LACTARIAE OF THE UNITED STATES 79 
46. Lacraria ALPINA Peck, Ann. Кер. N. Y. St. Mus. 27: 96. 
1875. [As Lactarius.] Hennings, in Eng. & Prantl, 
Nat. Pflanzenfam. 1'** : 216. 1808 
Pileus fleshy, thin, convex, then plane or depressed in the cen- 
ter, sometimes papillate, fulvous to fulvous-isabelline, azonate, dry, 
minutely squamulose, especially toward the center, 1.5-4 cm. broad, 
margin involute, then merely arched, even; gills pallid, then yel- 
lowish and pruinose, seldom forking, close, thin, decurrent, narrow ; 
stem of the same color as the pileus, or slightly paler, equal, dry, 
glabrous, stuffed, becoming hollow, 2-5 cm. long, 3-5 mm. thick ; 
spores white, globose, echinulate, 6.5-8 и; latex white, unchang- 
ing, acrid. 
Has.: Borders of woods. July, August, and September. 
DISTRIB. : New York, Peck, Earle 864; Vermont, Burling- 
ham тоб, 1906; Maryland, Banning; District of Columbia, Mur- 
rill 1491 ; Virginia, 914 meters, Murrill 17; Alabama, Earle. 
Плозт.: Banning, Folio Md. Fungi (at N. У. St. Museum, 
Albany), A. 79. 
DISTINGUISHING FIELD-MARKS : The small size, the tawny-ochra- 
ceous color, the squamulose pileus, and acrid latex. It differs 
from Lactaria helva Fr. т its small size, in the pileus being merely 
squamulose instead of floccose-squamulose, and in the milk never 
being watery. It is of about the same size and color as Lactaria 
subdulcis (Pers.) Fr. 
47. LACTARIA RUFULA Peck, Bull. Torrey Club 34: 346. 1907. 
[As Lactarius] 
Pileus fleshy, firm, broadly convex, becoming somewhat in- 
fundibuliform, without an umbo, brownish-red, azonate, dry, appar- 
ently glabrous, 5-10 cm. broad; gills pinkish-yellow, becoming 
darker with age and pruinose, close, adnate; stem colored like the 
pileus but paler, equally or slightly tapering upwards, sometimes 
with root-like extension, often with yellowish-brown strigose hairs 
at the base, stuffed, 4-8 cm. long, 5-6 mm. thick; spores creamy- 
white, globose, verruculose, 8-10 м; latex white, acrid. 
Has.: Rich soil and leaf-mold under trees. March. 
Distris.: California, Patterson & Nohara. 
This species seems to be separated from L. rufa (Scop.) Fr. 
chiefly in the absence of an umbo, and in a cespitose habit of 
growth. I have not seen L. rufa living, but it seems to me that 
