KEYS TO THE GEXERA 51 



H. Flowers large, 2 inches or more, of 5 petals and many stamens 



(often double). R6sa (p. 166). 

 H. Flowers smaller, white ; fruit blackberry- or raspberry-like; 



Rtibus (p. 164). 

 H. Flowers pea-shaped ; fruit pear-like pods. Robfnia (p. 119). 

 H. Flowers yellow in early spring. Mahbnia (p. 66). 

 H. Flowers Inconspicuous; fruit rounded, pepper-like. Zanthdxy- 

 ■lum (p. 83). 

 G. Plants without thorns or prickles. (I.) 

 I. Blades of the leaves entire at edges. (J.) 

 J. Fruit inflated or swollen pods 2 inches or more long. Coltitea 



(p. 123). 

 J. Fruit usually long pods Wt not inflated. Eobfnia (p. 119). 



Indigbfera (p. 119). Sophbra (p. 111). 

 J. Fruit jointed pods. Coronflla (p. 125). Sophbra (p. HI). 

 J. Fruit short pods in spike-like clusters. Am(5rpha (p. 117). 

 J. Fruit seed-like in calyx. Potentflla (p. 164). 

 J. Fruit berry-like, 2-oelled, 2-seeded ; flowers yellow, jasnii- 



num (p. 273). 

 J. Fruit dry and somewhat berry-like. Rhus (p. 107). 

 I. Blades irregularly and deeply cut. (K.) 

 K. Flowers very large, 3-8 inches. Psebnia (p. 57). 

 K. Flowers small. Zanthorhiza (p. 58). Rhils (p. 107). 

 I. Blades regularly twice-serrate. Sorb^ria (p. 159). 

 I. Blades regularly once-serrate. Rhiis (p. 107). T^ooma (p. 285). 

 Xanthocferas (p. 101). 



* Leaves 2-3 times pinnate. (L.) 



L. Leaves very large, 2-4 feet long. (M.) 

 M. Plant usually very prickly. Arklia (p. 211) . 

 M. Plant without prickles. Rhiis (p. 107). 

 L. Leaves smaller, twioe-abruptly-pinnate. Alblzzia (p. 131). 



Ackcia (p. 132). Csesalpfnia (p. 129). 

 L. Leaves odd-pinnate, finely divided, fern-like. GrevUlea (p. 306). 

 Sorb^ria (p. 159). Ehiis (107). 



* Leaves divided into threes 2 or 3 times with 9-27 blades. (N.) 



N. Blades notched ; plants hardly woody. Asti'lbe (p. 160). Ariin- 



cus (p. 161). 

 N. Blades entire. Woody evergreen plant of the extreme South. 



Nandina (p. 67). 



Key 9. Leaves small, generally | inch or less long, all leaves under 

 an inch loYig (except on the last, below, which is a shrubby pine with 

 leaves needle-shaped and sometimes over 2 inches long) . 



