1912] The Ottawa Naturalist. 163 



where every foot of the surface of the logs bore scores and even 

 hundreds of aethalia. On account of the comparatively large 

 size of the fruiting bodies and the various bright shades of pink 

 and red which they pass through before attaining maturity, this 

 is one of the species most commonly noticed by the casual 

 observer, by whom it is generally regarded as some kind of 

 puff-ball ; a pardonable error when it is recalled that the earliest 

 description was published under the name Lycoperdon epidendron. 



Arcyria nutans (Bull.) Grev. Exp. Farm. 



Arcyria incarnata Pers. Ottawa (M). 



Arcyria punicea Pers. ^4. den ud 'at a (L) Sheld. By far the 

 commonest species of the genus last season, being met with in 

 abundance almost everywhere in the neighbourhood of the Exp. 

 Farm in the earlier part of the summer, becoming much scarcer 

 as the season advanced. Also collected at Beaver Meadow 

 and King's Mt. 



Arcyria cinerea (Bull.) Pers. Exp. Farm. 



Hemitrichia serpula (Scop.) Rost. Near Hull (M). 



Hemitrichia ovata (Pers.) Macbr. A small quantity of 

 material of this diminutive species was gathered from the Boom 

 Rd., Chelsea. Macbride describes it as rare and records it only 

 from the States of Maine, Mass.; N. Y., and Ohio. 



Hemitrichia vesparum (Batsch) Macbr. Hermiarcyria rub-- 

 iformis (Pers.) Rost. Exp. Farm. This was the last species- 

 collected, material still in fairlv good condition being gathered- 

 on Oct. 28th. 



Hemitrich ia intorta List . This was found abundantly around ' 

 the Exp. Farm during the earlier part of the season and was also 

 gathered at Beaver Meadow and King's Mt. Macbride de- 

 scribes it as rare and lists it only from " Fairmount Park, Phila- 

 delphia; Ohio; Iowa." It was certainly the commonest species 

 of the genus here, last season. 



Hemitrichia clavata (Pers.) Rost. Carleton Place (M) ; Boom 

 Rd., Chelsea; King's Mt. 



Trichia inconspicua Rost. Exp. Farm. 



Trichia varia (Pers.) Rost. Ottawa (M). 



Trichia scabra Rost. Ottawa (M), Moore Creek (M), King's 

 Mt. 



Trichia jallax Pers. T. decipiens (Pers.) Macbr. Quite, 

 abundant in places on the Boom Road, Chelsea. 



Trichia persimilis Karst. King's Mt. 



