V0CHY8IACEM. 07 



the petal and the stamen, and becomes what was formerly called 

 adherent. There is only one cell, in which two collateral ovules are 

 found, inserted upon the wall, on the side of the petal and fertile 

 stamen, incompletely anatropous and ascending, with the micropyle 

 directed outwards and downwards.' The style is single, slightly 

 swollen at the stigmatiferous apex. The fruit is dry, indehiscent, 

 applied obliquely in the concavity of the receptacle, with whose 

 wall it is blended on one side, being surmounted by 

 five sepals, unequally accrescent in coriaceous, reticulated wings, 

 more or less falciform. In the cavity of the fruit are one or two 

 narrow elongated seeds, whose coats cover a slightly arched embryo, 

 with long narrow cotyledons, demi-cylindrical, having a short 

 inferior radicle ^ (fig. 137). Erisma, of which there are three or 

 four species,^ consists of trees from norLhern Brazil or Guiana. 

 The leaves are opposite, petiolate, coriaceous, accompanied by 

 membranous stipules, caducous or persistent ; and the flowers are 

 disposed in terminal ramified racemes, of cymes, the pedicels bearing 

 two lateral bracts. 



III. TEIGONIA SEEIES. 



Trigonia^ (fig. 138-142) has irregular hermaphrodite flowers, 

 whose receptacle is flat or slightly concave at the summit, generally 

 cut a little obliquely from above downwards, and from behind for- 

 wards. It bears five unequal sepals, quincuncially imbricated in the 

 bud, and five alternate dissimilar petals, also imbricated in praeflorar 

 tion. One of them is dilated above the base into a sac or short 

 spur, and is placed laterally as regards the anterior-posterior plane 

 of the flower.* Two others, • symmetrical as regards each other, 

 situated on the sides of the preceding, are thick and gibbous on one 

 side. The two latter are also like each other, falling back outwardly 



1 Consequently looking backwards. • Q-cn. 253.— Lamk, III. t. 347.— Poiu. Diet. 



2 It is a mistake that Payer (ioc.«<. fig. 262) viii. 97.— DC. Prodi: i. 571.— A. S. H. et 

 has represented the ovule as descendent with MoQ. in Mem. M-is. xviii. t. 31, fig. 3.— 

 superior micropyle, and that Bentham and Endl. Qm. n. 5659.— H. Bx. in Pagrr Fam. 

 Hooker have described the radicle as superior. Nat. 352.— B. H. Gen. 977, n. %.—Mamea Vel- 



3 Hart, et Zuco. Nov. Gen. et Spec. i. 136, Loz. Fl. Flum. vii. 275, n. 264, t. 8. 



t. 82.— Eeiche. Ic. Exot. t. 161.— Pcepp. in ^ On the floral symmetry of Trigonia and 



Fror. Not. xxxv. 120.— Walp. Hep. ii. 69. Ziffhtia, and on the two symmetnoal plans of 



4 AUBL. Ouian. I 390, t. 149, 150.- J the flower, see H. Ex. in Adamonia, xi. 23. 



VOL. V. 







