1918^ The Lactarias of I^oetii Carolina 21 



13. Lactarius scrobiculatus (Scop.) Fr. 



Plates 1G and 40. 



Cap up to 12 cm. broad, deeply depressed in center aud finally in- 

 fundibuliform, margin even, incurved, distinctly tomentose at first, 

 glabrous or nearly so at maturity, surface rather light bro\\Tiish- 

 yellow or pale buffy-yellow, distinctly or scarcely zoned, the super- 

 ficial layer a whitish, slightly shining material which seems collapsed 

 in zones and areas, thus giving the surface a roughish appearance 

 under a glass, viscid when moist ; flesh rather thin, firm, white, turn- 

 ing yellow when cut, odor noticeable and rather soapy. Milk quite 

 acrid, white, then changing quickly to sulphur-yellow. 



Gills subdistant to rather close, pale creamy-flesh color, turning 

 sulphur-yellow when cut, then brownish, slightly decurrent, none or 

 few forked, 5-10 mm. wide in middle. 



Stem 3-4.5 cm. long, tapering downward, 1-2.8 cm. thick in center, 

 firm, hollow, surface glabrous, typically marked all over with more or 

 less circular or elliptic brownish yellow pits that are usually of very 

 variable size, surface between them a light cream color or pure white. 

 Earely the spots are absent, as in our Coll: No. 1803. The stem is 

 frequently furnished with a distinct elevated ridge near the top which 

 represents the collapsed fibers which connected it with the gills in 

 youth. 



Spores (of No. 2371) creamy white, distinctly warted. elliptic, 

 4.8-6.3 X 6.3-7.4/A. 



Our Chapel Hill form of this species is a large s<iuat plant that 

 seems confined to pine or mixed pine and deciduous woods. The 

 gills are not crowded and are slightly tinted with flesh-color. 



1863. On rocky, wooded hillside, Rocky Ridge Farm. September 22. 1915. 

 Photo. Spores 5-5.5x6.6-7.5^. Stem not spotted. 



1957. In rather dry soil, pine woods between Strowd's Sprinp and Howell's 

 Branch, November 3. 1915. 



1965. Under pines near old "Rock Quarry," November 7, 1915. Spores ellip- 

 tic, tuberculate, 6.2-7.5x7-8.2^. 



2*371. Pine woods (with oaks) southwest of athletic field. July 5. 1916. Spores 

 creamy with a faint salmon tint, elliptic, tuberculate. 4.8-6.3 x 6.3-7.4^. 

 GUIs subdistant, 10 cm. wide. 



Asheville. Beardslee. 



