Mature spores purplish-brown.
a. Cortex consisting of very long convergent spines. Page [591].
b. Cortex composed of long slender convergent spines. Page [592].
c. Cortex composed of minute spinules. Page [594].
d. Cortex a furfuraceous persistent coat. Page [595].
e. Cortex a smooth, continuous layer, becoming areolate. Page [597].
II.—Olive-Spored Series.
Mature spores usually brownish-olivaceous.
A. Peridium Obovoid or Turbinate, the Subgleba Well Developed.
f. Cortex of long spines mingled with shorter ones, the former at length fall away, leaving a reticulate surface to the inner peridium. Page 598.