TENTH REPORT. 
72 
America. Mutinus is recognizable by its horn shape ancl the apex not 
enlarged. The color is deep pink to red. I have seen only two collections 
from Mich. 
Mutinus Ravenelii Berk, is more club-shaped. Not reported. 
Mutinus caninus (Huds.) Fr. probably does not occur within our 
limits. 
Dictyophora. 
This genus includes the common large stink-horns with a differentiated, 
somewhat ovate apex or cap. In some species there is a large lace-like veil 
depending from the cap; others have merely a rudiment of a veil. At the 
base of the stem is a large cup-shaped volva. The odor becomes putrid at 
maturity of spores. We have apparently only two species. 
1. Dictyophora duplicate (Bose.) E, Fischer. (In sense of Burt and Atk.) 
Other names: 
Dictyophora phalloidea Desv. (In Engler and Prantl.) 
Hymenophyllus indusiatus Yen. 
Phallus duplicatus Bose. (In Alorgan and Lloyd.) 
This species has large reticulations on the cap and a large pendant veil 
when fresh. Probably found throughout the state. It grows singly or in 
small numbers on the ground in woods or clearings. It is 15-20 cm. high 
and about 5 cm. in chain, at apex. Common at Ann Arbor. 
2. Dictyophora Ravenelii (B. and C.) Burt. (In sense of Burt and Atk.) 
Other names: 
Ithyphallus Ravenelii (B and C.) E. Fischer. (In Engler and Prantl.) 
Phallus Ravenelii, B. and C. (In Morgan and Lloyd.) 
Phallus impuclicus (L.) Fr. (In various reports.) 
This species has hardly any veil; sometimes it is taken to be absent and 
the species is then referred to Phallus impudicus. Pileus is not reticulate. 
Found on old logs, sawdust, or around rotting wood, usually in the woods. 
It has not been reported from the northern part of the state. 
Phallus impudicus (L.) Fr. is not certainly found in this country accor- 
ding to Lloyd, although Peck, Schweinitz, etc., have so reported it. The 
veil is entirely absent. 
II. 
i 
Hymenogastr incites. (The underground puff-balls.) 
The fruit-body is mostly subterranean, sometimes above ground. Cap- 
illitium is lacking. The spores are borne on a hymenium which lines the 
interior of variously-shaped chambers, and, with the gleba (which corre- 
sponds to the trama of Agaricus), persists till the fruit-body falls apart or 
deliquesces. There are three families. 
Secotiaceae. 
1. Secotium acuminatum Mont. (In sense of Engler and Prantl, Lloyd 
and Setchell.) 
Other names: 
Secotium Warnei Pk. (In Peck.) 
Secotium Agaricoides (Czern.) Holl. 
Secotium Thunii. Schulzer. 
Lycoperdon Warnei Pk. and Podaxon Warnei Pk. 
Above ground. A columella of sterile tissue extends like an axis from 
