—75— 



diagnostic, and nothing seems reasonable but to make it a sub- 

 species of hiemale. 



In one form or another this species is found around the world 

 in the North Temperate regions, ranging from Mexico, 20 

 degrees north, to the Arctic Circle. 



KEY TO THE VARIETIES. 



I. Ridges with bands of silex — Robusta. 



A. Sheaths long, green, ampliated. 



Stems stout, 1 to 4 feet, 1 to 4 lines in diameter, .intermedium 



Stems slender, 1 foot high Texanum 



Stems weak and herbaceous, 3 to 12 inches high, ]/ 2 to 1 

 line in diameter herbaeeum 



B. Sheaths tight, mostly with black and white rings. 

 Stems 3 to 15 inches tall, sheaths fuscous, teeth persistent, 



lower joints tumid pumilum 



Stems with spiciferous branches, grooves with rosulae. 



Suksdorfi 



Stems 3 feet high, stomata in 1 to 3 rows Drummondii 



Stems 1 to 3 feet high, sheaths longer than broad, teeth often 

 carried upon the apex of the stem as a pagoda-like ter- 

 mination. Appearance of hiemale, character of robus- 



tum afline 



Sheaths as broad as long, teeth more persistent, stems 3 to 

 6 feet high robustum 



II. Ridges with two rows of tubercles — Hiemalia. 



A. Without rosulae in grooves. European hiemale 



B. With rosulae in the grooves. 



Stout, teeth deciduous Calif ornieum 



Smaller, teeth rigid, persistent Doellii 



CAMPBELL EASTER WATERS. 



The botanist whose portrait appears in this number is well 

 known to the members of the Fern Chapter as the second presi- 

 dent of the Chapter, and as a constant contributor to the pages 

 of the Bulletin. He is a native of Baltimore county. Maryland, 

 where he was born September 14, 1872. He graduated at Johns 

 Hopkins University in 1895. having been "Hopkins Scholar" 



