xxxvi General Key to Families 



Plants with leaves. 



Leaves parallel-veined. 



(A) Flowers small, collected on a spadix. Aracese. 



(B) Flowers not collected on a spadix. 

 *Flowers regular; corolla lobes 6; stamens 6. 



(a) Leaves grass-like, mostly at the base. 

 Flowers white or greenish. Melanthacese. 

 Flowers pink. (Allium). . Liliacese. 



Flowers blue. (Sisyrinchium} . Iridacese. 

 (6) Leaves not grass-like, mostly on the stem. 

 Flowers white or pink. Convallariacese. 

 Flowers green. Melanthacese. 



Flowers yellow or orange. Liliacese. 



Flowers red or wine-color. (Kruhsea.) 



Convallariaceae. 



** Flowers irregular, frequently with broad or 

 inflated lip and spur. Orchidacese. 



Leaves not parallel-veined. 



(A) Flowers small, in close heads surrounded by 

 an involucre. 



Flowers all alike, florets ligulate. Cichoriacese. 

 Flowers not alike, central ones tubular, mar- 

 ginal usually with rays. Carduacese 



(B) Flowers in umbels at the ends of the stems 

 or branches. 



Umbels broad, flat or nearly so, flowers white, 

 yellow, or purple. Apiaceae. 



Umbels round. 



Flowers greenish; leaves compound. 



Araliaceae. 

 Flowers white or pink; leaves simple. 



(Eriogonum. ) Polygonacese. 



(C) Flowers not in umbels. 

 * Flowers regular. 



