72 UIIAM.VACK/E. (mLCKTIIOKN FAMILY.) 



1- A. quinqnefolia, Midix. (Virginian Cukei-kr.j — l.ow <rioun{l8, 

 Floriilii ami nortliwnrd. June. — Stem rlimhmi,' by lafenil t"ii(lrils. lA-aflcts 

 5, oblong-obovutc, senate above tlic middle, sniootli. licsry small, dark-blue. 



Order 39. RIIA3Ii\ACE^. (Buckthorn Family.) 



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

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

 A-ate 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, Avith a solitary erect anatropous ovule in each cell. Style 

 single. Fruit drupacj'ous. Embryo large, in the axis of scanty fleshy 

 albumen. Radicle inferior. 



fynopsis. 



* Drupe hacoate, 1 - 2-celled. Ovary immeriscd in the disk. 



1. SCUTIA. Petals 5, or iiouc. Drupe 1-celled. ("alv.x adnate to the base of the ovary. 



2. BKRCHEMIA. Petals 5. Drupe 2-eelled. Calyx free. 



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



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



4. R1IAVNU.S. Leaves alternate. Seed furrowed on the back. Flowers clustered. 



5. FRANGUL.\. Leaves alternate. Seed not furrowed. Flowers uuibelled. 



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



6. CEANOTIIUS. Flowers corymbed. Calyx white. Nutlets 2-valved. 



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



8. GOUANIA. Flowers spiked. Woody vines. 



SCUTIA, Commers. 



Calyx-tube hcmi.«pherlcal or pitcher-shaped, with .'5 acute lobes. Petals .5, in- 

 serted into the nuugin 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-Iobed. Fruit 1-celled, or separating into 

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

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

 flowers in simple umbels. 



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

 alternate, elliptical or obovate, cmarginate, obtuse at the base, short-petioled ; 

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

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

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

 erect ; drupe 1-celled, 1-secded. (Hhamnus ferreus, Valil. Zizyphus emargina- 

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

 1 'lone:. 



