Compositae 



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disk florets_^ay floret 



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Fig. 1. Compositae. a, sunflower, b, goldfield. c, portion of flower head, 

 d, details of disk floret, e, dandelion, f, thistle. 



Gramineae 



Fig 2. Gramineae. a, rye grass, b, flower stalk of oats, c, three spikelets 

 of rattlesnake grass, d, spikelet clusters of brome. e, grama grass, f, needle 

 grass, g, details of flower. 



Leguminosae 



Fig. 3. Leguminosae. a, typical flower, b, roots with bacterial nodules, 

 c, clover leaf, d, lupine leaf, e, vetch leaf, f, open vetch pod. g, pods of 

 mesquite. h, pods of locoweed. i, pod of lupine. 



