Part 3, 1910] BOLETACKAE 153 
1 cm. long, concave to plane in mass, yellowish, mouths small, angular, pink: spores 
oblong-ellipsoid, smooth, pale yellowish-brown under a microscope from dried specimens, 
11-12.5 X 4-5: stipe very much swollen at the center, contracted at the apex and base, 
perfectly even and glabrous, concolorous with a rosy tint in certain parts, yellowish at the 
base, solid, yellowish-white within, 9 cm. long, 7 cm. thick at the center. 
Type collected near San Francisco, California, November, 1903, Alice Eastwood. 
DISTRIBUTION : Known only from the type locality. 
5. Suillellus Morrisii (Peck) Murrill. 
Boletus radicans Morgan, Jour. Cine. Soc. Nat. Hist. 7: 6. 1884. Not &. radicans Pers. 1801. 
Boletus Morrisit Peck, Bull. Torrey Club 36: 154. 1909. 
Pileus convex, gregarious or at times subcespitose, 3-8 cm. broad, 1-2 cm. thick; 
surface dry, finely pulverulent, dark-fiavovirens to light-olivaceous, becoming partially or 
wholly glabrous and dull reddish-brown ; margin thin, inflexed, projecting beyond the 
tubes, often radially cracked: context flavous, unchanging, rather thin, sweet ; tubes long, 
flavous to melleous or greenish-yellow, much depressed near the stem, mouths subcircular, 
the extreme edges usually distinctly orange or testaceous: spores oblong-fusiform, smooth, 
yellowish-green, 12-14 « 4-5 u: stipe subfusiform, flavous, distinctly punctate with reddish 
dots nearly to the apex, solid, yellow or dark-purplish within, 4-8 cm. long, 8-12 mn. 
thick. 
TYPE LOCALITY: Ellis, Massachusetts. 
HasitatT: Sandy soil in deciduous or mixed woods. 
DISTRIBUTION : Massachusetts, New Jersey, Ohio, and Kentucky. 
DOUBTFUL SPECIES 
Boletus parvus Peck, Bull. Torrey Club 24: 145. 1897. Described from specimens 
collected by L. M. Underwood in grassy woods near Auburn, Alabama. Types not found. 
5. ROSTKOVITES P. Karst. Rev. Myc. 3°: 16. 1881. 
Hymenophore annual, terrestrial, stipitate; surface viscid, glabrous or hirtellous: con- 
text fleshy, yellowish; tubes adnate, angular, yellow, not covered with a veil, exuding 
viscid drops which blacken on drying : spores oblong-ellipsoid, smooth, yellowish-brown : 
stipe solid, glandular-dotted, exannulate, not reticulate. 
Type species, Rostkovites granulatus (L.) P. Karst. 
Pileus glabrous or nearly so. 
Pileus brown when moist, yellowish on drying ; stem over8 mm. in diameter. 1. &. granulatus. 
Pileus yellow, often streaked with bright-red ; stem usnally slender, 8 mm. 
or less in diameter. 2. R. subaureus. 
Pileus adorned with conspicuous tufts of hairs, 3. R. hirtellus, 
1. Rostkovites granulatus (L.) P. Karst. Rev. Myc. 3°: 16. 1881. 
Boletus granulatus I,. Sp. Pl. 1177. 1753. 
Boletus lactifluus With. Brit. Pl. ed. 2.3: 415. 1792. 
Boletus circinans Pers. Neues Mag. Bot. 1: 107. 1794. 
Leccinum lactifiuum S. F. Gray, Nat. Arr. Brit. Pl. 1: 647. 1821. 
Boletus collintius Peck, Ann. Rep. N. Y. State Cab. 23: 129. 1872. 
Boletus albus Peck, Ann. Rep. N. Y. State Cab. 23: 130. 1872. (Type from New York.) 
Boletus viscosus Frost, Bull. Buffalo Soc. Nat. Sci. 2: 101. 1874. (Type from Vermont.) Not &. 
viscosus Venturi. 
Boletus punctipes Peck, Ann. Rep. N. Y. State Mus. 32: 32. 1880. (Type from New York.) 
Boletus brevipes Peck, Ann. Rep. N. Y. State Mus. 38: 110. 1885. 
Viscipellis granulaia Quél, Ench. Fung. 156. 1886. 
Ixocomus granulaius Quél. Fl. Myc. Fr. 412. 1888, 
Pileus subhemispheric to nearly plane, gregarious, rarely cespitose or solitary, 4-10 
cm. broad, 1-1.5 cm. thick; surface very viscid, with easily separable cuticle, very variable 
in color, usually pinkish-gray to reddish-brown, fading to yellowish, often obscurely 
spotted, especially at the center; margin sterile, projecting, incurved and somewhat ap- 
pendiculate when young: context thick, compact, elastic, pale-yellow next to the tubes, 
white above, unchanging when wounded, taste mild, somewhat mucilaginous ; tubes short, 
