DISTRIBUTION IN TIME AKD SPACE. 



Lycopodium dendroideum. 

 clavatum. 

 complanatum. 

 Selaginella apus. 

 Isoetes lacustris. 



Tuckermani. Local, 

 echinospora, var. Braunii. 



var. robusta. Local, 

 var. Boottii. 



Isoetes echinospora, var. muricata. 



Local. 



saccharata. Local, 

 riparia. 

 Engelmanni. 

 var. gracilis. 

 var. valida. 

 melanopoda. 

 Butleri. Rare. 



OCCIDENTAL. 



(Species marked * are confined to California ; those marked t are found only in 

 Oregon.) 



Polypodium falcatum. 



Californicum.* 



Scouleri. 



Gymnogramme triangularis. 

 Notholaena Newberryi. 



cretacea.* 



tenera. 



Adiantum emarginatum. 

 Pteris aquilina, var. lanuginosa. 

 Cheilanthes Calif crnica.* 



viscida.* 



Cooperae.* 



gracillima. 



Parishii.* 



fibrillosa.* 



Clevelandii.* 

 Pellasa Breweri. 



andromedaefolia.* 



brachyptera. 



ornithopus.* 



densa. 



Bridgesii.* 

 Lomaria spicant. 

 Woodwardia radicans. 



Phegopteris alpestris. 

 Aspidium munitum. 



mohrioides.* 



aculeatum.* 



var. Californicum.* 

 var. angulare.* 



Nevadense.* 



rigidum, var. argutum. 

 Woodsia scopulina. 



Oregana. 



Marsilia vestita. 

 Pilularia Americana. 

 Equisetum telmateia. 



robustum. 

 Selaginella Oregana. 



Douglasii. 

 Isoetes pygmaea.* 



Bolanderi. 



Howellii.f 



nuda.t 



Nuttallii. 



Suksdorfii.t 



ARIZONIAN. 



(Species marked * are found in our region only in Arizona; those marked t are 



Texan.) 



Polypodium thysanolepis.* 

 Gymnogramme Ehrenbergiana. 

 Notholaena sinuata. 

 ferruginea. 



Notholaena Parryi. 

 Aschenborniana.* 

 Candida. 

 Hookeri. 



