indigo. One-third natural size,
showing gills.]

This is one of our most striking plants. No one can fail to recognize
it, because of the deep indigo blue that pervades the whole plant. I
have found it in only one place, near what is known as the Lone-Tree
Hill near Chillicothe. I have found it there on several different
occasions.

The pileus is from three to five inches broad, the very young plants
seem to be umbilicate with the margin strongly incurved, then depressed
or funnel-shaped; as the plant ages the margin is elevated and sometimes
waved. The entire plant is indigo blue, and the surface of the cap has
a silvery-gray appearance through which the indigo color is seen. The
surface of the cap is marked with a series of concentric zones of darker
shade, as will be seen in Figure 130 especially on the margin; sometimes
spotted, becoming paler and less distinctly zonate with age or in
drying.

The gills are crowded, indigo blue, becoming yellowish and sometimes
greenish, with age.

The stem is one to two inches long, short, nearly equal, hollow, often
spotted with blue, colored like the pileus.

It is edible but rather coarse. Found in open woods July and August.

_Lactarius regalis. Pk._

[Illustration: Figure 132.--Lactarius regalis. Natural size. Caps white,
tinged with yellow.]

Regalis means regal; so named from its large size. The pileus is four to
six inches broad, convex, deeply depressed in the center; viscid when
moist; often corrugated on the margin; white, tinged with yellow.

The gills are close, decurrent, whitish, some of them forked at the
base.

The stem is two to three inches long and one inch thick, short, equal,
hollow. The taste is acrid and the milk sparse, white, quickly changing
to sulphur-yellow. The spores are .0003 of an inch in diameter. _Peck._

This is frequently a very large plant, resembling in appearance L.
piperatus but easily recognized because of its viscid cap and its spare
milk changing to yellow, as in L. chrysorrhaeus. It grows on the ground
in the woods, in August and September. I find it here chiefly on the
hillsides. The specimens in Figure 132 were found in Michigan and
photographed by Dr. Fischer.

_Lactarius scrobiculatus. Fr._

THE SPOTTED-STEMMED LACTARIUS.

[Illustration: _Photo by C. G. Lloyd._

Figure 133.--Lactarius scrobiculatus. Natural size. Caps reddish-yellow,
zoned. Margin very much incurved, stem pitted.]

Scrobiculatus is from _scr