24 LACTARIAE OF THE UNITED STATES 
pileus and the stem. The latex is cream-colored or dries yellow- 
ish on the elle, The change in color of the pileus and stem dur- 
ing drying is a marked characteristic. 
The type specimens are in the herbarium of the N. Y. Botanical 
Garden. The specimen which I found in North Carolina has the 
gills a little more distant, but otherwise appears like the type. It 
occurred in oak-chestnut woods at ап elevation of 1000 meters. 
5. ГАСТАВТА DECEPTIVA Peck, Ann. Rep. М. Y. St. Bot. 38: 125. 
1885. [As Lactarius.] — Hennings, in Eng. & Prantl, 
Nat. Pflanzenfam. 1! * *; 216. 1898. 
Pileus fleshy, firm, convex-umbilicate, then expanded and cen- 
trally depressed or somewhat infundibuliform, white or whitish, dry, 
glabrous at first, becoming torn into fibers and cracked as the 
pileus matures, 5-15 cm. broad, margin involute at first and covered 
with a dense soft cottony tomentum which fills in the space between 
the margin and the stem, then spreading or elevated and more or 
less fibrillose; gills whitish or cream-colored, some forking, some- 
what distant, adnate or decurrent, rather broad ; stem white, nearly 
equal, pruinose-pubescent, solid, 2-8 cm. long, 10-40 mm. thick ; 
flesh white ; spores white, globose to elliptical, echinulate, 8-9 и X 
9-12 и; latex white, unchanging, acrid. Edible. 
Нав. : On the ground in woods, especially near hemlock trees, 
rarely in oak-chestnut woods. July, August, and September. 
DISTRIB.: New York, Peck, Shear, Jackson, Burlingham; Maine, 
White ; Vermont, Burlingham 21, 1906; Massachusetts, Vai/ ; Con- 
necticut, Underwood & Earle, Hanmer 682 ; Pennsylvania, Herést ; 
Virginia, Murrill до; North Carolina, 1000 to 1675 meters eleva- 
tion, Burlingham 56, 1907; Alabama, Ear/e ; Ontario, Guillet. 
Irrus;.: Atkinson, Stud. Am. Fungi, f. 120, 121, Lactarius 
resimus ; White, Conn. Geol. and Nat. Hist. Surv. Bull. з: 76 8. 
Exsic. : Shear, New York State Fungi 70. 
DISTINGUISHING FIELD-MARKS: This species has been much 
confused with Z. vellerea Fr. and Z. piperata (L.) Ег., but differs 
decidedly from both. The mature glabrous form of L. deceptiva 
resembles the latter in general appearance, but the texture of the 
pileus, the broader and more distant gills, and the larger more 
echinulate spores distinguish it from that species. The pileus of 
L. vellerea is covered over the entire surface with a short velvety 
tomentum, while the center of 7. deceptiva is practically glabrous 
