WILD FLOWERS OF CALIFORNIA 159 



2151. Prickly shield-fern Polystichum aculeatum 



Shady canons of the Coast Ranges; Berkeley hills; hills near Los Gatos; 

 near Santa Cruz. 



2152. Bladder Fern Cystopteiris fragilis 



Common in damp, shady places in the Coast Ranges and the Sierra 

 Nevada. 



2153. Woodsia Woodsia scopulina 



In the Sierra Nevada; Mono Trail at 9,000 to 10,000 feet altitude: Mt. 

 Silliman; Kaweah Peak, Yosemite. 



2154. Woodsia Woodsia oregana 



High altitudes in the Sierra Nevada; Lassen County, San Bernardino 

 M ountains. 



CLUB MOSS FAMILY LYCOPODIACEAE 



2155. Lycopodium spp. 



To be looked for in cold, damp woods in mountains. 



SELAGINELLA FAMILY SELAGINELLEAE 



2156. Resurrection plant Selaginella rupestris 

 Sierras. 



2157. Quillwort Isoetes bolanderi 

 Ponds and shallow lakes. Sierras. 



2158. Isoetes pygmea 



Deeply submerged in running water. Sierras. 



2159. Isoetes braunii 



2160. Isoetes melanopa 

 Reported as from California. 



MARSILIACEAE 



2161. Marsilia Marsilia vestita 



Near Visalia. Leaflets broadly cuneate. In swamps which become dry in 

 summer. 



2162. Marsilia Marsilia quadrifolia 



In Wahtoke Lake, Fresno County. In water, the leaflets which resemble 

 those of oxalis, commonly floating on surface. Frequently cultivated. Intro- 

 duced probably from Europe. 



SALVINIACEAE 



2163. Ozolla Ozolla caroliniana 



Common in intramountane California. San Bernardino Valley, Owen's 

 Valley, near Visalia, and at Three Rivers. 



2164. Ozella Ozolla hedropidakum 

 Lakes in Fresno County, Wahtoke Lake. 



Floating plants of small size which appear like moss on the water's surface. 

 On close examination the leaves seem fern-like. They are deep bronze above and 

 sulphury below. A small and interesting family of plants without close affinity 

 to other groups. 



