RHAMNACE.E. (BUCKTHORN FAMILY.) 75 



5. C. sicyoides, L. Pubescent ; leaves entire, oblong-ovate, cordate, 

 2' -4' long, setaceously serrate, longer than the small trichotomous cymes; 

 petals 4 ; styles long and slender; berries globose, 1-seeded. Low banks, 

 South Florida, Stem climbing high. Leaves succulent. 



3. AMPELOPSIS, Michx. VIRGINIAN CREEPER. 



Flowers perfect. Petals 5, thick, spreading. Style short, conical. Disk 

 none. Stem climbing by expansion of the ends of the tendrils. Leaves 

 digitate. Flower in corymbose cymes. Berry small, globose. 



1. A. quinquefolia, Michx. (VIRGINIAN CREEPER.) Low grounds. 

 June. Stem climbing by lateral tendrils. Leaflets 5, oblong-obovate, ser- 

 rate above the middle, smooth. Berry small, dark blue. 



ORDER 38. RHAMNACE^E. (BUCKTHORN FAMILY.) 



Trees or shrubs, with simple mostly stipulate leaves, and small 

 regular perigynous greenish or whitish flowers. Sepals 4 - 5, united 

 below, valvate in the bud. Petals alternate with the sepals, concave 

 or hooded, sometimes wanting. Stamens opposite the petals, and in- 

 serted with them into the margin of a fleshy disk, which lines the 

 base of the calyx. Ovary 1 - 4-celled, with a solitary erect anatro- 

 pous ovule in each cell. Style single. Fruit drupaceous. Embryo 

 large, in the axis of scanty fleshy albumen. Radicle inferior. 



Synopsis. 



TRIBE I. FRANGULE^E. Fruit superior, drupaceous, fleshy or baccate. 



# Putainen entire, 1 -3-celled. 



H- Petals none. 



1 . CONDALIA. Disk thick, rilling the base of the calyx. Albumen entire. 



2. REYNOSIA. Disk thin, lining the calyx-tube. Albumen ruminated. 



H -i- Petals 4-5. 

 3 BERCHEMIA. Petals 5, as long as the calyx. Woody vines. 



* * Putamen separating into 2-4 nutlets. 



4. SAGERETIA. Flowers in terminal spikes. Leaves opposite. 



5. RHAMNUS. Flowers in axillary clusters. Leaves alternate. 

 (',. CEANOTHUS. Flowers in thyrsoid panicles. Calyx white. 



7. COLUBRINA. Flowers in axillary clusters. Calyx green. Fruit dry. 



TRIBE II. GOTJANIE^E. Fruit inferior, dry, 3-winged. 



8. GOUANIA. A woody vine, climbing by tendrils. Flowers dioecious. 



1. CONDALIA, Cav. 



Calyx 4 - 5-cleft, adherent to the base of the ovary, the lobes deciduous. 

 Petals none. Stamens 4 or 5, alternate with the calyx lobes. Ovarv 2-3- 

 celled, with a single erect ovule iu each cell. Style short ; stigma 2 - 3-iobed. 



