CHONDRIODERMA.] PHTSARACB^. 85 



13. C. floriforme Eost., Mon., p. 184 (1875). Plasmodium 

 greyish- white. Total height 1 to 2 mm. Sporaugia globose, 

 stipitate, erect, smooth, crowded, 0-8 mm. diam., varying from 

 white to ochraceous-brown; sporangium-wall splitting into several 

 revolute petal-like lobes, ochraceous-brown on the inner side, 

 cartilaginous, obscurely granular, with an inseparable mem- 

 branous inner layer. StalJj equal, furrowed, 0-5 to 1 mm. long, 

 0-15 mm. thick, ochraceous-brown, rising from a strongly developed 

 common hypothallus. Columella ovoid or hemispherical, brown, 

 densely calcareous. Capillitium of slender, sparingly branching 

 threads, with scattered bead-hke thickenings, thicker and anasto- 

 mosing at the base, dark violet-brown. Spores red violet-brown, 

 with widely separated obtuse warts, 9 to 1 1 /i diam. — Cooke, Myx. 

 Brit., p. 41 ; Mass., Mon., p. 198; Macbride, in Bull. Nat. Hist. 

 Iowa, ii., p. 149. Sphcerocarpus Jloriformis Bull., Champ., p. 142, 

 t. 371 (1791). Diderma floriforme Pers., in E,bm., N. Mag. Bot., 

 i., p. 89 (1794). Leangiumflorijorme Link, in Berlin Ges. Nat. Pr. 

 Mag., iii.,p. 26; Rost., in Fuckel, Symb. Myc, Nachtr. 2, p. 73. 



Plate XXXIV., B. — a. sporangia moist and unexpanded, x 20; i. sporangia 

 dry and expanded, x 20 ; u. capillitium and spores, x 280 ; d. spore, x 600 

 (England) ; e, sporangia expanded and showing clavate columellse, x 20 

 (United States). 



The red-brown spores with scattered warts distinguish this species 

 from all forms of C. radiatum. 



Hah. In crevices at the base of oak stumps, etc. — Epping Forest, 

 Essex (L:B.M.64) ; Germany (B. M. 533) ; Ohio (L:B.M.64) ; Iowa 

 (B. M. 817) ; 8. Carolina (B. M. 925). 



14. C. Hookeri Lister. Plasmodium? Sporangia subglobose, 

 stipitate, erect, gregarious, 1 mm. diam., rufous with a slight 

 iridescent lustre ; sporangium- wall of two layers, the outer car- 

 tilaginous, purplish-brown, closely combined with the colourless 

 inner layer. Stalk equal from a broader base, furrowed, 0'7 mm. 

 high, purplish-brown, densely charged with lime. Columella 

 cylindrical, obtuse, rugose with the expanded bases of the capilli- 

 tium, 0'4 mm. high, 0'17 mm. thick, purplish-brown, densely 

 charged with lime. Capillitium of lax branching and anastomosing 

 threads, nearly equal in breadth throughout, 2 jj. diam., colourless 

 or pale violet. Spores dark purple-brown, spinose, 13 to 15 jx 

 diam. — Diderma Hookeri Berk., in PI. Nov. Zel., p. 191 (1855). 

 Lwmproderma Eooheri Host., Mon., App., p. 24. Diachcea 

 Hookeiri Mass., Mon., p. 260. 



Plate XXXV., A. — a. remains of sporangia, pn fern frond, natural size ; 

 b. stalk and columella, x 20 ; a. capillitium, with .portion of columella, 

 oontaming lime-granules, x 280 ; d. spore, x 600 (New Zealand). 



This is represented by a single gathering, and appears to have been 

 in imperfect preservation when first examined by Berkeley. Eostafinski 

 writes that it was iu an injured state when seen by him ; probably it 

 was then in much the same condition as at the present time. The speci- 

 men consists of a considerable number of sporangia on a frond of 

 Hymenophyllum, but little remains beyond the stalks and columellse 



