4 treff

Ferns and allied plants : with special reference to tropical America
Rolla M. Tryon , Alice F. Tryon ; habitat...
Bok Språk ikke angitt 1982
A revision of the American species of Notholaena
Tryon, Rolla M.
Bok Engelsk 1956
The ferns and fern allies of minnesota
by Rolla M. Tryon, Jr.; illustrated by Wi...
Bok Engelsk 1954
A preliminary check list of the flowering plants, ferns and fern allies of Minnesota
by John W. Moore and R.M. Tryon, Jr.
Bok Engelsk 1946