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Hansford T. Shacklette
28
C. O. Erlanson
19
Louis H. Jordal
18
Carl O. Grassl
16
Ruth B. (Alford) MacFarlane
13
William Palmer
13
Allison W. Cusick
11
Faurie
11
Philip Dowell
10
W. Eyerdam
8
W. J. Cody
8
Walter N. Koelz
8
David Wagner
7
Stanwyn G. Shelter
7
Ernest Rouleau
6
Roux, Jacobus P.
6
Willard W. Eggleston
6
E. H. Eames
5
Gilmore W. Soule
5
Harvey E. Ballard, Jr
5
Stanwyn G. Shetler
5
Andreas Gygax
4
George E. Nichols
4
George H. Conklin
4
Gerhart Wagner
4
James Montgomery
4
Joan H. Wilce
4
Konrad Lauber
4
Paul DeBenedictis
4
Robert S. Sigafoos
4
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Polypodiales
Plantae
440
Polypodiopsida
440
Dryopteridaceae
121
Dryopteris
107
Cystopteridaceae
105
Woodsiaceae
83
Woodsia
81
Cystopteris
72
Athyriaceae
42
Gymnocarpium
34
Athyrium
33
Tracheophyta
28
Thelypteridaceae
25
Aspleniaceae
23
Biodiversity
23
Taxonomy
23
Asplenium
21
Pteridaceae
17
Phegopteris
16
Polypodiaceae
13
Polypodium
13
Polystichum
13
Cryptogramma
12
Dennstaedtiaceae
7
Pteridium
7
Pseudathyrium
6
Onocleaceae
5
Rosaceae
5
Thelypteris
5
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Canada
158
Greenland
48
Newfoundland
37
Northwest Territories
36
Yukon
19
Attu Island
16
Cockburn
16
Cockburn Island
16
Arctic
12
Norway
10
Indian
9
Nunavut
9
Thunder Bay
9
Breton Island
8
Great Bear Lake
8
Orleans
8
Qeqqata
8
Mansfield
7
McTavish Arm
7
Eldorado
6
Mo i Rana
6
Saint-Paul
6
Eagle Island
5
Massacre Bay
5
Moser
5
Perseverance
5
Plurdalen
5
West Bay
5
Yellowknife
5
Elliott
4
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Alaska
93
Newfoundland
55
Woodsia glabella
51
Greenland
48
Northwest Territories
36
Yukon
19
Attu
16
Cockburn Island
16
Asplenium adulterinum
15
Sakhalin
14
Arctic
12
Beaver Creek
12
north slope
12
Gymnocarpium continentale
11
Ketchikan
11
Sondre Stromfjord
10
Alaska North Slope
9
Nunavut
9
Breton Island
8
Great Bear Lake
8
Kamchatka
8
Nordland
8
Qeqqata
8
glacier
8
Antarc*
7
Antarctica
7
Kuskokwim
7
McTavish Arm
7
Rana
7
karelia*
7
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