LACTARIAE ОЕ THE UNITED STATES 103 
parent latex is the prominent feature of this plant. In color it 
varies ‘from brownish-fawn to cinnamon, or it may approach the 
color of L. camphorata. Peck says that our plant has a slight 
aromatic odor, but no mention of an odor is made by the European 
writers, and it may prove not to be constant in the American plant 
68. LACTARIA ISABELLINA Burl. Bull. Torrey Club 34: 88. 
1907. [As Lactarius] 
Pileus fleshy, not very thick, convex, then broadly convex, at 
length infundibuliform, umbonate, red-fulvous in the center, buff 
(309) toward the margin, all fading to buff when mature, azonate, 
dry, glabrous, somewhat roughened and wrinkled in the center 
FIGURE 15.  Lactaria isabellina Burl. No. 38, 1907. 
especially when old, 3—4.5 cm. broad, margin glabrous, even or 
at length faintly striate, sometimes areolate-wrinkled ; gills pale- 
yellowish, or tinted with the same color as the pileus, becoming 
reddish where bruised, forking near the stem or midway to the 
margin, close, thin, slightly decurrent, 3 mm. broad, or twice the 
thickness of the pileus ; stem of the same color as the pileus, equal 
or slightly tapering upwards, tomentose at the base, stuffed, be- 
coming hollow, 4 cm. long, 6 mm. thick ; flesh white, staining yel- 
lowish from the milk ; spores white, slightly echinulate, 6-7.5 # X 
7-8.5 и; latex white, at length (after five minutes) becoming sul- 
phur-yellow, or at least staining the gills and flesh yellow, astrin- 
gent, then acrid, abundant. (FIGURE I5. 
Has.: In leaf-mold or sphagnum, moist, mixed or spruce 
woods. August and September. 
Distris.: Vermont, 460 meters, Burlingham 85, 1906, type ; 
North Carolina, 1500 meters, Burlingham 38, 1907. 
