Shear and Dodge : Patellina, Leptothyrium, Peziza 145 



S. corneum (1878). When the spores of the flat types spread 

 out so that the spore masses coalesce a Hymenula is suggested, 

 as Hymenula rhoina (1893) (Ell. & Sacc), Bub. & Kab. (1912), 

 or a Tubercularia as interpreted by Halsted (1893) (T. rhoina 

 Halsted). Ordinarily nothing which might be called a stipe is 

 present, yet forms are met in nature and in cultures on twigs of 

 Rubus in which there is a distinct stipe-like base surmounted by 

 a flaring disk (pi. 8, fig. 7). 



The outer wall of the sporocarp is but a few cells thick. These 

 cells are thin-walled and nearly isodiametric. Toward the mar- 

 gin the cells are arranged in more or less parallel rows and be- 

 come considerably elongated and branched. Very long, branched 

 slender paraphyses-like hyphae line the cup portion and extend 

 even beyond the margin, sometimes producing a fimbriated edge 

 (pi. 8, fig. 10). These structures appear in no way to differ 

 from the conidiophores in their morphology, as they are found 

 among the sporophores in young fruit bodies. The spores are 

 borne terminally and become quickly detached, but cohere in a 

 mass which becomes elongated and cone-shaped in case the spores 

 are not washed away or there is not enough moisture present to 

 lead to the formation of the trembling drop on the sporodochium 

 which no doubt suggested the name Glocosporium tremellinum to 

 Saccardo. In nature very small sporodochia may develop on old, 

 dead plant parts and in culture they form in the water of gutta- 

 tion where there is an abundance of aerial mycelium formed. 

 These fruiting bodies, consisting of a few conidiophores united 

 together, are clearly gymnocarpous and of the Tubercularia type, 

 being open from the very beginning. They scarcely resemble 

 the large patellate, urceolate or flack-shaped structures commonly 

 collected (pi. 8, figs. 1-4). The amount of margin or the depth 

 of the cup may become so great as to form a globose or pear- 

 shaped structure which in no way differs from a true pycnidium 

 with a large ostiole through which the spores ooze in a broad cir- 

 rhus (pi. 8, figs. 6, p). In normal forms in nature most of the 

 dark color is confined to the basal portion. The margin is at first 

 inrolled (pi. 8, fig. 5), later becoming expanded and frequentlv 

 revolute and lobed (pi. 8, fig. 2). 



