NAUCOEIA. 163 



The plant figured is not tlie typical form; plleus f-li in. 

 Stem li-2i in. With a distinct bulb between the ascend- 

 ing and descending portion of the stem. It is probably a 

 distinct variety. (Cooke.) 



Naucoria semiorbicularis. Bull. 



Pileus 1-2 in. across, flesh thin, whitish ; hemispherical 

 then expanded, even, glabrous, slightly viscid, at length 

 rivulose, tawny-ferruginous, ochraceous when dry; gills 

 adnate, rarely sinuate, very broad, crowded, pallid then 

 ferruginous ; stem 2-4 in. long, 1-1^ line thick, tough, 

 nearly straight, pale ferruginous, shining, base usually 

 darker, containing a free strand in the interior which readily 

 splits into fibrils; spores elliptical, 10 x 5-6 fx. 



Agaricus semiorbicularis, Bull., Champ., t. 422 ; Cke., Hdbk., 

 p. 179; Cke., Illustr., pi. 493 (not typical, if the right 

 species). 



Amongst short grass, &c. 



Grills 3 lines broad. Allied to N. pediades, distinguished 

 by the viscid pileus and ferruginous stem. 



Naucoria tabacina. D.C. 



Pileus ^-1 in. across, flesh thin, almost plane, very obtuse, 

 even, glabrous, hygrophanous, margin involute, umber, then 

 cinnamon-bay when moist, dingy pale tan whan dry ; gills 

 adnate, crowded, plane, at length cinnamon-bay ; stem 1-2 

 in. long, 1-2 lines thick, glabrous, naked, cinnamou, base 

 fuscous, hollow, sometimes slightly wavy ; spores elliptical, 

 8-9 X 4r-5 ju. 



Agaricus tabaeinus, D.C, Flor. Fr., vol. v. p. 46 ; Cke., 

 Hdbk., p. 179 ; Cke., lUustr., pi. 493b. 



By waysides, &c. 



Subcaespitose. All one colour when moist, with the habit 

 of Naucoria cucumis ; pileus becoming cionamon-bay, dingy 

 tan when dry ; 3-9 lines broad, rather fleshy. Gills some- 

 what linear, not broader behind, at first yellowish, soon 

 umber, at length becoming ferruginous. Stem at times 2 in. 

 long, equal, flexuous ; sometimes only about 1 in. long, 

 thicker, attenuate at the base. A distinctly interwoven, 

 appendiculate veil is rarely present ; whereas in others from 

 the same. cluster, not a trace of the veil is visible. (Fries.) 



M 2 



