486 LACTARIUS 



12-15 mm., greyish white, equal. Gills white, then lilac, slightly de- 

 current, crowded. Flesh white, thick, firm. Milk white, becoming 

 violet on exposure to the air, mild (becoming acrid?). Spores "white, 

 globose, 8-9 /it, echinulate" Sacc. Cystidia "ventricose-subulate, 

 50-70 x 8-15/x" Rick. Woods. Oct. Rare. 



1589. L. umbrinus (Pers.) Fr. Cke. Illus. no. 942, t. 1006. 



Unibrinus, umber brown. 



P. 5 7'5 cm., more or less olivaceous umber, paler and yellowish when 

 old, convex, then plane, disc slightly depressed, often wavy and ex- 

 centric, dry,flocculoso-rivulose. St. 2-5-3-5 x 1-2 cm., concolorous, or 

 paler, apex white, attenuated upwards. Gills pallid, dingy yellowish, 

 slightly decurrent, thin, crowded, forked behind, 2 mm. wide. Flesh 

 white, becoming tinged with brown on exposure to the air, firm. Milk 

 white, forming grey spots when it has escaped, acrid. Spores white, 

 globose, Sfj., rough. Cystidia none. Taste acrid. Pine woods. Sept. 

 Oct. Rare. 

 L. plumbeus (Bull.) Fr. = Lactarius turpis (Weinm.) Fr. 



1590. L. piperatus (Scop.) Fr. (= Lactarius glaucescens Crossland.) 

 Cke. Ulus. no. 944, t. 979. Piperatus, peppery. 



Entirely white. P. 5-22-5 cm., becoming yellowish with age, umbili- 

 cate, then reflexed and infundibuliform, rigid ; margin involute at first. 

 St. 3-7 x 2-5 cm., equal, or obconical, obsoletely pruinose. Gills be- 

 coming pale ochraceous, decurrent, crowded, narrow, dichotomous, edge 

 obtuse. Flesh white, then yellowish, becoming sometimes greenish grey. 

 Milk white, often becoming greenish when dry, very acrid. Spores white, 

 globose elliptical, 6-9 x 6-8 /n, minutely punctate, with a large central 

 gutta. Cystidia "clavate, or fusiform-filiform, 60-70 x 8-9/1, obtuse, 

 very sparse" Rick. Taste very acrid. Said to be edible. Woods. 

 Aug. Oct. Common some years, (v.v.) 



var. pergamenus (Swartz) Quel. Cke. Illus. no. 943, t. 978. 



Pergamena, parchment. 



Differs from the type in the rugose wrinkled pileus, the longer thinner 

 stem, and the adnate, horizontal gills. Woods. Aug. Oct. Uncommon. 

 (v.v.) 



1591. L. veUereus Fr. Cke. Illus. no. 945, t. 980. Vellus, a fleece. 

 Entirely white. P. 10-30 cm., becoming stained or spotted with yellow, 



convexo-saucer-shaped, innato-pubescent, compact; margin strongly 

 incurved. St. 5-8 x 2-56 cm., becoming yellowish, equal, hard, 

 finely pubescent. Gills watery white, then pale ochraceous, adnato- 

 decurrent, arcuate, rather thick, somewhat distant, rather broad, 

 branched, edge acute. Flesh white, yellowish on exposure to the air. 

 Milk white, scanty, turning litmus paper red, very acrid. Spores white, 



