22 S THE AQUATIC QUILLWORTS. 



and no peripheral bast bundles. The sporangia are 

 broadly oblong or elliptical, and sparingly spotted. 

 The megaspores are 300 u to 450^ in diameter, marked 

 with small dots or warts which rarely run 

 together to form wrinkles. The micro- 

 spores are deep brown, 26^ to 31 long, 

 spinulose or rarely smooth. This species 

 is found in western Colorado, Utah, and 

 of California, and grows in streams as well 

 as in ponds. The form called Sonnet was 

 described from plants collected at Donner Lake, Cali- 

 fornia. 



In 1866, Bolander, after whom this species was named, 

 found at Mono Pass, on the eastern slope of the Sierra 

 Nevada, at an altitude of 7,000 feet, a peculiar form 

 which has since been known as Isoctes pygmcea. Its 

 resemblance to Isoetcs Bolanderi is so marked that there 

 should be no doubt of their being two forms of the same 

 species. The principal difference is that the plants of 

 Isoetes pygmcea have shorter leaves, seldom reaching an 

 inch long. The microspores also are less spinulose. To 

 the author this seems but a mere form of the better- 

 known species, and he would call it Isoctes Bolanderi 

 pyguuea. Its small size is undoubtedly due to its place 

 of growth in a cold mountain stream. The megaspores 

 are exactly like those of Isoctes Bolanderi, only a trifle 

 smaller. It has been collected but once, though often 

 searched for during the past half century. 



Isoetes Hieroglyp h ica . 



From certain lakes in Maine have been collected 

 specimens of an Isoctes which, to judge from spores 

 alone, is distinct from all others. This has recently been 



