314 



LlLIACEAE 



Erythronium 



50 



Map 644 



Lilium canadense L. 



5 ~5o 



Map 645 



Lilium michiganense Farwell 



50 



Map 646 



Erythronium albidum Nutt. 



amount of moisture has a marked effect upon the number of flowers on the 

 plants. Where it is driest, most of the plants will have only one flower. 

 The distribution is probably nearly as follows: 

 Ont., Mich, to Minn., southw. to Ky. and Mo. 



5. Lilium tigrinum L. Tiger Lily. Nieuwland writes (Amer. Mid- 

 land Nat. 3: 106. 1913) that this species is an "escape to the woods at 

 Notre Dame, growing perfectly wild and maintaining itself and spreading." 

 I have paid little attention to plants of any kind that have escaped and this 

 species may be more frequent than I know. I have a specimen which I 

 found along a railroad about a mile south of Connersville, Fayette County. 



Nat. of China and Japan. 



1076. ERYTHRONIUM L. Trout Lily 



Flowers white or pinkish; stigmas mostly 2-3 mm long, curved outward. .1. E. albidum. 

 Flowers yellow ; stigmas usually shorter, erect 2. E. americanum. 



1. Erythronium albidum Nutt. White Trout Lily. Map 646. Infre- 

 quent to frequent in moist woods throughout the state, usually more 

 frequent and abundant in rich, alluvial flats along streams. This species 

 and the next one have been reported from all parts of the state. It has a 

 short flowering period, from the last of April to the first part of May, 

 which accounts for the few specimens I have collected. This species and 

 the next are usually called dogtooth violet in Indiana. 



Ont. to Minn., southw. to Ga. and La. 



2. Erythronium americanum Ker. Common Trout Lily. Map 647. 

 Infrequent to frequent throughout the state. Like the preceding species, 

 where it is found it usually forms dense colonies because of its mode of 

 reproduction. After the seed germinate, it usually takes four years' growth 

 to produce a flower. The seedling, from the beginning of the second year, 

 produces annual crops of runners and bulbs, each going deeper until the 

 necessary depth, size, and vigor are reached to produce a flower, in 



