ANONAGEJE. 



217 



petals resembling them, have been termed " petals of tlie Xi/lopiea"' 

 The outer ones, alternate with the divisions of the calyx, are a little 

 larger than the inner ones, and are narrow and elongated, concave only 

 near the base, where each is marked internally by a little pit ; above 

 this they are thick, tapering, often connivent into an acute cone or 

 pyramid, or more rarely spreading after the expansion of the flower 

 (tigs. 2G2, 263). The interior petals, of nearly the same form, have tlie 



Xylopia grandijlura. 



—-J 



Fig. 262. 

 Expanded flower. 



Pig. 263. 

 Longitudinal section of flower. 



Fig. 264. 

 Flower, perianth removed. 



Fig. 266. 

 Longitudinal section of seed. 



basilar pit moulded on the convexity of the androceum, above which 

 they become triquetrous, and are united to one another by a large 



BuUiarda Neck., mem., n. 1103 (nee DC.).— 

 Xylopicron P. Bk., Jam., 250. — JVaria Aubl., 

 G.ian., 60-4, t. 2\Z.—IIahzeUa A. DC, Mem., 

 31.— ExDL., Gen., n. 4715.— C«/oc/(«e A. DC, 

 op. cif., 32. — Endl., Ge7i. n. 4716. — Fatonia 

 Wight, III. i. 18.— Habzelia Hook. & Tuoms., 

 FL IniL, i. 123.— B. H., Gen., 28, n. 33 (nee 

 A. DC). — Parartabotrys B. H., Gen., loc. cit. 

 (nee MiQ.). 



^ " Petala exteriora crassa, conniventia v. rix 

 aperta ; interiora hiclusa minora." B. H., 

 Gen., 22. 



^ In most flowers the petals, cohering into a 

 three-sided pyramid, fall altogether when they 

 become detached at the base. But it is cer- 

 tain that this is not always the case, and that 

 they may expand spontaneously when the flower 

 opens, as occurs in JT. (tthiopica, where their 

 summits alone diverge (fig. 261), and in certain 

 other species where they become free to the base. 

 In some species the form of the corolla is far nearer 

 that of the Unonece. We shall see below that in 

 the species of the section Vaeudaiioiia there is 

 also an abnormality in the structure of the corolla. 



