412 



RESEARCHES ON FUNGI 



more or less decurrent. Basidia clavate, 14-17-4 x 5 (jt, ; spores 

 minute, ellipsoid or ovoid, apiculate below, hyaline, eguttulate or 

 with one guttule, 4—5 X 2-5-3 (x. 



" On leaves of Eriobotrya japonica, Melastomaceae, Compositae, 



and Rubiaceae near 

 ^ ^ ^ RiodeJaneiro(Brazil) 



in company with Stil- 

 hum flavidum Cooke 

 (its abortive form)." 

 The sporophore, 

 as may be seen from 

 Figs. 203, 204, and 

 213 (pp. 404,405, and 

 424), is a much larger 

 organ than the gem- 

 mifer. Its height was 

 found to vary from 

 0-6 cm., as shown 

 in one produced on 

 a Bryophyllum leaf 

 (Fig. 218, p. 429), to 

 1 • 5 cm. where growi^h 

 took place on a 

 medium of bread 

 crumbs. The young 

 stipe is only very 

 slightly or not at all 

 heliotropic and soon 

 becomes negatively 

 geotropic so that, in the end, the axis of the pileus becomes vertical 

 (Fig. 213, p. 424). Two illustrations showing a median- vertical 

 section through a pileus and the appearance of the under side of a 

 pileus are reproduced respectively in Figs. 206 and 207. 



In a gill (Fig. 208, A), the trama consists of large elongated cells, 

 the subhymenium of smaller much more numerous cells, and the 

 hymenium of basidia and paraphyses. The hymenium lacks 

 cystidia (pleurocystidia) but there are numerous fringed cystidia 



Fig. 208. — Omphalia flavida. A, vertical section 

 through a lamella of a perfect fruit-body : 

 a, the hymenium made up of basidia, each 

 bearing four spores, and paraphyses ; b, the 

 subhymenium ; and c, the trama. B, a 

 cheilocystidium (cystidium on the free edge of 

 a gill) ; it is fimbriate, like the clavate cells 

 on the exterior of the pileus. Drawn by 

 A. H. R. Buller and Ruth Macrae. Magnifi- 

 cation, 540. 



