[Vor. 1 
116 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
The species is distinguished from the following one by the 
much thinner pileus and the marked tendency to appear sub- 
stipitate. Otherwise it scarcely differs, and intermediate forms 
are found that are difficult to place satisfactorily It is usually 
considered to be a southern species, but Hard reports finding it 
in Ohio. His specimens were determined by Peck. 
45. P. cinnabarinus Jacq. ex Fries, Syst. Myc. 1:371. 1821. 
Boletus cinnabarinus Jacq. Fl. Austr. 4:2. 1770. 
Plants annual, rarely reviving, sessile or effused-reflexed; 
pileus dimidiate or reniform, 2-6 x 2-10 x 0.5-2 cm., tough 
and leathery when fresh, more rigid when dry, orange-colored 
to cinnabar-red, often becoming paler or almost white with age, 
compactly tomentose or glabrous, usually azonate, margin 
thin or thick, acute; context red or yellowish red, floccose- 
fibrous to soft-corky, always zonate, 0.4-1.5 em. thick; tubes 
1-4 mm. long, the mouths cinnabar-red, circular then angular 
and sometimes somewhat sinuous, averaging 2-4 to а mm.; 
spores white, smooth, oblong, 2-2.5 x 4.5-5.5 и. 
On dead wood of all kinds. September to December. Com- 
mon. 
The prevailing deep red color of both pileus and hymenium 
separates this species from all others of the genus except P. 
sanguineus Fries, from which this species differs only in being 
thicker and in having the context more strongly zoned. Р. 
cinnabarinus is à northern species and much more common in 
Ohio than is P. sanguineus. 
46. P. resinosus Schrad. ex Fries, Syst. Myc. 1:361. 1821. 
Boletus resinosus Schrad. Spic. Fl. Ger. 171. 1794. 
Plants annual, sessile or decurrent, more or less imbricate; 
pileus dimidiate, 5-15 x 7-25 x 0.8-2.5 cm., somewhat fleshy 
and full of water when young, firmer when mature and soft- 
corky on drying, velvety-tomentose to glabrous, sulcate or with 
a few broad, colored zones, margin at first thick and somewhat 
obtuse, becoming thinner and acute; context pallid to light 
brown, fleshy and watery when young, soft-corky when dry, 
0.5-2 ст. thick; tubes 1-6 mm. long, the mouths white to 
pallid, changing to a darker color on drying, circular to angular, 
averaging 4-6 to а mm.; spores white, smooth, cylindrical, 
curved, 1.2-2 x 5-6.3 y. 
