82 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Anona squamosa. SwEETSOP. ANON. CHERIMOLIA. 
A low tree or shrub widely cultivated throughout the tropics, though not con- 
sidered the equal of the soursop. According to Bello, the name **chirimoya”’ is - 
applied to this species in the western part of the island. (Stahl, 2: 26.) 
Anthacanthus spinosus. ESpPrINnosa. 
Family Acanthaceae; a shrub growing in thickets on the north coast, near Can- 
grejos, and also known from Humacao. (Stahl, 6: 246.) 
Antherylium rhorii. Rosa DE CIENEGA. 
Family Lythraceae; a much branched tree, 8 meters high, found on the south 
coast; also reported from the island of St. Thomas. (Stahl, 4: 123.) 
Anthurium acaule. PLATE XVII. 
Family Araceae; a herbaceous plant of no economic value sent in by all col- 
~ lectors. 
Antigonon leptopus. PLATE XVII. 
An ornamental climbing vine belonging to the family Polygonaceae. The 
clusters of showy pink flowers sometimes cover large areas and suggest the 
appearance of Bougainvillea, for which Antigonon is probably often mistaken. 
The beautiful pink color of the latter is, however, very different and much more 
beautiful than the rather unpleasantly conspicuous purplish tint of Bougain- 
villea. Antigonon is probably also superior as a rapid grower and a more 
effective climber. The flower clusters also serve as tendrils and shorten them- 
selves or ‘‘take in the slack’’ by bending at the joints in a zigzag form. The 
specimen photographed was taken at Coamo Springs, but the plant was seen at 
numerous places and has been collected by Sintenis at Fajardo. It is supposed to 
be a native of western Mexico. 
In Cuba the species is called ** coralillo’’ or * coralillo rosado,’’ but no common 
name has been recorded from Porto Rico. Another Mexican species, A. cinera- 
scens is reported as introduced into St. Thomas. 
Antirrhoea. 
A genus of rubiaceous shrubs. Several species have been collected by Sintenis 
in different parts of Porto Rico. 
Antirrhoea acutata. 
From Guanica. <A tree 5 to 8 meters in height from the southwestern part of 
the island; Ponce, Guanica, Cabo Rojo. (Urban,Symb. 1: 439.) 
Antirrhoea coriacea. QUINA. 
Also called ** boje.”*” A rubiaceous tree attaining 20 meters in height; known 
in the vicinity of Utuado and from several other localities: It has been placed 
by Stahl and other writers under Stenostomum, Exostemma, and other genera. 
(Urban, Symb. 1: 436.) 
Antirrhoea lucida. Pao LLORON. 
Family Rubiaceae; a shrub of 3 meters; locality not known. (Stahl, 5: 59) as 
Stenostomum lucidum. 
Antirrhoea obtusifolia. TorTUuGUILLO. 
A rubiaceous tree 8 to 15 meters in height. recently described as a new species 
from the mountains of Luquillo and Yabucoa. (Urban, Symb. 1: 435.) 
Antirrhoea resinosa. AQUILON. 
A tree 10 meters high; the branches covered with a sticky powder. Found in 
mountain districts; wood employed in building. (Stahl, 5: 58, as Stenostomum 
restuOsuM. » 
Antirrhoea sintenisii. 
Another new species from the vicinity of Manati. (Urban, Symb. 1: 438.) 
