36 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
peduncle. The bracteole on the peduncle of the larger flower is scarcely per- 
ceptible in the photographs. The approximate lateral nerves and the parallel 
veins between the lateral nerves suggest the leaves of A. purpurea Moc. & 
Sessé, but the broad-clawed, imbricate inner petals of the latter separate that 
and its close allies from the present species, in which the inner petals are 
narrow and appear simply to play the 
part of weather strips. 
EXPLANATION OF PLATES 17, 18,.—PI. 17, 
photograph of Annona paludosa, Leprieur’s 
specimen as cited. Natural size, Pl. 18, A, 
flower of Annona cornijfolia, being a back 
view of specimen shown in plate 20; B, 
flower of Annona paludosa. <A, scale 2; B, 
scale 2.5, 
Annona jahnii Safford, sp. nov. 
Section Pilannona. A flat-crowned 
BY , tree with spreading branches, 4 to 6 
Fig. 44,—Base of leaf of Annona jahnit, meters in height; young branches 
Also detached solitary and fascicled rufous-pubescent, at length glabrescent. 
sate ea natural size; hairs, the bark brown, longitudinally plicate, 
and bearing a few inconspicuous brown 
lenticels; leaf scars lined with dense rufous pubescence; hairs solitary or 
fascicled in tufts of 2 to 4, not stellate; leaves yellowish green when fresh, 
membranaceous, pellucid-punctate, broadly obovate to obovate-oblong, acumi- 
nate, with the narrow apex acute or rounded, rounded or acutish at the 
base, 12.5 to 18 cm. long and 7 to 10 cm. broad, above pubescent at first, 
at length glabrate except along the impressed midrib and lateral nerves 
(10 to 14 on each side), beneath persistently 
rufous-pubescent, densely so on the promi- 
nent midrib, lateral nerves, and anasto- 
mosing veins; hairs fascicled or solitary; 
petiole 6 to 8 mm. long, grooved «above, 
densely rufous-pubescent like the midrib; 
peduncles solitary, extra-axillary, 12 to 15 
mm. long, issuing from the young branches, 
clothed with rufous hairs and bearing a 
small, broad, sessile or subamplexicaul, pu- 
bescent bracteole near the middle; calyx 
rufous-pubescent on the outside, quite gla- 
brous within, gamosepalous, subtriangular, 
with the 8 lobes long-acuminate; corolla sub- 
globose or broadly pyramidal in bud, about 22 
mm. in diameter; petals 3, valvate, very thick, broadly ovate, somewhat cordate 
at the base, 20 mm. high and 18 mm. broad, clothed on the outside with fine 
olivaceous appressed pubescence scarcely apparent without a microscope, lined 
within with grayish tomentulum and bearing the imprints of the stamens, inner 
petals entirely absent; torus convex or dome-shaped, densely clothed with short 
erect straight yellowish white hairs; stamens numerous, 2.5 to 2.8 mm. long, 
the parallel pollen sacs filled with lemon yellow pollen grains in 2 rows of 
tetrads and capped by the expanded brown-velvety apex of the connective, 
muriculate under the microscope; gyncecium depressed-conoidal; carpels (in- 
cluding the styles) 2.6 to 2.8 mm. long, free, the ovary clothed with appressed 
ial 
Fia. 45. 
of Annona jahnii. Scale 13. 
(a) Stamens and (b) carpel 
