KEYS TO THE GENERA 41 



B. Flowers short with a 5-lobed spreading border, in large clus- 

 ters. iSambiicus (p. 220). 

 D. Regular with corolla of 5 separate petals ; fruit bladder-like. 

 Staphylfea (p. 105). 



* Flowers inconspicuous by small size or lack of color. Acer (p. 103). 



Key 5. Leaves alternate, simple with entire edges, 

 (For small-leaved plants, leaves under 1 inch long, use Key 0, p. 51). 

 Key based on leaves. For a key based more on flowers, see the next, 

 5 a. 



* Spiny or thorny plants. (A.) 



A. Leaves with silvery scales on one or both sides. Elseagnus 



(p. 300). Hippophae (p. 303). 

 A. Leaves without silvery scales. (B.) 



B. Fruit 1 to few-seeded berries. Berberis-(p. 64). Lyciura 



(p. 284). 

 B. Fruit 1-seeded cherry-like drupes. Bumelia (p. 2(39). 

 B. Fruit (when found) large, orange-like in form and size ; plant 



milky-juiced. Madura (Toxylon) (p. 310). 

 B. Fruit elongated pea-like pods. Acacia (p. 132). tllex (p. 113). 



* Plants not spiny. (C. ) 



C. Leaves heart-shaped. 1, fully shrubby, Cercis (p. 125). 2, herba- 

 ceous, Polygonum (p. 209). 

 C. Leaves narrow, one fourth as wide as long. (D.) 



D. Flowers over an inch long of 5 bright yellow petals. Helian- 



themum (p. 09). 

 D. Flowers with a long tube and 4-lobed spreading border. 



Daphne (p. 298). 

 D. Flowers small ; fruit a 1-seeded berry ; leaves silvery below. 



EUeagnus (p. 300). 

 D. Flowers small, globular, 5-lobed, in June. Andr6medapolif61ia 



(p. 253). 

 D. Flowers usually in globular clusters, apparently of yellow 

 stamens only. Acticia (p. 132). 



D. Flowers with long red stamens, sessile in a leafy-tipped cluster. 

 Callist^mon (p. 207). 



C. Leaves larger and wider, decidely aromatic or pleasantly 

 scented. (E.) 



E. Leaves thick and about evergreen. P6rsea (p. 294). INIyrica 

 (p. 311). Skfmmia (p. 84). Callist^mon (p. 207). 



E. Leaves thinner and deciduous. Benzoin (p. 297). Sassafras 

 (p. 296). 

 C- Leaves thick, evergreen or nearly so, not especially aromatic. (F. ) 



