115 



Subgen. III. Acioniscium. — Menibrana spor;in<,Mi 

 simplex vel duplex. Columella nivea, raro fusccsccntc all)a 

 vel incarnato-flava. Stipes, si adest, niveus. 



6. D. crustaceura Fr. Syst. myc. IIF, p. 124. 

 Sporangia sessilia, nunc sparsa, bemisphaerica, nunc 



densissime congesta bypotlialloqve communi, bene evoluto 

 insidentia, beraispbaerica, reniformia vel e pressione mutua 

 angulata. Columella distincta, albido-vel incarnato-flava. 

 Flocci capillitii e columella fasciculatim surgentes, tenelli, 

 angulis valde acutis furcati, dilute violaceo-fusci. Sporae 

 sphaeroideae, valde spinulosae, violaceo sive fusco-atrac, diam. 

 11 — 15 ramm. 



Syn. Didymiimi complanatum Schrad. Nov. Plant. Gen. p. 

 24, t. 5, f. 5. Fr. Syst. myc. III, p. 125. Z>. conflnens Eostap. 



y -V- 



Sluzowc. p. 164. D. crustacetim Rostaf. Sluzowc. Dod. I, p. 22. 

 Hab. Supra truncos Alni hicanae hinc inde circa Mus- 

 tiala, mensibus Septembri et Octobri. Qvoqve prope Abo 

 mense julii observatum. 



Var. |3. obducens. Didijmium ohducens Karst. in Not. 

 Sallsk. pro Faun. et Flor. Fenn. Forh. IX, 1868, p. 356. 



Sporangia irregularia (plasmodiocarpa), applanata, de- 

 pressa, saepe urabilicata, subtus concava, solitaria vel gre- 

 garia, interdum densissime stipata, stipitibus brevibus vel 

 brevissimis, irregularibus, inferne hitioribus, e hypothallo 

 communi explicatis. 



Hab. Basin trunci Alni incanae, virgulta graminaqve 

 circumjacentia obtegens prope Mustiala. 



7. D. effusum (Link.) Fn. Syst. myc. III, p. 124. 



Sporangia sparsa vel gregaria, sessilia, irregulariter he- 



misphaerica, applanata. Columella hemisphaerica, nivea vel 



b 



