BoT.— Vol. I.] HARKNESS—CALIFORNIAN HYPOG/EI. 281 



107. Sphaeria (Hypocrea) Zobelii Tul. 



Sphceria (Hypocrea) Zobelii Tx^x^., Fungi Hypo., p. 186, Tab. XIII, fig. r. 

 Microthecimn Zobelii Corda, Icon. Fung., T. V., pp. 30 et 74, Tab. VIII, 

 fig- 53- 

 Fungorum hypogaeorum gregatim parasitica, sphaerica, brevissime mucro- 

 nata ore subintegro; perithecio membranaceo tenuissimo; sporangiis oblongis 

 3-8-sporis; sporis ellipticis et utrinque truncatis, levibus, atris. (Tul. Fungi 

 Hypo.) 



No. 255;^, Harkness Coll. 



Found with and upon the parenchyma of Geofora 

 niagnata. 



In this specimen we find that the perithecia is globose or 

 slightly oblong vertically, with a well developed ostiolum. 



This parasite was discovered by Corda in Choiromyces 

 and referred to a new genus, Microthecimn. In his review 

 of the work of Corda, Tulasne declines to accept his 

 generic name and places it in the SphcBriacece, calling it S . 

 Zobelii. 



Sporophaga, gen. nov. 



Parasitic and deeply seated within the ascus and spores of host-plant; a 

 hypogaeous fungus. 



108. Sporophaga cyanea, gen. et sp. nov. 



Plate XLIII, Figs. i5a-i5^. 

 Ustilago cyanea Ces. 



Hypogseous, produced within the spore oi Balsamia vulgaris in groups of 

 from three to six within each spore; the spores of the host-plant, together 

 with the inclosing ascus, soon separate, when the spores of the parasite are 

 seen to be grouped together; spores ovate, dark, 4x6 //. 



Type, No. 231, Harkness Coll. 



The parasite does not appear until the spores of the host- 

 plant are fully matured. After the disappearance of the 

 spore and ascus the parasitic spores remain in groups of from 

 twenty to forty, being kept in contact by the entanglement 

 of the hyphae; in due time, however, they separate and are 

 dispersed. 



