KEY TO FAMILIES 



. e. w ithin the other parts 

 e. below the other parts 



(n) Plants not fleshy : stamens many 



r. Stamens and petals coming o!T with the calyx 

 s. Stamens and pistils entirely free from the calyx 

 n. Pistil 1 



(ni) Pistil with a single stigma 



(n) Pistil with 2 or more stigmas, or the ovary lobed 

 r. Stamens 5-10 



(r) Ovary 4-5-celled or 10-celled 

 h. Leaves simple, entire 



I eaves lobed to compound 

 (h) Leaves of 3 leaflets 

 (i) Leaves not of 3 leaflets 

 p. Flowers yellowish 

 q. Flowers never yellow 

 (s) Ovary l-2-celled 

 h. ( (vary 2-celled 

 (h) Ovary superior, 

 (i) Ovary inferior, 

 i. Ovary 1-celled 



(h) Styles 2, the ovary lobed at tip 

 (i) Styles 3-5, when 2 the ovary not lobed 

 s. Stamens many 



(r) Stamens united into a column 

 (s) Stamens not united into a column 

 (y) Flowers irregular 

 m. Flowers spurred 



(m) Spur formed by a petal 

 (n) Spur formed by a sepal 

 n. Flo spurred 



(m) Stamens 6-8; ovary 2-celled 

 (n) Stamens 10; ovary 1-celled 

 y. Petals apparently 6 



Stamens 5; flower very irregular, one sepal spurred 

 (y) Stamens 6, pistil 1; petals really 3 

 (z) Stamens and pistils many; petals really sepais 

 z. Petals many: double flowers of many families, to be determined 

 by the beginner only when single 

 (2) Petals united 



(a) Ovary superior, i. e., within the other parts 

 x. ('vary l-celled, or pistils 5, separate 

 (x) Ovary 1-celled 

 m. Corolla regular 

 (m) Stigma 1 



r. Stamens opposite the corolla lobes 

 s. Stamens alternate with the corolla lobes 

 (n) Stigmas 5 

 n. Corolla irregular 



(m) Calyx teeth with hooked bristles 

 (n) Calyx not bristly 

 (y) Pistils 5, separate 

 y. Ovary 2-4-celled, rarely the 2 cells separate or 4-lobed 

 (x) Ovary 2-celled, or 2 ovaries united by the stigmas 

 m. Corolla papery, tiny, 4-lobed 

 n. Corolla not papery and tiny, rarely 4-lobed 



(m) Flowers regular; stamens as many as the corolla lobes 

 r. Ovarv 2-celled 



