xli 



145a. Plants of the composite type, with several or many small 

 flowerets closely aggregated into a dense head subtended by a 

 calyx-like involucre of small bracts 146. 



145b. Flowers solitary or in clusters, but not in involucred heads 



147. 



146a. Leaves compound with 3 leaflets; stipules present 



LEGUMINOSAE, p. 58. 

 146b. Stipules none COMPOSITAE, p. 113. 



147a. Leaves compound or deeply lobed 148. 

 147b. Leaves simple and not deeply lobed 154. 



148a. Flowers irregular LEGUMINOSAE, p. 58. 



148b. Flowers regular 149. 



149a. Petals 3 LIMNANTHACEAE, p. 68. 



149b. Petals 4 150. 



I49c. Petals 5 or more 151. 



150a. Stamens 4 70a, in ROSACEAE, p. 57. 



150b. Stamens 6 CRUCIFERAE, p. 42. 



150c. Stamens numerous 43, in RANUNCTJLACEAE, p. 39. 



151a. Flowers in heads or umbels 152. 



151b. Flowers in slender spikes or racemes 153. 



152a. Styles 2 UMBELLIFERAE, p. 80. 



152b. Styles 5 ARALIACEAE, p. 80. 



153a. Leaves ternately compound 43, in RANUNCULACEAE, p. 39. 

 153b. Leaves once-pinnately compound 50b, in ROSACEAE, p. 55. 



154a. Flowers irregular 155. 

 154b. Flowers regular 156. 



155a. Stamens 2 40b, in SCROPHULARIACEAE, p. 104. 



155b. Stamens 5 or 10 SAXIFRAGACEAE, p. 49. 



155c. Stamens 6 or "8 POLYGALACEAE, p. 65. 



156a. With sheathing stipules surrounding the stem at the base 

 of each leaf POLYG01VACEAE, p. 24. 



156b. Stipules not encircling the stem, or none 157. 



157a. Petals 3 CISTACEAE, p. 74. 



157b. Petals 4 158. 

 157c. Petals 5 16.1. 



158a. Stamens 2 159. 



158b. Stamens 6 CRUCIFERAE, p. 42. 



158c. Stamens 8 160. 



