156 Journal of the Mitchell Society [J^lne 



become soinewliat free all around. Texture leather}^ and pliable, not 

 brittle when dry. In this lot of numerous patches one plant, emerg- 

 ing- from a lenticel, was attached by only a point eccentrically placed, 

 all the rest of the cap being free. When young the plant appears as 

 a little peltate disc, but this soon expands and except for the free mar- 

 gin attaches itself to the bark as it grows. 



Basidia like those of a Tremella, ovate, four-celled by longitudinal 

 divisions, 9.3 x IS/x, sterigmata long. Slender branched threads grow 

 up densely beyond the basidia to form the hymenial surface. Spores 

 white, smooth, bent, sausage-shaped, 4-5.5 x 12.5-17.3/a. 



This is a remarkable plant and was first described from South 

 Carolina as a Corticium. It would be referred at once to Corticium 

 or Stereum if it were not for the peculiar basidia. The pretty, deli- 

 cate rosy color is preserved in drying, 



3829. On sweet gum (Liqiiidamber) nvigs, back of Peabody Building. Decem- 

 ber 6, 1919. Photo. 

 395.'!. Oil frondoso twigs on grape arbor, January 17, 1920. 



SEBACINA 



Resupinate, on bark or wood as in Corticium or encrusting herb- 

 aceous stems or mossy tree bases from the ground; texture various, 

 waxy to leather}" or coriaceous; basidia ovate and longitudinally sep- 

 tate as in Tremella ; spores white, smooth, mostly enlongated and bent 

 or flattened on one side (in S. cenerea Bres. they are said by Bresadola 

 to be subglobose, 12-13 x 12-15/x, in 8. caesia Tul. they are given by 

 Patouillard (Tab. Analyt. No. 681) as ovoid, 8 x 10-12^). We have 

 found four species in Chapel Hill and two others are reported from 

 the state. See Burt. Ann. Mo. Bot. Card. 2 :749. 1915. Of the four 

 species we have found only one can be distinguished in Burt's 

 monograph. We have tried to determine the other three from the 

 European literature, but not having been able to do so as yet have 

 decided to let them go unnamed until we become more familiar with 

 the genus. Burt has seen our plants, but has not cared to give a 

 positive opinion from the material sent. All our figures are from 

 fresh material and the spore characters taken from good spore prints. 



Key to the Species 



Diffused as a thin or thickisli crust on dead Avood, with 

 the habit of a Corticium. 



Plant up to 1 or 1.5 mm. thick ; spores 6.3-9 x 7.7- 



12.2^ S. sp. (No. 4116) (2) 



