Helotium 113 



spores 1- or 2-seriate, smooth, ovoid, or ellipsoid, 4 X 8~10 /x. 

 usually with two small oil-drops; paraphyses filiform. 



On living Marchantia polymorpha. 



Type locality: Europe. 



Distribution: New York and Michigan; also in Europe. 



Our only knowledge of this species is Durand's report in 

 Bull. Torrey Club 29: 463. 1902, and a report of its occurrence 

 in Michigan by Dr. B. Kanouse. 



Doubtful and Excluded Species 



Cyathicnla alpina Ellis & Ev. Proc. Acad. Sci. Phila. 1894: 349. 1894. 

 Apothecia minute, about .5 mm. in diameter and less than 1 mm. high; pallid, 

 the margin fibrous, the extremities of the fibers prolonged and subfasciculate 

 so as to make the margin obscurely dentate; asci clavate-cylindric, 8-spored; 

 spores subcylindric, 1.5-2 X 8-10 m; paraphyses filiform. On dead stems of 

 Pedicularis and culms of Elymiis condensatus, Colorado, alt. 9500 ft. It is 

 doubtful if this species belongs here. 



Cyathicula aquilina (Rehm) Sacc. Syll. Fung. 8: 307. 1889; Coronellaria 

 Aquilinae Rehm, Hedwigia 24: 231. 1885. This species has been reported 

 from Washington by Dr. B. Kanouse on fern debris and on Gaultheria 

 Shallon. Rehm makes this a synonym of Mollisia pteridina Karst. 



Cyathicula dentata (Pers.) Sacc. Syll. Fung. 8: 307. 1889; Peziza dentata 

 Pers. Ic. Descr. Fung. 5. pi. 1, f. 6, 7. 1798; Niptera dentata Fuckel, Symb. 

 Myc. Nacht. 1: 47. 1871; Cistella dentata Quel. Ench. Fung. 319. 1886; 

 Mollisia dentata Gill. Champ. Fr. Discom. 124. 1882; Calloria dentata Phill. 

 Brit. Discom. 332. 1887. This species has been reported from Michigan 

 under the name Cistella dentata. It is also reported from Washington under 

 the name Pezizellaster radiostriatus (Feltig) Hohn. Von Hohnel regarded these 

 as identical. 



Pezoloma grisenm Clements, Gen. Fungi 175. 1909; Minn. Bot. Stud. 4: 

 186, pi. 25, f. 2. 1911. The illustration shows the apothecium beset with a 

 border of very long, tooth-like structures consisting of a fascicle of mycelial 

 threads. The spores are described as 3-4 X 15-18 /x- The species should be 

 further investigated. It is known only from the type collection in Colorado. 



Lachnaster miniatus Kanouse, Mycologia 39: 662. 1947. Described as 

 having long, whiplash hairs arranged in teeth, pale-yellow; spores 1-1.5 X 

 6-8 m; paraphyses lanceolate. The toothed margin would place this in the 

 genus Cyathicula. On Pteridium aquilinum, W^ashington. 



24. HELOTIUM Fries, Summa Veg. Scand. 354. 1849. 



P seudohelotium Fuckel, Symb. Myc. 298. 1869. 

 Pkialea (Fries) Boud. Bull. Soc. Myc. Fr. 1: 112. 1885. 

 Discinella Boud. Hist. Class. Discom. Eu. 96. 1907. 

 ? P seudociboria Kanouse, Mycologia 36: 460. 1941. 



Apothecia long-stipitate to sessile or subsessile, externally 

 smooth (not hairy), usually small (not exceeding 2-3 mm. in 



