— 124 — 



consin and Washington northward and in the 

 mountains of Utah, Colorado and California; 

 also in Northern and central Europe, Asia and 

 in the Himalyas. — Aspidium lonchitis Sw. 

 Dryopteris lonchitis Kuntze. 



189. Polystichum munitum ( Kaulf . ) Common ; on 



stony slopes. California and Arizona to Alas- 

 ka. — Aspidium munitum Kaulf; Dryopteris 

 munita Kze. 



The form imbricans D. C. Eaton with 

 close-set pinnae, the form inciso-serratum D. 

 C. Eaton with deeply cut pinnae and f» flabel- 

 latum A. A. Eaton with forked fronds may 

 be expected with the type. 



Pteris L. 



190. Pteris aquilina L. Bracken; Brake. Eagle 



Fern. Abundant in woodlands, pastures and 

 along roadsides. Throughout most of the 

 known world. The form crispa Wollaston is 

 reported from Massachusetts. — Pteridium aqili- 

 num (L.) 



191. Pteris aquilina pseudocaudatu Clute. 



Slender bracken. Common or abundant; in 

 sterile soil. Long Island to Texas mostly in 

 the coastal plain. Until recently confused with 

 Pteris caudata L. — Pteridium aquilinum pseu- 

 docaudatum Clute ; P. latisuscula Desv. ? 



192. Pteris aquilina pubescens Underw. Com- 



mon : in situations preferred by the type. Ari- 

 zona to British Columbia. — Pteris aquilina 

 lanuginosa Underw. 



193. Pteris caudata L. Somewhat rare; in open 



places. Southern Florida ; also nearly around 

 the world in the tropics. 



