Seaverinia 59 



known. Hone}- believes that this is a good species even though the connection 

 with a perfect has not actually been proven. 



In addition to the species listed above, two others were listed by Edwin E. 

 Honey (Am. Jour. Bot. 23: 105. 1936) as follows: Monilinm emarginata on 

 Prunus emarginata and Monilinia Aroniae on Aronia spp. So far as we are 

 aware these are still unpublished and must remain in doubt. 



Monilinia Uniula (Weinm.) Whetzel, Mycologia 37: 673. 1945; Peziza 

 Urnula Weinm. Flora 15: 455. 1832; Peziza (Phialea) Unmla Weinm. 

 Hymeno-Gastero-Mycetes 459. 1836; Sclerotinia Vaccinii Woron. Mem. 

 Acad. Sci. St. Petersb. 36: 3. 1888. This species has been reported from 

 Washington by Dr. B. Kanouse on Vaccininm sp. There seemed to have been 

 some doubt in Whetzel's mind as to the identity of Phialea Urnula Weinm. 

 and Sclerotinia Vaccinii Woron. 



2. SEAVERINIA Whetzel, Mycologia 37: 703. 1945. 



Stroma substratal, poorly developed, perhaps vestigial, not 

 a definite sclerotium, formed in the rhizomes of the host and 

 visible on its surface usually as a narrow, black line; spermatia 

 not observed; conidial stage a Botrytis; conidiophores botryose 

 1 mm. or more in length, pale-brown, sparingly septate, formed 

 in tufts on the rhizome and roots of the host and, under moist 

 conditions, profusely developed, bearing conidia in rather dense 

 clusters, conidia pale-brown, minutely, but definitely tubercu- 

 late, subglobose, tapering somewhat to the point of attachment. 



Apothecia arising from the partially decayed rhizome, 

 stipitate, the length of the stem varying considerably depending 

 on the depth to which the rhizome is buried, shallow cup-shaped, 

 reaching a diameter of 15 mm.; asci c^-lindric or subcylindric, 8- 

 spored; spores ellipsoid, hyaline. 



Type species, Sclerotinia Geranii Seaver & Home. 



1. Seaverinia Geranii (Seaver & Home) Whetzel, Mycologia 37: 

 705. 1945. (Plate 85.) 



Sclerotinia Geranii .Seaver & Home, Mem. Torre\- Club 17: 205. 1918. 

 Stromatinia Geranii Seaver & Home, Mem. Torrey Club 17: 206. 1918. 



Conidial stage {Botrytis) occurring on the roots and rootlets 

 of the host, being especially abundant when left in moist chamber 

 for a few days and even developing on the outside of the apo- 

 thecia, usually appearing in tufts and often springing from 

 minute, sclerotium-like bodies, although the latter are not al- 

 ways present, dark-brown in mass at maturity; conidiophores 

 reaching a length of 1 mm. or more and a diameter of 10-15 m, 

 pale-brown, sparingly septate and branched, the conidia borne 

 in rather large masses like bunches of grapes; conidia subglobose 



