72 RHAMNACE-E. (BUCKTHORN FAMILY.) 



!• A. quinciuefolia, Michx. (Vieginian Ckbeper.; — Low grounds, 

 Florida and northward. June. — Stem climbms; by lateral tendrils. Leaflets 

 5, oblong'ohovate, serrate above the middle, smooth. Berry small, dark-blue. 



Order 39. RHAMJVACEiE. (Buckthorn Family.) 



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

 perigynous greenish or whitish flowers. — Sepals 4 - .5, united below, val- 

 vate in the bud. Petals alternate with the sepals, concave or hooded, 

 sometimes wanting. Stamens opposite the petals, and inserted with them 

 into the margin of a fleshy disk, which lines the base of the calyx. Ovary 

 1-4-celled, with a solitary erect anatropous ovule in each cell. Style 

 single. Fruit drupaceous. Embryo large, in the axis of scanty fleshy 

 albumen. Radicle inferior. 



fynopsis. 



* Drupe baccate, 1 - 2-celled. Ovary immersed in tlie dislc. 



1. SCUTTA. Petals 5, or none. Drupe 1-celled. Calyx adnate to the base of tlie ovary. 



2. BBRCHBMIA. Petals 6. Drupe 2-celled. Calyx free. 



* * Drupe baccate, separating into 2-4 nutlets. 



3. SAGERETIA. Leaves opposite. Nutlets 3. Flowers spiked. ' 



4. RHAMNUS. Leaves alternate. Seed furrowed on the back, ilowers clustered. 

 6. FKANGULA. Leaves alternate. Seed not furrowed. Flowers umbelled. 



* * * Drupe at length dry, separating into 3 nutlets. 



6. CEANOTHUS. Flowers coryuibed. Calyx white. Nutlets 2-valved. 



7. COLUBRINA. Flowers cymose. Calyx green. Nutlets opening at the inner angle. 



8. OOUANIA. Flowers spiked. Woody vines. 



SCUTIA, Commers. 



Calyx-tnbe hemispherical or pitcher-shaped, with .5 acute lobes. Petals .5, in- 

 serted into the margin of the disk, short-clawed, sometimes wanting. Ovary 

 adhering to the disk below, 2 - 3-celled, with a single erect ovule in each cell. 

 Style single, conical. Stigma 2 - 3-lobed. Fruit 1-celled, or separating into 

 2-3 one-seeded nutlets. Seeds without albumen. Badicle very short. — Shrubs, 

 with alternate or opposite coriaceous entire 2-stipulate leaves, and small axillary 

 flowers in simple umbels. 



1 . S. ferrea, Brongn. Spineless ; mature leaves coriaceous, opposite or 

 alternate, elliptical or obovate, emarginate, obtuse at the base, short-pctioled ; 

 stipules by pairs, ovate, minute ; flowers clustered, axillary, on short pedicels ; 

 calyx-tube 5-angled, the lobes ovate ; ovary immersed in the thick 5-lobed disk, 

 2-celled, with an ascending ovule in each cell ; style very short ; stigmas 2, thick, 

 erect; drupe 1-celled, l-seeded. (Rbamnus ferrens, Vahl. Zizyphus emargina- 

 lus, Swartz) — South Florida. — Branches opposite, whitish. Leaves pale, 

 1 'long. 



