IfJlfJ] The Hydxums of North Caeolixa 169 



but one species of this type at Chapel Hill, and I think it best to refer 

 it to H. imbricatum. The scales may become very dark on a little 

 exposure. Again they may be represented only by inherent mottlings 

 except in the very center, and such plants (as our No. 1525) could 

 as well be referred to H. laevigatum. All gradations are found be- 

 tween. Hydnum laevigatum has been listed from North Carolina by 

 Schweinitz, Curtis, and Memminger. As understood in America, the 

 species seems to differ from H. imbricatum only in its nearly smooth 

 cap, the center more or less scaly. As all gradations occur between 

 this condition and the typically scaly cap of the latter we do not know 

 how to separate them. Hydnum subsquamosum has also been reported 

 from this state by Curtis and by Memminger (MS. notes) but seems 

 equally elusive and uncertain in its characters.* 



291. Oak woods, top of Lone Pine Hill, September 14, 1910. 



413. Near path from west gate of campus, south of Dr. Battle's, October 



31, 1911. 

 467. Woods on hill south of branch, Battle's Park, September 30, 1912. 

 525. Woods east of schoolhouse, October 9, 1912. Scales inherent except in 



very center. 

 841. Woods east of Tenny's, September 26, 1913. 

 1182. Mixed dry woods south of athletic field, July 20, 1914. 



Arden, September, 1915, sent by Mrs. I. M. Jervey. Size 21.5 x IS cm. 



(U. N. C. Herb. No. 2016). 

 Middle and upper districts, earth in woods. Curtis. 



4. Hydnum cristatum Bres. 



Sarcodon crislalus (Bres.) Banker 



This species, the type of which was collected at Blowing Rock by 

 Atkinson, is reported by Banker from several Northern States. We 



*H!i(lnurn canum Schw. was described from this State. Of it Banker says: "The speci- 

 men in the Schweinitz herbarium throv's little light on this species as it is a mere fragment 

 and sufTRests a tough coriaceous jilant rather than a fleshy one. Fries treated the sjiecies as 

 a synonym of 77. grocite and Schweinitz himself expressed doubt as to the validity of the 

 species." The original descrijition is as follows (Syn. Fung. Car. 77. 1818): 



"H. cinereo-albidum. ]iileo carnoso glabro, subulis et stipite longis. Passim in abruptis 

 muscosis. Magnitudo Hydni subscpiamosi, \incialis et triuncialis." 



Ilildnum Ciirlixii Berkeley, described from South Carolina, is of doubtful validity. Tlie 

 original description is as follows (Grevillea 1:71. 1872): 



"Fuligineo-fuscum ; pileo orbiculari laevi; margine inflexo; stipite centrali sursum at- 

 tenuato: aculeis elongatis ac\itis integris. No. 280il. Car. Inf. 



"Whole plant of a dingy brown; pileus % inch across, even: 7nargin inflexed; stem 

 bull)0us at the base, where it is nearly M an inch thick, attenuated upwards; spines 

 even, entire, elongated. Allied to II. laei-igatum." 



