THE DEVELOPMENT OF SOME SPECIES OF AGARICS 
12. Hartig, R. Wichtige Krankheiten der Waldbaume, usw. 12-42, ph. i, 2. 1874. 
13. HoJffmann, H. Die Pollinarien und Spermatien von Agaricus. Bot. Zeit. 14: 
137-148, 153-163, pl' 5- 1856. 
14. . Beitrage zur Entwickelungsgeschichte und Anatomic der Agaricinen. 
Bot. Zeit. 18: 389-395, 397-404. pis. 13, 14. i860. 
15. . Icones Analyticae Fungorum, Abbildungen und Beschreibungen von 
Pilzen mit besonderer Riicksicht auf Anatomie und Entwickelungsgeschichte. 
1861. 
DESCRIPTION OF PLATES VI-XI 
The following photomicrographs were made by the author with a Bausch and 
Lomb vertical camera and Zeiss lenses, and with a horizontal Zeiss camera. 
Plate VI 
Figs. 1-17. Omphalia chrysophylla. 
Figs. i-io. Median longitudinal sections, showing the general habit and 
development of the basidiocarp. X 24. 
Fig. i. Basidiocarp primordium composed of a homogeneous weft of slender 
threads. The general direction of the hyphae is parallel with the axis of the young 
fruit body. X 24. 
Fig. 2. The first differentiation of the basidiocarp is the flaring out of the 
hyphae at the apical end which is the region of the pileus primordium. The portion 
of the basidiocarp below this differentiation is the stipe primordium. X 24. 
Figs. 3-5. Sections showing the gradual development of the pileus. The 
hyphae grow up and outward with a slight tendency to epinasty. They also show 
the gradual growth that takes place in the stipe which causes it to become even. 
X 24. 
Fig. 6. Shows the further development of the pileus and stipe. The former 
develops by a radial centrifugal growth. The marginal hyphae curve down and 
form an annular groove on whose surface is the hymenophore primordium. The 
latter structure is differentiated as a more dense staining area in the angle between 
the margin of the pileus and stipe. X 24. 
Fig. 7. Represents a further development of these structures. The hymeno- 
phore primordium has differentiated into the palisade layer. X 24. 
Figs. 8-10. These sections show the continued development of the basidio- 
carp. The palisade layer has been replaced by the lamellae. The stipe and pileus 
has developed by means of branching of its elements and interstitial growth. X 24. 
Fig. II. A tangential section near the stipe, showing the palisade layer. X 24. 
Fig. 12. A tangential section very near the stipe which shows the down- 
growing salients of the palisade layer, the rudiments of the lamellae. X 24. 
Figs. 13-17. Tangential sections, showing the development of the lamellae 
from the first appearance of the salients to the well-formed lamellae. X 24. 
Fig. 16. Is a tangential section through the margin of the pileus, showing the 
involute edge beneath the gills. X 24. 
