236 
Mature outer petals 3 cm. long or less, changing color, becoming deep black- 
purple at the time_of falling. 6. A. pygmaea, 
Mature outer petals 3.5 cm. long or more, not changing color, remaining 
yellowish white at the time of falling. 7. A. angustifolia 
1. ASIMINA TRILOBA (L.) Dunal, Monog. Anon. 83. 1817. 
Anonna triloba L, Sp. Pl. 537. 1753. 
Orchidocarpum arietinum Michx. Fl. Bor. Am. 1: 329. 1803. 
Porcelia triloba Pers. Syn. 2:95. 1807. 
Uvaria triloba Torr. & Gr. Fl. N. A. 1: 45. 1838. 
A small tree, 3-12 metres tall, the bark of the mature branch- 
lets reddish brown or sometimes gray. Branchlets and leaves 
when young, peduncles, exterior surface of the sepals and young 
petals tomentose with reddish brown hairs ; mature leaves obovate 
or obovate-cuneate, 10-30 cm. long, 4-11 cm. wide, abruptly 
acuminate at the apex, usually acute, but sometimes rounded at. 
the base, thin, glabrous above, the midrib and primary nerves, 
which are prominent on the lower surface, usually more or less 
pubescent; petioles 1 cm. long or less, glabrous or sparingly 
pubescent ; flowers in the axils of the deciduous leaves of the pre- 
ceding year, on peduncles 8-15 mm. long, which are often re- 
curved; sepals from ovate to orbicular-ovate, 8-12 mm. long; petals 
at first greenish, later purple and conspicuously veined, the outer 
ones nearly orbicular, 2-2.5 cm. long, more than twice the length 
of the sepals; fruit 7-15 cm. long, 2.5-4 em. thick, oblong, cylin- 
dric, when full grown at first hard, green and glaucous, later turn- 
ing yellow, and when fully ripe becoming soft and edible and 
brown or almost black in color; seeds brown, oblong, 2—2.5 cm. 
long, I-1.5 cm. broad, compressed, obtuse at the apex and usually 
obliquely truncate at the hilum. 
Rich and moist soil from western New York and Pennsylvania 
to southern Michigan and Kansas, south to middle Florida and 
eastern Texas. 
A large number of specimens of this, the most frequent and 
widely distributed species, were examined, but it is so well known 
that a detailed list is not necessary. | 
2. ASIMINA PARVIFLORA (Michx.) Dunal, Monog. Anon. 82. fi. 9- 
1817. 
Orchidocarpum parviflorum Michx. Fl. Bor. Am. 1: 329. 1803-. 
Porcelia parvifiora Pers. Syn. 2: 95. 1807. 
Uvaria parviflora Torr. & Gr. Fl. N. A. 1:45. 1838: 
