154 



NATURAL HISTORY OF PLANTS. 



Artocarpus integrifolia. 



free on the surface of the receptacle, whilst the females are more or 

 less deeply sunk in pitlike depressions (fig. 117) of which the 

 gynsecium occupies the bottom without contracting any adherence 



with their integuments. Some twenty spe- 

 cies ^ of Artocarpus have been distinguished, 

 all natives of tropical Asia and Oceania. 



Acanthinophyllum strepitans^ a small Brazi- 

 lian tree, with prickly leaves, like those of 

 certain Sorocea^ has nearly all the characters 

 of Artocmpus ; but its monandrous male 

 flowers are said to be destitute of perianth 

 and the female flowers are collected, though 

 not mutually adherent, on the surface of the 

 spherical receptacle. The fruit is sur- 

 rounded by the perianth become pulpy and 

 encloses a seed with straight embryo and 

 plano-convex cotyledons. There appears to 

 to be no perianth properly so called in the male flowers of Pararto- 

 carpuSy a tree of Borneo, the spherical and pedunculate receptacle of 

 which bears erect stamens separated from each other by bracts 

 variable in number, free, obtuse or swollen at the summit and 

 marginally contiguous. Below the receptacle, the summit of the 

 peduncle is enlarged and bears a small involucre of unequal folioles. 

 The female flowers of this genus are not known. The male inflo- 

 rescence of Treculia has also a spherical receptacle ; the stamens are 

 two to four in number in each flower. The style is divided above 

 into two thick stigmatiferous branches, and the fruit, imbedded in a 

 large common spherical receptacle, encloses a seed the embryo of 

 which has two very unequal cotyledons, the larger reflexed upon 

 itself to envelop the smaller. Treculia comprises trees of tropical 

 western Africa. The flowers are monoecious or dioecious, and the 

 receptacle which bears them is accompanied at the base by a small 



L^l 



Fig. 118. Long. sect, of 

 young female flower. 



1 FoRST. Prodr. 64 ; De Plant. Esc. Oc, 23.— 

 W. Spec. iv. 188.— Spreng. Syst. iii. 804.— 

 Tuss. Fl. des Ant. t. 2-4.— Wight, Icon. t. 678- 

 682. — Kl. Linncea, xx. 535. — Hassk. Flora, ii. 

 18.— ZoLL. Verz. ii. 89.— Boj. Hort. Mam: 290. 

 —Hook. Sot. Mag. t. 2833, 2834, 2869-2871.— 



Mia. Fl. Jungh. 44. Mart. Fl. Bras. Ortic. 121 ; 

 Fl. Ind.-Bat. i. p. ii. 284 ; Suppl. i. 171, 417.— 

 Teysm. et BiNN. in Nat. Tijdschr. Ned. Ind. xxv. 

 401. — Kruz, op. cit. xxvii. 182. — Thw. Enum. 

 FL Ztyl. 262.— Benth. Fl. HongJc. 325.— Seem. 

 Fl. Fit. 255.— Walp. Ann. i. 658. 



