13 



31a. Stem bearing 2 whorls of 39 leaves (3 6 dm. high; flowers 

 pale yellow, early summer) 



Indian Cucumber-root, Medeola virginiana. 



31b. Stem-leaves not whorled, or all leaves basal 32. 



32a. Flowers in umbels 33. 



32b. Flowers in racemes or panicles 38. 



33a. Plant with the odor of onions or garlic (leaves all or chiefly 

 basal; flower-stalks 2 8 dm. high, late spring or summer) 

 34. 



33b. Plant not with the odor of onions (leaves basal; flower-stalks 

 2 3 dm. high, with an umbel of 3 6 greenish-yellow flowers in 

 late spring) Clintonia, Clintonia borealis. 



34a. Leaves oblong, 2 5 cm. wide, not present when the plants 

 are in bloom (greenish-white flowers) 



Wild Leek, Allium tricoccum. 

 34b. Leaves linear, present with the flowers 35. 



35a. Umbel nodding or horizontal (petals rose-color) 



Wild Onion, Allium cernuum. 



35b. Umbel erect 36. 



36a. Pedicels longer than the flowers 37. 



36b. Pedicels equaling or shorter than the flowers (petals rose- 

 purple) Wild Chives, Allium schoenoprasum Tar. sibiricum. 



37a. Leaves flattened; flowers pink to white 



Wild Onion, Allium canadense. 

 37b. Leaves cylindrical; flowers greenish to purple 



Field Garlic, Allium vineale. 



38a. Leaves lanceolate to ovate, not more than 8 times as long 



as broad 39. 

 38b. Leaves linear or grass-like, at least 12 times as long as 



broad 45. 



39a. Principal leaves all basal, stem-leaves none or bract-like 40. 

 39b. Principal leaves on the 'stem 



40a. Flowers in a spike-like raceme (4 10 dm. high; small 

 white flowers in summer) Colic-root, Aletris farinosa. 



40b. Flowers in an umbel-like cluster 34b. 



41a. Perianth-segments 4 (1 2 dm. high; flowers white, early sum- 

 mer) Wild Lily of the Valley, Maianthemum canadense. 



41b. Perianth-segments 6 42. 



42a. Styles '3; flowers dioecious (3 10dm. high; flowers white, 

 early summer) Blazing Star, Chamaelirium luteum. 



42b. Style 1; flowers perfect, white, in spring (False Solomon's 

 Seal) 43. 



