ASPLENIUM, CAMPTOSORUS (see ASPLENIACEAE) 
ATHYRIUM, CYSTOPTERIS, DRYOPTERIS, 
MATTEUCCIA, ONOCLEA, POLYSTICHUM, 
WOODSIA (see DRYOPTERIDACEAE) 
DENNSTAEDTIA, PTERIDIUM (see 
DENNSTAEDTIACEAE) 
POLYPODIUM, polypody 
Polypodium polypodioides (L.) Watt, resurrection fern, gray 
ody, p. 26 
var. michauxianum Weath. 
P. virginianum L., common polypody [S: P. vulgare L. var. 
virginianum (L.) A. A. Eaton] (Shivas, 1961), p. 26 
THELYPTERIS (see THELYPTERIDACEAE) 
WOODWARDIA (see BLECHNACEAE) 
SALVINIACEAE, floating fern family 
AZOLLA, mosquito fern 
Azolla mexicana C. Presl, mosquito fern, water velvet, p. 17 
SALVINIA, floating fern 
¢Salvinia natans (L.) All., floating fern, water spangles, p. 17 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
