CBIBRARIA.] IIETERODEEMACE^. 145 



10., C. pyriformis Schrad., Nov. Gen. PL, p. 4 (1797). 

 Plasmodium ? Total height 1 to r7 mm. Sporangia turbinate 

 or globose, stipitate, erect, gregarious, 0-3 to 0-5 mm. diam., 

 purplish-brown; cup about one-third the height of the sporangium, 

 pale brownish-yellow, perforated and irregularly toothed at the 

 margin, or equally toothed, beset with large round purple-brown 

 plasmodic granules, 2 to 2-5 /a diam., arranged in broad lines 

 radiating from the base or evenly distributed; nodes of the net 

 varying in" shape and size, charged with dark round plasmodic 

 granules and connected by pale brownish-yellow threads. Stalk 

 stout or slender, 0-5 to 1 mm. high, dark purple-brown. Spores 

 pale ochraceous or pinkish, almost smooth, 5 to 6 /x diam. — Rost., 

 Mon., p. 237; Cooke, Myx. Brit., fig. 14; Mass., Mon., p. 55. 



a. geuoina : sporangia pyriform ; nodes flat, polygonal, often 

 branching ; stalks stout, furrowed. 



/3. notabilis : (Rex, in Htt.) sporangia globose; nodes convex 

 and prominent, rounded or irregular ; stalks slender. 



Plate LV., A. — a. sporangia after dispersion of spores, a. genuina, x 20 ; 

 J. part of net and cup of sporangium, x 180 (Shrewsbury, England) ; e. 

 sporangium from mounting in Canada balsam, x 20 (Germany, Eostafinski's 

 type) ; d. part of net and cup of same, x 180 ; e. sporangia after dispersion 

 of spores, /3. notabilis, x 20 ; /. g. part of net and cup of brown and dark- 

 brown sporangia, x 180; Ji. spore and plasmodic granules, x 600 (United 

 States). 



The variety |8. notabilis appears to be the American form of 

 C. pyriformis ; it differs from the European gatherings in the globose 

 sporangia, the slender stalks, the delicate threads of the net, and in 

 the nodes, which, though variable in shape, are usually prominent and 

 convex, often approaching forms of C. tenella and C intiicata. It has 

 been obtained from several of the American States. The abundance 

 of plasmodic granules varies in different gatherings. 



Hah. On dead fir-wood. — a. France (Paris Herb.) ; a. Berlin 

 (B. M. 672) ; o. Germany (Strassb. Herb.) ; /3. New York (L:B.M.113) : 

 Virginia (L:B.M.113) ; N. Carolina (L:B.M.113). 



11. C. languescens Rex, in Proc. Acad. Nat. Sc. Phil. (1891), 

 p. 394. Plasmodium? Total height 2-5 to 3 mm. Sporangia 

 globose, stipitate, drooping, scattered, 0'25 to 0-35 mm. diam., 

 dull red ; cup one-third the height of the sporangium, red-brown, 

 shining; beset with purple-brown plasmodic granules, 0'3 to 1 

 /i diam., arranged in close lines radiating from the apex of the 

 stem ; margin toothed ; nodes of the net purplish-brown, thickened, 

 rather prominent, charged with dark granules, polygonal, with 

 few free rays, and slender connecting threads ; meshes of the net 

 triangular. Stalk very slender, subulate, somewhat sinuous or 

 wavy, dark red-brown. Spores pale red, almost smooth, 5 to 6'5 

 ft. diam. 



Plate LV., B. — a. sporangia after dispersion of spores, x 20 ; J. part of 

 net and margin of cup of sporangium,, v. 180; c. spore and plasmodic 

 granules, x 600 (United States). 



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