10 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
the names Annona rodriguesti (figs. 12, 18) and A. macrocarpa, belong to this 
section. 
Some confusion exists as to the identity of Annona rodriguesit and A. 
macrocarpa, described by Rodrigues, both of which are referred by Robert B. 
Fic. 11.—Annona involucrata, showing in- 
volucral envelope of inflorescence. From 
specimen in U. S. National Herbarium. 
Scale 4. 
Fries to Martius’s A. crassiflora. It is 
not surprising that Rodrigues should 
have been misled, for the plant figured 
by Martius as A. crassiflora* does not 
correspond with his description of that 
species. According to the latter the 
fruit of A. crassiflora is a typical cabeza 
de negro, with “sharply umbonate” 
areoles and not smooth as depicted in 
the figure, and the leaves “ shortly and 
obtusely acuminate or rounded at the 
apex,” instead of emarginate, while the 
recurved peduncles, 4 inch long, shown 
in the figure, correspond with Martius’s 
description of his A. coriacea. 
As seen by the accompanying illustra- 
tions (figs. 12, 13) the flower of Annona 
rodriguesii has very thick outer petals 
and smaller inner petals, very much as 
in A. purpurea, and the large subglo- 
bose fruit with its grooved, stout protu- 
berances is also much like that of the 
Venezuelan manirote (A.purpurea). Its 
pulp is described as very fragrant wheu 
ripe, of an agreeable sweet taste, and so aromatic that it imparts a spicy odor 
to the urine of those who eat of it in abundance. 
The name of this section is suggested 
by the form of the fruits, the protu 
berances of which, like short crisp curls, 
have caused them to be named “ cabeza 
de negro,” or “ negro-head.” 
Group IJ. PruagFLoRAr (SILKY 
ANNONAS). 
(Section Pilaeflorae Mart., amended.) 
Flower buds globose or depressed-globose 
(oblate) ; petals 3 or 6, the outer broadly 
ovate or orbicular, concave, valvate (ex- 
cept in section 6), and in most cases 
sericeous-pubescent on the outside, the 
inner when present much narrower and 
somewhat shorter than the outer, neither 
valvate nor imbricate, but performing the 
function of weather strips to cover the 
cracks between the outer petals; in sec- 
tion 6 the outer and inner petals united 
to form a 6-lobed gamopetalous corolla, the 3 outer broad petals open in estiva- 
Fic. 12.—Leaf and flower of Annona rod- 
riguesii. 
After Rodrigues. 
tion and overlapping the edges of the 3 inner and narrower lobes. 
Scale 3. 
* Mart. Fl. Bras. 13°: pl. 2. 1841. 
