24 PROCEEDINGS OF THE NATIONAL MUSEUM, VOL. 62, 
venient form genus Apocynophyllum, which has many described 
species. None of these merit especial comment in the present 
connection. 
Occurrence.—14 km. west of the telegraph station, San Jose del 
Carmen, State of Vera Cruz. 
Holotype.—Cat. No. 36838, U.S.N.M. 
Genus ALLAMANDA Linnaeus. 
ALLAMANDA CARMENENSIS, new species. 
Plate 7, fig. 2. 
Leaves of medium size; broadly lanceolate in outline; widest me- 
dianly, and tapering equally to the similarly acute apex and base. 
Margins entire, full and evenly rounded. Texture subcoriaceous. 
Length about 12 cm. Maximum width about 4 cm. Petiole miss- 
ing. Midrib stout, straight and prominent. Secondaries thin, nu- 
merous, equally spaced, subparallel; they diverge from the midrib, 
alternately, at angles of about 45°, sweep upward in long ascending 
curves, and end camptodromely. ‘Tertiaries obsolete. 
This characteristic leaf is clearly referable to the Apocynaceae, 
and its resemblance to the leaves of the existing species of Allamanda 
appears to warrant its reference directly to that genus instead of to 
the form genus Apocynophyllum. Allamanda comprises about a 
dozen existing species of trees or shrubs, the latter often climbing in 
habit. Their range extends from the Antilles and Central America to 
Brazil, and they are especially characteristic of the South American 
tropical rain forest. The only previously described fossil species is a 
somewhat similar one from the lower Miocene of Chile.*4 
Occurrence.—1}4 km. west of the telegraph station, San Jose del 
Carmen, State of Vera Cruz. 
Holotype.—Cat. No. 36839, U.S.N.M. 
Order PERSONALES. 
Family BIGNONIACEAE. 
Genus CRESCENTIA Linnaeus. 
CRESCENTIA CUCURBITINOIDES, new species. 
Plate 5, fig. 2. 
Leaves obovate in general outline, with acute tip, and gradually 
narrowed, cuneate base. Margins entire. Texture subcoriaceous. 
Length about 13.5 cm. Maximum width, above the middle, about 
5.25 cm. Petiole missing. Midrib prominent on the under side of 
the leaf, stout, curved. Secondaries stout, widely spaced, about 
34 Engelhardt, H., Abh. Senck. Naturf. Gesell., vol. 16, p. 658, pl. 6, fig. 4, 1891. 
