CRASSULACEAE. 81 



Family CRASSULACEAE. Stonecrop Family. 

 A rather small family of succulent herbs, some in rockeries. 



SEDUM. Stonecrop. 



Perennial herbs with simple fleshy leaves alternate or crowded 

 in whorls ; no stipules ; small usually perfect polypetalous 

 flowers ; and several small follicles from each flower. 



1. Leaves scarcely broader than thick. 2. 

 Leaves distinctly flattened. 3. 



2. Leaves short, overlapping : flowers yellow. S. acre. 

 Leaves elongated, spaced. S. pulchellum. 



3. Leaves at least partly in whorls of three. 4. 

 Leaves not whorled. 5. 



4. Leaves entire, some in rosettes. S. ternatum. 

 Leaves crenate, not in rosettes. S. Sieboldii. 



5. Low : some leaves in rosettes : flowers white. S. Nevii. 

 Erect : without rosettes : flowers purplish. S. purpureum. 



Family SAXIFRAGACEAE. Saxifrage Family. 

 A moderate-sized family including many perennial herbs used 

 in gardening; the source of gooseberries and garden "currants" 

 (real currants being the small seedless Corinthian grapes often 

 used in pastry) ;"and comprising several of the most showy shrubs 

 employed in landscape work. 



PHILADELPHIA. "Syringa." Mock Orange. 

 Deciduous shrubs with often exfoliating brown bark ; white 

 firm wood with minute diffused ducts and fine medullary rays; 

 moderate or slender more or less 6-sided twigs ; rounded or 6- 

 sided continuous pith; opposite (exceptionally in whorls of 3) 

 raised membranous leaf-scars usually concealing the buds, with 3 

 prominent bundle-traces ; ovoid sessile buds with few evident 

 scales ; lanceolate or ovate petioled mostly remotely denticulate or 

 toothed simple leaves ; rather large perfect polypetalous white or 

 creamy stalked flowers, a few from each upper axil or sub- 

 panicled; and few-seeded small turbinate inferior capsules long 

 surmounted by the calyx segments. 



