68 ANONACE.-E. 



Fruit baccate, only one to three of the carpels ripening, 

 sessile or slightly stipitate, thick, oval or oblong, smooth and 

 even, or indistinctly torulose. Seeds horizontal, depressed, 

 in A. triloba occupying two regular series (4 to 9 in each), 

 in A. parviflora also several and more or less biseriate (in A. 

 pygmaea and A. grandiflora from the paucity of the ovules 

 undoubtedly very few or solitary), at maturity entirely in- 

 closed in a pulpy-membranaceous arillus ! nestling in the 

 soft flesh of the fruit : testa crustaceo-coriaceous, smooth and 

 even : inner integument rather fleshy, adhering to the testa, 

 its numerous folds or membranous appendages projecting 

 transversely into the corneous albumen nearly to the axis, 

 dividing it into lamella; (i. e. albumen ruminated). Embryo 

 minute, next the hilum, to which the cylindrical radicle is 

 directed: cotyledons short. 



Shrubs or small trees ; with alternate and entire feather- 

 veined leaves, conduplicate in vernation ; and solitary (ver- 

 nal) dingy-colored flowers from separate axillary buds, nod- 

 ding, on a short peduncle. Stipules none. Bud-scales mi- 

 nute and caducous. Pubescence rusty-color, caducous. 



PLATE 2B. Asimina triloba, Dunal ; — vernal branch in flower; nat- 

 ural size. (From Ohio, Sullivant, and Pennsylvania, Prof. Band.) 



1. Diagram of the floral envelopes (of the expanded flower). 



2. A sepal ; 3, an outer, and 4, an inner petal, natural size. 



5. A stamen, enlarged, seen from within ; and 0, from the outside. 



7. Stamens and pistils ; the calyx and corolla only removed. 



8. Enlarged vertical section, through the receptacle. 



9. Transverse section of a magnified ovary; 10, a vertical section. 

 11. An ovule, more magnified. 



PLATE 27. The fruit and seeds (fresh specimens from Prof. Baird). 

 1. Peduncle and receptacle bearing 3 ripe carpels ; natural size. 

 •J. Longitudinal section of a ripe carpel. 



3. Transverse section, showing two of the seeds in place ; one of them 



divided, showing the embryo at the base of the albumen (the lamel- 

 la; of which plainly extend nearly to the centre in the dried seeds). 



4. Detached seed, enveloped in its closed pulpy arillus. 



5. Same, with the arillus cut open and extended. 



6. Embryo, magnified. 



