This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
(August Wilhelm Dennstedt, early German botanist). Polypodiaceae. Hardy or greenhouse ferns of wide distribution, often referred to Dick-sonia but belonging to a different family from the tree ferns of the latter genus from the antarctic or southern hemisphere. Indusium inferior cup-shaped, open at top and adherent on outer side to a reflexed toothlet: leaves 2-3-pinnatifid, from erect or creeping rootstocks. Species about 30; of simple cultural requirements.
Moore (Dicksonia pilosiuscula, Willd.). Figs. 1239, 1240. Rootstock slender, creeping, underground: leaves light green, 1-2 1/2 ft. long, 5-9 in. wide, usually tri-pinnatifid, under surface minutely glandular, giving the dried leaves a somewhat pleasant fragrance; sori minute, on small, recurved teeth. Canada to Tenn. - Sometimes called hay-scented fern, and boulder fern. Likes light porous soil and semi-shaded places. Variable.
Smithii, Moore. Leaves thick, the under surface almost woolly, glandular, tripinnate; lower pinnae 9-12 in. long, 3-4 in. wide; sori 2-8 to each segment Philippines.
Moore. From the W. Indies, often 6-7 ft. high, with broad (2-4 ft.) leaves - Sometimes seen in cult, and is well worth a place in the trade.
L. M. Underwood.