oF ANNONACEAE 185 
subglobose, oval, or oblong one- to six-seeded berries, often more 
or less constricted between the seeds but never moniliform. Seeds 
horizontal, discoid, usually with a peripheral groove, the terminal 
ones depressed-hemispherical, or, if solitary, spheroidal ; endosperm 
ruminate and embryo minute, as in all Annonaceae. rubs or 
small trees with alternate short-petioled entire leaves, and yellow- 
ish or greenish solitary or geminate flowers, often very fragrant, 
on long slender curved pedicels borne by short, bracted, leaf- 
opposed peduncles, and followed by clusters of pedicelled berries. 
Type: DEsMopsiIs PANAMENSIS (Robinson) Safford. 
GEOGRAPHICAL RANGE: From the state of Vera Cruz, Mexico, 
to the Isthmus of Panama. 
This genus differs from the Old World Desmos in its peculiar 
bracted leaf-opposed inflorescence, the pilose indument of the 
torus between the stamens as well as between the carpels, the 
depressed-globose hairy styles, and the crowded discoid seeds 
marked with a peripheral groove, separated from each other by a 
slight constriction but never enclosed in a moniliform pericarp. 
In typical species of Desmos (Unona Vahl) the mature carpels are 
moniliform (Fic. 1) the seeds devoid of a groove round their 
periphery, and the styles are not hairy. 
Key to the species 
Leaves not acuminate, narrowed to an obtuse or rounded apex, 
oblong-lanceolate or rhomboid, glabrous or nearly so. 
Leaves acuminate. 
Lanceolate-elliptical, often unequal at the base, lower surface 
irtellous-tomentose. 
Elliptical or oblong, symmetrical at the base. 
Petals incurved at the tips; leaves rufous-pubescent along 
the midrib and nerves beneath. 
Petals not incurved at the tips; leaves almost quite gia- 
brous beneath. 
a. D. bibracteata. 
2. D. Galeottiana. 
1. D. panamensis. 
3. D. Maxonii. 
1. Desmopsis panamensis (Robinson) Safford 
Unona panamensis Robinson, Am. Jour. Sci. III. 50: 175- 1895- 
A small symmetrical tree 5-8 m. high with horizontal limbs and 
a straight trunk covered with brownish gray bark. Branches 
brown with lighter colored lenticels; young growth finely rufous- 
tomentose with simple hairs. Leaves short-petioled, oblong or 
elliptic, shortly acuminate, narrowed or cuneate at the base, entire, 
10-20 cm. long and 4.5-8 cm. broad, glabrous above, when young 
covered beneath with an appressed rufous silky pubescence, at 
length pubescent beneath only upon the nerves. Flowers greenish 
