140 



MINNESOTA MUSHROOMS 



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Figure 105. Verpa coxica 



Key to the Species 



1. Stem ribbed or grooved 



a. Stem slender, gray to black; cap little wrinkled, dark 



H. lacunosa 



b. Stem stout, white or whitish ; cap much wrinkled, white 



H. crispa 



2. Stem smooth, elastic H. clastica 



Helvella lacunosa Dark Helvella 



Cap 2-4 cm. wide. 1-3 cm. tall, dark gray to blackish or 

 almost black, with a few wrinkles at the center, saddle-shaped. 

 3-4-lobed; stem 3-6 cm. by 7-15 mm., gray to black, promi- 

 nently ribbed and grooved lengthwise, hollow ; spores clear, 

 elliptic, smooth, 16-18 X 9-12/t. The name refers to the 

 grooved stem. 



On the ground in woods ; edible. 



Figure 106. 

 Verpa digitaliformis 



Helvella crispa White Helvella 



Cap 3-6 cm. wide, 2-4 cm. tall, white or whitish, much 

 wrinkled, especially toward the middle, margin more or less 

 torn, irregular, hardly saddle-shaped ; stem 6-8 cm. by 2-3 

 cm., white or whitish, to grayish, deeply ribbed and hollowed, 

 hollow; spores clear, elliptic, smooth, 10-16 X 8-10/x. The 

 name refers to the curled cap. 



On the ground in woods ; edible. 



