44 



ANONACE.E AND BERBERIDACE^ 



[CH. 



but one seed (some species of Uvaria, Guatteria, &c.). 

 They thus form an seterio of Berries. 



In others the carpels are free (apocarpous) in the 

 flower, but fuse as they ripen to a fleshy aggregate a 

 sort of compound berry (Anona, Duguetia, Ararocarpus, 

 &c.) often called "Custard Apple," "Bullock's Heart," 

 " Sour-Sop " (Fig. 45), &c., in the flesh of which the seeds 

 are embedded. 



Fig. 46. Berberidaceous fruits and seeds. A, Podophyllum peltatum, 

 fruit cut transversely and longitudinally. B, Jeffersonia diphylla, Pers., 

 fruit. C, Ibid., seed; a, aril (4/1). D, Epimedium alpinum, L, fruit. 



E, Leontice Leontopetalum, L, longitudinal section of fruit ; a, pericarp. 



F, Achlys triphylla, DC, fruit (3/1). G, Berberis vulgaris, L, longitudinal 

 section of fruit and seeds ; a, endosperm. e, embryo ; /, pericarp ; , 

 stigma; p, placenta; a, seed (E and P). 



The Berberidacese give another interesting set of 

 examples, especially showing the variations possible with 

 one free carpel. 



