228 THE AQUATIC QUILLWORTS. 



and no peripheral bast bundles. The sporangia are 

 broadly oblong or elliptical, and sparingly spotted. 

 The megaspores are 300" 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 

 Megasporeof California, and grows in streams as well 

 isoetesBoianderi. ^^ j^^ ponds. The form Called Sotinei 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 Isoetes 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 pygmcsa 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 Isoetes Bolanderi 

 pygjiicBa. Its small size is undoubtedly due to its place 

 of growth in a cold mountain stream. The megaspores 

 are exactly like those of Isoetes Bolanderi, only a trifle 

 smaller. It has been collected but once, though often 

 searched for during the past half century. 



Isoetes Hieroglyphica. 



From certain lakes in Maine have been collected 

 specimens of an Isoetes which, to judge from spores 

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



