50 ANONACE^E. (CUSTARD-APPLE FAMILY.) 



thick evergreen leaves, which are shining and deep green above and rusty- 

 colored beneath), are the only remaining North American species. The former 

 is hardy as far north as Cambridge. One tree of the latter bears the winter 

 and blossoms near Philadelphia. The Umbrella-tree attains only a small size 

 in New England, where M. macrophylla is precarious. ' 



2. LIBIOD^INDRON, L. TULIP-TREE. 



Sepals 3, reflexed. Petals 6, in two rows, making a bell-shaped corolla. An- 

 thers linear, opening outwards. Pistils flat and scale-form, long and narrow, 

 imbricating and cohering together in an elongated cone, dry, separating from 

 each other and from the long and slender axis in fruit, and falling away whole, 

 like a samara or key, indehiscent, 1 - 2-seeded in the small cavity at the base. 

 Buds flat, sheathed by the successive pairs of flat and broad stipules joined at 

 their edges, the folded leaves bent down on the petiole so that their apex points 

 to the base of the bud. (Name from \ipiov, lily or tulip, and $evdpov,tree.) 



1. L. Tulipifera, L. Eich soil, S. New England to Michigan, Illi- 

 nois, and southward. May, June. A most beautiful tree, sometimes 140 

 high and 8 - 9 in diameter in the Western States, where it is wrongly called 

 POPLAR. Leaves very smooth, with 2 lateral lobes near the base, and 2 at the 

 apex, which appears as if cut off abruptly by a broad shallow notch. Petals 2' 

 long, greenish-yellow marked with orange. Cone of fruit 3' long. 



ORDER 3. ATVONACEJE. (CUSTARD-APPLE FAMILY.) 



Trees or shrubs, with naked buds and no stipules, a calyx of 3 sepals, 

 and a corolla of 6 petals in two rows, valvate in the bud, hypogynous, poly- 

 androus. Petals thickish. Anthers adnate, opening outwards : fila- 

 ments very short. Pistils several or many, separate or cohering in a 

 mass, fleshy or pulpy in fruit. Seeds anatropous, large, with a crusta- 

 ceous seed-coat, and a minute embryo at the base of the ruminated 

 albumen. Leaves alternate, entire, feather-veined. Flowers axillary, 

 solitary. Bark, &c. acrid-aromatic or fetid. A tropical family, except 

 one genus in the United States, viz. : 



1. A S I M I ]ST A , Adans. NORTH AMERICAN PAP AW. 



Petals 6, increasing after the bud opens ; the outer set larger than the inner. 

 Stamens numerous in a globular mass. Pistils few, ripening 1-4 large and 

 oblong pulpy several-seeded fruits. Seeds horizontal, flat, enclosed in a fleshy 

 aril. Shrubs or small trees, with unpleasant odor when bruised ; the lurid 

 flowers solitary from the axijs of last year's leaves. (Name from Asiminier, of 

 the French colonists.) 



1. A. triloba, Dunal. (COMMON PAPAW.) Leaves thin, obovate-lan- 

 ceolate, pointed ; petals dull-purple, veiny, round-ovate, the outer ones 3-4 

 times as long as the calyx. Banks of streams in rich soil, W. New York and 

 Perm, to Illinois and southward. April, May. Tree 10 -20 high; the 



