The =pileus= is convex, becoming nearly plane, viscid or glutinous when moist, dull yellowish to reddish brown, sometimes with the color irregularly distributed in streaks. The flesh is whitish or dull yellowish. The =tube= surface is plane or convex, the tubes set squarely against the stem (adnate), while the tubes are small, with small, nearly rounded, or slightly angular mouths. The color of the tubes is yellowish or ochre colored, becoming darker in age, and sometimes nearly brown or quite dark. The =stem= is pale yellowish, reddish or brownish, and more or less covered with glandular dots, which when dry give a black dotted appearance to the stem. In the case of descriptions of _B. luteus_ the stem is said to be dotted only above the annulus, while the description of _B. subluteus_ gives the stem as dotted both above and below the annulus. The =spores= are yellowish brown or some shade of this color in mass, lighter yellowish brown under the microscope, fusiform or nearly so, and 7--10 × 2--4 µ. The =annulus= is very variable, sometimes collapsing as a narrow ring around the stem as in Fig. 173, from plants collected at Blowing Rock, N. C., September, 1899 (_B. subluteus_ Pk.), and sometimes appearing as a broad, free collar, as in Fig. 174. The veil is more or less gelatinous, and in an early stage of the plant may cover the stem as a sheath. The lower part of the stem is sometimes covered at maturity with the sheathing portion of the veil, the upper part only appearing as a ring. In this way, the lower part of the stem being covered, the glandular dots are not evident, while the stem is seen to be dotted above the annulus. But in many cases the veil slips off from the lower portion of the stem at an early stage, and then in its slimy condition collapses around the upper part of the stem, leaving the stem uncovered and showing the dots both above and below the ring (_B. subluteus_). [Illustration: PLATE 62, FIGURE 174.--Boletus luteus. Cap drab to hair-brown with streaks of the latter, viscid when moist, tubes tawny olive to walnut-brown, stem black dotted both above and below the broad, free annulus (natural size). Copyright.]