a eel 
SAFFORD—CLASSIFICATION OF ANNONA. 19 
keel on the outer surface. The outer petals are keeled within or triquetrous 
above and concave at the swollen base, to inclose the essential parts. The 
stamens terminate in a broadly expanded connective and the ovaries, except at 
the base, are distinct, though crowded, and form a compact cone with their 
tapering, appressed, fleshy styles. The leaves are usually membranaceous, 
with a tendency in several species to conduplication. The peduncles are in 
groups of 2 or 3 or sometimes solitary, usually issuing from near the base of 
a new branchlet and never caulifloral. The leaflike amplexicaul bracts at the 
base of the peduncles which characterize the following section (Ilama) 
are absent. This section includes, in addition to the type species, the well- 
known chirimoya (Annona cheri- 
mola Mill.), the long-flowered 
chirimoya of Jalisco (A. longiflora 
S. Wats.), the common custard 
Fig. 27.—Annonea diversifolia. Leaves, 
Fic. 26.—Flower of Annona cherimola, Showing flower, and fruit. From type in U.S. 
essential parts and minute inner petal. Scale 4, National Herbarium. Scale 3. 
apple or bullock’s heart (A. reticulata L., fig. 25), and two new species to be 
described below: A. lutescens, the ‘‘anona amarilla” of Central America (pl. 23; 
figs. 49-52, pp. 42, 48) ; A. praetermissa of Jamaica; and A. palmeri, the dwarf 
wild Annona of Acapulco (pl. 24; figs. 53, 54, pp. 44, 45). 
Section 11. ILAMA Safford. 
Type species, Annona diversifolia Safford, commonly called “ilama” at 
Colima, Tlatlaya, and Acapulco (pl.5; fig. 27). 
Journ. Washington Acad. Sci. 2: 118. 1912. 
