182 KANSAS ACADEEIT OF SCIENCE. 



EXPLANATION OF PLATES. 



NOTE.— All measurements In the plates are one-third that given in the expla- 

 nation. 



PLATE I. 



(a) Weisia viridula Brid. var. stenocarpa MuelL, x 25. (b) Part of the peri- 

 stome showing teeth in pairs, x 500. (c) Spore showing papillous surface, 

 X 500. (d) Cells of the leaf at apex, (e) Cells of base of leaf, (f) Comal 

 leaf much enlarged, (g) Male flower showing antheridia and paraphyses, and 

 perigonial leaves, (h) Tip of leaf, showing the incurved edges, (i) Anthe- 

 rjdium greatly enlarged, (j) A dry plant of Weisia viridula Brid., x 2. (k) 

 Capsule showing the peristome. (1) Peristome many times magnified, with 

 two spores, (m) A leaf, x 20. (n) Cells at apex of leaf, (o) Cells at base of 

 leaf. 



PLATE II. 



(a) Plant of Dicranella varia Schimp., with fruit, (b) Dry capsule more 

 enlarged, showing the curved beak of the operculum, (c) Spores equivalent to 

 27 mmm. (d)Bifid tooth with a part of the edge of the capsule, (e) Tip of leaf, 

 showing the cells, (f) Leaf enlarged considerably, (g) Basal cells of the leaf. 



PLATE III. 



(a) Dicranum scoparium Hedw. from a New York specimen, x 5. (b) 

 Capsule with operculum, dry, x 5. (c) A part of a male plant showing anthe- 

 ridia in the axils of the leaves, (d) Leaf greatly magnified, (e) Basal cells 

 of leaf, (f) Apical cells, (g) Two trifid teeth with spores, (h) Spores equiva- 

 lent to 18 mmm. x 500. (i) Antheridium. 



PLATE IV. 



(a) Fissidens bryoides Hedw., from Switzerland, x 5. (b) Capsule and peri- 

 stome, dry, showing constriction under the mouth, (c) Tip of branch more 

 enlarged, (d) Perichaetial leaf enlarged, showing leaf cells, (e) Basal cells, 

 (f) Cells at apex, (g) Ordinary branch leaf, much enlarged, showing cells and 

 dorsal lamina, (h) Basal cells, (i) Apical cells and projecting costa. (j) 

 Cross section near the base of leaf, showing the dorsal lamina and both halves 

 of the true leaf, (k) Part of the peristome, showing one pair of teeth and the 

 base of another. (1) Spore diameter, 10-14 mmm. (m) Fissidens obtusifolius 

 Wils., Kansas, x 4. (n) leaf, (o) Capsule, (p) Spores. 



