A KEY TO THE FAMILIES. 



BASED UPON LEAF CHARACTERS, WITH FLOWER CHARACTERS 

 SUBORDINATED 



PAGE 



A. Leaves alternate, toothed. 



Flowers; 5 petals or corolla divisions, 



5 sepals or calyx divisions, 

 5 stamens. 



Shrubby twining vine. Celastracece 254 



Tiny flowers in spikes, 



Leaves compound, in Panax circled. Araliacea 302 



Tiny flowers flat-clustered, 2 styles, 



Leaves deeply cut compound 



Stems hollow. Umbelliferce 306 



Lobed corolla, I stigma, 



Leaves cut-edged (between teeth and' lobes), 



Foliage rank scented. Solanacece 410 



Bell-shaped corolla, 



Leaves also toothless, linear. Campanulacece 456 



Tubular corolla long-lobed, stamens united in tube, 



Milky acrid sap. Lobeliacece 462 



Flowers; 5 petals or corolla divisions, 



5 sepals or calyx divisions, 

 3 or many stamens. 



Leaves with stipules, mostly compound, 



Many simple. Rosacea 188 



Leaves generally palmate. Malvacece 266 



3 stamens only, 



Leaves lobed; vines with tendrils. Cucurbitacea 454 



Flowers; 4 or more petals, etc.; or no petals. 



4-15 petals or none, 5-6 white sepals, many stamens, 



Leaves mostly lobed or compound. Ranunciilacece 128 



4-12 petals, genl. 2 sepals, many stamens, 



Leaves lobed or dissected, 



Milky or yellow sap. Papaveracece 156 



4 petals united, 2 sepals, 6 stamens, 



Leaves dissected compound; vine. Fumariacece 158 



4 petals & sepals, 6 stamens (2 long, 4 short), 



Leaves generally lobed. Crucifera 166 



4-5 petals etc.; shrubs. Rhamnacecz 258 



4-5 petals, etc., 



Leaves lobed; vines with tendrils. Vitacece 260 



Flowers; 3 or many petals or none, or rayed. 



Tiny green flowers, no petals, 



2-5 calyx lobes & stamens. Chenopodiacece HO 



Small dull-colored flowers, 



3-20 petals & pistils, many stamens, 



56 7 



