7. Dryopteris Adans. Aspidium Sw. Schrad. Part 8
Description
This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol1", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
7. Dryopteris Adans. Aspidium Sw. Schrad. Part 8
17. Dryopteris Robertiana (Hoffm.) C. Chr. Scented Oak-Fern
Fig. 53
Polypodium Robertianum Hoffm. Deutschl. Fl. 2:
[add. 4]. 1795. Phegopteris Robertiana A. Br.; Aschers. Fl. Brand. 2:
198. 1859. Polypodium calcareum Sm. Fl. Brit. 1117. 1804. Phegopteris calcarea Fee, Gen. Fil. 243. 1850-52.
Rootstock slender, creeping, branched. Stipes slender, straw-colored, 6'-13' long; blades 6'-8' long, s'~7' broad, copiously glandular, suberect, triangular-ovate; basal pinnae largest, 3'-4 1/2' long, unequally deltoid-ovate, long-stalked, 2-pinnatifid; second pair of pinnae distant, short-stalked or sessile, pinnate or 2-pinnatifid, deltoid-oblong; succeeding pinnae sessile, narrower, mostly pinnatifid; segments close, oblong to elongate-oblong, the margins subentire to crenate-dentate, reflexed; sori near the margin, non-indusiate, numerous.
On shaded limestone, Labrador to Alaska. New Brunswick and Iowa. Rare and local Also in Europe.
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