REPORT OF THE STATE BOTANIST I908 37 



sinuate adnate, white or whitish becoming tawny; stem fragile, 

 flexLious, pruinose, stuflfed or hollow, sometimes slightly bulbous, 

 whitish, brownish below ; spores coarsely nodulose, .0004-.0005 of 

 an inch long, .00024-.0003 broad; cystidia .oo2-,oo3 of an inch 

 long, .0008-.0012 broad. 



Pileus 4-5 lines broad; stem 1.5-2 inches long, .5-1 line thick. 



Dark vegetable humus under deciduous trees. Stow, Mass. 

 July and August. S. Davis. 



The species belongs to the section Rimosi. It is variable. It 

 differs from I. u m b o n i n o t a Pk. in its paler color of the pileus, 

 its stuffed or hollow stem and its larger spores. From I. r i m o s a 

 (Bull.) Karst. it is separated by its nodulose spores and from 

 I. asterospora Quel, by its smaller size, paler shining pileus 

 and its stuffed or hollow stem with no reddish tint. It is also 

 peculiar in having a slight webby veil when very young. 



Pileus tenuis, conicus convexusve, deinde expansus, umbonatus, 

 fibrillosus, radiate rimosus, pallido-brunneus, fulvo-brunneus, 

 nitidus, umbone plerumque nigro-brunneo, carne alba ; lamellae 

 conferlae, adnatae sinuato-adnataeve, albae albidaeve, deindae ful- 

 vae; stipes fragilis, flexuosus, pruinosus, fractus fistulosusve, inter- 

 dum leviter bulbosus, sursum albidus, deorsum brunnescens; 

 sporae sparsim nodulosae, 10-12 x 6-8 /^, cystidia 55-80 x 20-30/^. 



Pileus 8-10 mm latus ; stipes 3-5 cm longus, 1-2 mm crassus. 



Panaeolus semilanceatus 



Pileus thin, conic-ovate, umbonate, grayish brown ; lamellae as- 

 cending, black when mature ; stem slender, glabrous, hollow, brown ; 

 s{X)res ellipsoid, compressed, variable in size, black, .0005-0007 

 of an inch long, .0003-.0005 broad. 



Pileus 4-6 lines long, 3-4 broad; stem 1.5-2.5 inches long, 

 •5~75 of an inch thick. 



Dawson, British America. September 1905. Communicated by 

 E. B. Sterling. 



Similar to Psilocybe semilanceata Fr. in size and 

 shape, but differing in color and spore character. 



Pileus tenuis, conicus ovatusve, umbonatus, griseo-brunneus ; 

 lamellae ascendentes, in maturitate atrae; stipes gracilis, glaber, 

 fisluiosus, fuscus ; sporae ellipsoideae, comi)rcssae, in magnitudine 

 variabiles, atrae, 12-18 x 8-12 !>. 



J 'ileus 8-12 mm longus, 6-8 mm latus; stipes 4-6 cm longus, 

 1-1.5 '"'^ crassus. 



