280 American Midland Naturalist Monograph No. 7 

 2 1 . Sepals and petals united nearly to apex 



.21. Convallaria 

 20. Flowers lavender or blue; plants with bulbs. 



22. Sepals and petals nearly distinct throughout 



13. Camassia 



22. Sepals and petals united nearly to apex 



14. Muscari 



18. Flowers in a corymb or umbel; plants with bulbs. 



23. Flowers in a corymb, greenish-white; filaments flattened at 



the base; midvein of leaves whitish 15. Ornithogalum 



23. Flowers in an umbel. 



24. Plants with the odor and taste of onions (alliaceous) ; 

 flowers pink or white, often replaced by bulblets; seeds 



1 or 2 in each locule of the capsule 7. Allium 



24. Plants not alliaceous; flowers yellowish; seeds several in 



each locule 8. Nothoscordum 



1. Stenanthium (A. Gray) Kunth 



S. gramineurn (Ker) Morong. Woods, and moist ground along 

 creeks, rare; s. III., extending northward to Richland, Macoupin, 

 Fayette, and Pike counties. June-Aug. 



2. Zigadenus Michx. — Death Camas 



Z. glaucus Nutt. Limestone bluffs and crevices of rocks, rare; 

 known from Jo Daviess and Kane counties. July-Aug. 



3. Tofieldia Huds. — Asphodel 



T. glutinosa (Michx.) Pers. Bogs in Cook, Lake, and McHenry 

 counties. June-July. 



4. Chamaelirium Willd. 

 C. luteum (L.) A.Gray. Woods, rare; Hardin and Massac counties. 



5. Melanthium L. — Bunchflower 



M. virginicurn L. Meadows, in the w. and centr. part of the state, 

 rare. June-July. 



6. Veratrum L. 



V. woodii Robbins. Moist wooded ravines, rare; known from eight 

 counties chiefly in the central part of 111. July-Sept. 



7. Allium L. — Onion 



1 . Leaves linear, terete or flat, present at flowering time. 



2. Umbel nodding, 2-bracted, not bulblet-bearing; perianth rose, 

 4-6 mm long; ovary and capsule crested; stamens exserted; 

 outer bulb-coat membranous; banks, n. 111. July-Sept. Nod- 

 ding Onion A. cernuum Roth 



2. Umbel erect. 



3. Umbels commonly bulblet-bearing. 



