SAFFORD—CLASSIFICATION OF ANNONA. 18 
Section 6. GAMOPETALUM sect. nov. 
Type species, Annona cornifolia St. Hil. (pls. 18, A, 20). 
This section is distinguished from all others by its gamopetalous flowers, 
the corolla (fig. 17) being composed of 3 broad and 3 narrow lobes, the edges 
of the latter, corresponding to inner petals, lapped over by those of the former. 
It is further distinguished by the connectives of the stamens (fig. 17, c), which 
have a broad terminal head expanded above the pollen sacs and echinulate, 
very much like those of the section Pilannona ; by the ovaries, which (fig. 17, d@) 
are quadrangular-prismatic and very closely crowded but distinct in the flower; 
and by the fleshy, 4-cornered styles, constricted at the base, terminating in 
swollen, ovoid or spheroid stigmas, those on the periphery of the gynecium 
being velvety or clothed with minute glandular hairs, the inner ones less hairy 
’ 
Fie, 16.—Flower of Annona holose- Fic. 17.— Annona nutans and A. cornifolia. 
ricea, with two petals removed, a, a, Twig of Annona nutans with geminate 
Carpel; 0b, stamen. From _ type flowers; b, leaf and flower of A. corni- 
specimen. Flower, scale 4; a, b, folia; c, stamens, and d, ovaries of A. 
scale 12, nutans, a, vb, Natural size; c, scale 10; 
d, scale 20, 
or minutely papillose, all of them cemented in a solid mass after pollination 
and soon becoming detached from the ovaries. From the peculiarities of the 
essential parts and from the general habit of growth this section appears to 
be allied to Pilannona; in the gamopetalous corolla it seems to form a link 
between the genera Annona and Rollinia. Ia addition to the type this section 
includes the closely allied Annona nutans Fries, of Paraguay (pl. 21), A. 
spinescens Mart., and probably A. walkeri 8S. Moore. Annona fagifolia St. Hil. 
& Tul. of Southern Brazil, is also gamopetalous, the 3 inner petals adnate to 
the outer connate petals near the base. This species, though not very close to 
A. cornifolia, must also be placed in this section. The fruit of the type species 
is about the size of a hen’s egg, ovate-globose, and of a bright orange red color 
