree from all parts of the island; height, 45 to 50 feet (14 to 15 meters); 
diameter, 10 to 12 inches (25 to 30 centimeters). . Wood white, hard; specific 
gravity 0.886; used in making packing boxes. (Exp. 1857.) 
Captain Hansard gives the specific gravity as 0.80 and says that it is a large tree. 
yielding good white boards; also a large oval fruit. 
Jaguey. 
A tree from all parts of the island; height, 40 to 45 feet (14 to 15 meters); diame- 
ter, 55 to 60 inches (130 to 150 centimeters). Wood ash-colored, soft; specific 
gravity, 0.485; used in making fishing canoes. (Exp. 1857.) 
In Cuba this name is applied to Ficus membranacea, a species not known to 
occur in Porto Rico. 
What is evidently another tree is described by Grosourdy under this name, and 
also called ‘*‘ mato palo,’’ which see. 
Jamaica cherry. See Ficus pedunculata. 
Jamaica bitterwood. See Picrasma excelsa. 
Jamaica mignonette tree. See Lawsonia inermis. 
Jamaica nutmeg. See Monodora myristica, the calabash nutmeg. 
Jamaica sorrel. See Hibiscus sabdariffa. 
Jambolin. See Syzygiwm jambolanum. 
Jambosa caryophyllus. See Caryophyllus aromaticus. 
Jambosa jambos. ROSE APPLE. POMA ROSA. 
A myrtaceous shrub or small tree native in the Malay region but now intro- 
duced in all parts of the Tropics and escaped from cultivation in many countries, 
In Porto Rico it isabundant in thickets, in waste places, and furnishes the material 
from which most of the larger baskets are made. Considerable amounts are 
also used for hoops of the large sugar casks. It yields also an edible fruit which 
has a pleasant odor like roses, whence the name. The long and narrow leaves 
resemble those of the peach and oleander. (Stahl, 4: 87, as Eugenia jambos). 
Grosourdy (2: 409) says that this tree reaches 40 feet in height and that the 
trunk attains a diameter of 15 to 18 inches. He also states that the wood is used 
to make charcoal for forges. 
Jambosa vulgaris. See Jambosa jambos. 

