202 FLORA OF TEXAS. 



A. HEPTAPHYLLA, Buckley. Leaves petiolate, palmate, 

 7-foliate ; leaflets small, ovate-lanceolate, sessile, or shortly 

 petiolate, apex mucronate-dentate, acuminate; panicles 

 cymose, long-pedunculate ; floicers small ; petals distinct, 

 oblong-lanceolate, sub-obtuse ; stamens exsert ; berries 

 round, 3-4 seeded. Flowers last of April and first of 

 May. Common on the mountains in Burnet and San 

 Saba Counties, climbing sometimes to the height of 25-30 

 feet. 



36. BUCKTHORN FAMILY. Order, Rhami^ace^. 



Woody plants, or small trees, often spiny. Leaves sim- 

 ple, alternate ; regular floicers (sometimes apetalous or 

 otherwise imperfect); petals 4 or 5, small; stamens same 

 number as the petals, opposite them and alternate with 

 the sepals. Stamens and petals both perigynous (inserted 

 on the calyx), or on a fleshy cup which lines the tube 

 of the calyx; calyo: valyate (edge to edge) in the bud; 

 dish fleshy. Fruit of 2 to 5 cells, and one large seed in 

 each. 



SYNOPSIS. 



■■' Dintpe baccate, 1-%-celled. Ovary immersed on the disk. Petals 5. Drupe 



2-celled. Calyx free Berchxmia. 



** Leaves alternate. Seeds farrowed on the back. Flowers clustered. 



Leaves alternate. Seeds not furrowed on the back. Flowers clustered. 



Fkaxgttla. 



*** Flowers corymbed. Calyx white. Nutlets 2-valved Ceanothcs. 



Flowers cymose. Calyx green. Nutlets opening at the margin. . . Coltjbbika. 



BERCHEMIA. 



Calyx 5-cleft, the tube hemispherical ; petals 5, sessile, 

 as long as the calyx; ovary free, 2-celled, half immersed 

 in the fleshy disk ; styles united ; stigmas 2 ; drupe 

 oblong, 2-celled, 2-seeded. — Erect or twining sliruhs, with 



