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THIRTEENTH REPORT. 
(g) Helvellaceae. 
1. Cap continuous with stem; both hollow within: (2) 
1. Cap loose around the stem, of variable shapes (3) 
2. Large; cap 2-5 in. across with labvrinthiform folds, forming hy- 
menial surface: Gyromitra. 
2. Smaller; folds up and down and crosswise, forming irregular rows of 
pits. Morchella. 
3. Cap composed of flaps hanging about the stem : Helvetia. 
3. Cap bell-sliaped. Verpa. 
(h) Geoglossaceae. 
1. Apothecia with differentiated cap: (2) 
1. Apothecia clavate, compressed: (3) 
2. Gelatinous, green or yellowish; spores ellipt. — fusiform: Leotia. 
2. Fleshy-leathery; spores filiform; cap yellowish to brownish: 
Cudonia. 
3. Plants bright-colored: (4) 
3. Plants black or blackish; spores 4-manv-celled, brown or blackish: 
(6) 
4. Apothecia spatulate to fan-shaped: Spathularia. 
4. Apothecia clavate: (5) 
5. Spores 1-celled: Mitrula. 
5. Spores 4-many-celled. Microglossum. 
6. Gelatinous: Gloeoglosswm. 
6. Xot Gelatinous, without spines : Geoglossum. 
C>. Hymenium beset with spines: Tviclioglossum. 
(i) Ascol)olaceae. 
1. Spores hyaline (2) 
1. Spores at length violet or brown: (3) 
2. Apothecia hairy: Lasiobolus. 
2. Apothecia smooth: Ascoplianous. 
3. Spores in a gelatinous envelope : Saccobolus. 
3. Spores not in such envelope. > Ascobolus. 
(k) Pezizaceae. 
1. Cup externally hairy: Lachnea. 
1. Cup smooth on outside: (2) 
