53 



NATURAL HISTORY OF PLANTS. 



calyx with five deep divisions imbricated in the bud,^ and five alter- 

 nate petals whose prsefloration is contorted or imbricated. The 

 androceum is formed of ten stamens, superposed five to the divisions 

 of the calyx and five shorter to the petals, in one species from 



Soumiri arenarium. 



Kg. 88. Flower-bearing and fruit-bearing branch. 



tropical "Western Africa, S. ffabonensis, of which we had at first made 

 the type of a particular genus under the name otAubrya? The stamens 

 are all fertile and free or united to a variable height by the base of 

 the filaments, and they have a bilocular introrse anther, whose cells 

 each dehiscing by a longitudinal cleft are applied below and within 

 to a thick connective conical and flattened, whose summit much 

 surpasses them in height.^ In certain American species which have 



209 ; in Payer Fam. Nat. 262. — Myrodendron 

 ScHBEB. Gen. 358 (incl. ; Aubrya H, Bn. Helleria 

 Nees et Makt. SaecogloUis Mabt. Vantanea 

 AuBL. F««teneo j(fo« Eich. Werniseckia&coi^.). 



1 So muoli smaller as they are more exterior 

 in prsefloratiou. In Vantaneoides of Eichaed (H. 

 Bn. in Adantonia, x. 369), the sepals are imbri- 

 cated ; but in the true Vataneas, as V. guianensis 



Attbl. the teeth of the calyx do not even touch 

 each other. 



^ H. Bn. in Adansonia, ii. 262 ; x. 368. — B. 

 H. Gen. 988, n. 2. a.— Olit. Fl. Trap. Afr. i. 

 275.— W ALP. Ann. vii. 464. 



' H. MoHL (in Ann. So. Nat. ser. 2, iii. 336) 

 describes the pollen as : " ovoid ; three folds ; in 

 these are the papillae ; in water spherical, trian- 



