436 NATURAL JITS TOBY OF PLANTS. 



hypogynous disk or the foot of a gyna?ceum, with oppositipetalous 

 carpels united by their styles, independent or united for a variable 

 distance in the ovaiy. Ovules 2— oc, transverse or descending with 

 exterior and superior micropyle. Fruit in several shells (rarely 

 fleshy). Seeds albuminous, with ernbiyo often curved. — Herbs, 

 often fnitescent at base, whose divers organs, especially the leaves, 

 often pinnatisect, are'eovered with glandular, pellucid, fragrant spots. 

 Plants of temperate regions, especially the North. — (5 genera.) 



II. CusPARiEiE. 1 — Flowers regular, or oftener irregular, with con- 

 vex receptacle. Petals often united, or adhering between themselves 

 to a variable distance, forming a more or less elongated tube. 

 Androceum often diplostemonous, with stamens often united to a 

 variable distance with the tube of the corolla, all fertile, or more 

 generally partly sterile and rudimentary. Carpels generally free in 

 the ovary, containing two descending ovules, with exterior and supe- 

 rior micropyle. Fruit generally formed of independent shells, with 

 elastic dehiscence, the endocarp separating from the exocarp. Seeds 

 albuminous or exalbuminous, with cotyledons more or less convolute. 

 — Generally wood plants, usually glandular-punctuate, inhabiting 

 tropical America. — (9 genera.) 



III. Diosme/E. 2 — Flowers regular, generally small, hermaphrodite, 

 with receptacle convex, or more or less concave, edged by a peri- 

 gynous or hypogynous disk. Petals free, often with erect claw. 

 Androceum isostemonous or diplostemonous, inserted outside the 

 disk, the oppositipetalous stamens sometimes sterile. Grynseceum 

 formed of 1-5 oppositipetalous carpels, generally free in the ovaiy, 3 

 the st}des united into a common column. Ovules two in each carpel, 

 descending with superior and exterior micropyle. Shells often 

 rostrate, with separable endocarp. Seeds exalbuminous ; embryo 

 thick and straight, with fleshy cotyledons. — Ericoidal shrubs of 

 South Africa, with narrow leaves, 4 often imbricated, simple, coria- 

 ceous, punctuate. — (11 genera.) 



IV. Boronie^. 5 — Flowers generally constructed 6 like those of 



1 Cusparieee "DC., in Mem. Mus., is. 141 4 The leaves of Calodendron are single, wide, 

 (1822). — Endl., loc. cil., 1150, Trib. 1.— AG., and membranous. 



op. cit., 221, t. 19. s Boroniece Baetl., Orel. Nat., 3SS. — 



2 Diosmece R. Br., in Fliml. Voy. (1814), ii. Endl., Gen., 1154, Trib. 4.— Ag., op. cit., 

 545. — A. Juss., loc. cit., 883.— Baetl., Ord. 229.— B. H., Gen., 291 .—Diosmece Australa- 

 Nat., 386.— Endl., Gen., 1149, Ord. 251.— B.H., sicce A. Juss., loc. cit. — Diplolcenece Ag., loc. cit. 

 Gen., 288, Trib. 3.— Ac;., op. cit., 229, t. 19. 6 Except tbose of Diplolcena, which are 



3 Except in Calodendron. destitute of a true calyx. 



