22 Journal of the Mitchell Society \_June 



14. Lactarius insulsus Fr. 



Plates 17 and 40. 



Cap medium to large, usually about 7-10 cm. and up to 15 cm. wide, 

 deeply depressed in center, smooth all over, moderately viscid when 

 wet, varying greatly in color, deep orange to pale buif or straw color, 

 conspicuously and regularly zoned, or very obscurely so, especially 

 when old and wet, and in pale-colored plants (as in No. 1637). Flesh 

 white when young, becoming buif in age, up to 6 mm. thick near the 

 stem, firm; odor somewhat acrid, but not nearly so strong or of the 

 same character as in Lactarius coleopteris. Milk white, rather slowly 

 but very acrid, unchanging, sparse. 



Gills ochraceous-buff, deeper in color than most other species, ap- 

 pearing somewhat decurrent by the shape of the cap, nearly equal in 

 width their whole length, and about 4-7 mm. deep, of unequal length, 

 rarely forked, rather inconspicuously veined, varying from moder- 

 ately close to quite distant. 



Stem 2.5-5 cm. long, varying much in thickness, pointed at base, 

 light creamy-buff or with a flesh tint, often vaguely spotted, but not 

 with the conspicuous pock marks of L. scrobiculatus, smooth, stuffed, 

 or becoming hollow. There is usually a lighter colored ring at the top 

 of the stem which may remain noticeable in the dried plants. This is 

 not so conspicuous as in L. coleopteris. 



Spores light cinnamon-buff, spherical to subspherical or short- 

 elliptic, strongly warted and ridged, about 5.5 x 7/*. 



This species can be distinguished in the field from L. scrobiculatus 

 by the milk not turning yellow, the entire absence of tomentum on the 

 margin, and the faint or absent pock marks on the stem ; from L. tor- 

 minosus by the absence of the heavy marginal tomentum of that 

 species ; from L. chrysorheus and L. theiogalus by the milk not turn- 

 ing yellow. 



115. Battle's Park, September, 1908. 



492. Near Battle's Branch, back of Dr. Pratt's, October 4, 1912. Photo. 

 1637. Under leaves in an old road in woods, Battle's Park, July 24, 1915. 

 Photo. Spores light cinnamon-buff, nearly pale orange-yellow of 

 Ridgway, subspherical, warted, 6.8-7.8^. 

 1792. Mixed woods in pasture back of Pritchard's, September 16, 1915. 



