POLYPETALOUS EXOGENOUS PLANTS. 303 



me7is 4-10, inserted into the margin of the disk that crowns 

 the ovary; ovules solitary, iinu,tYo\^o\xs, pendulous ;/rz/i^ a 

 berry-like 1-2-celled, 1-2-seeded drupe ; embryo nearly as 

 long as the fleshy albumen; cotyledons large and folia- 

 ceous. 



CORNUS, Tourn. DoGwoop ; Cornel. 



Flowers perfect ; calyx 4-toothed ; petals and stamens 4 ; 

 stigma capitate ; drupe 2-celled, 2-seedecl. — Shruls or low 

 trees ; leaves and branches opposite ; flowers in naked 

 spreading cymes, or capitate, and subtended by a colored 

 involucre. 



* Flowers white, in a loose open cyme ; involucre none. 



Alternifolia, L'Herit. Leaves oval, abruptly acute at 

 each end, pale and pubescent beneath, long-petioled, and, 

 like the greenish striped branches, alternate ; driqjes deep 

 blue. Banks of streams. — A widely branching sJirub or 

 small tree. 



C. STRLCTA, Lam. Leaves ovate or oblong, abruptly 

 acute or acuminate, smooth, whitish beneath ; cymes flat 

 or depressed at the summit; drupes and anthers pale 

 blue. Swamps. — A shrub or small tree ; branches brown. 



C. PANICULATA, L'Herit. Leaves smooth, ovate-lanceo- 

 late, acuminate, paler beneath ; cymes convex at the sum- 

 mit, somewhat panicled, loose-flowered ; driqyes white, de- 

 pressed-globose.— ^ArztJ 4°-8° high ; branches gray. 



0. SERiCEA, L. Leaves ovate or elliptical, smooth above, 

 the lower surface, like the purplish branches and close de- 

 pressed cyme, silky-pubescent; drupes pale blue. Low 

 woods.— ;S'/ir?^^ 6°-10° high. 



** Floioers cajMate, subtended by a white A-leaved involucre. 



C. FLORIDA, L. Leaves ovate-lanceolate or ovate, at 



