Atlas Of Ferns Of The British Isles
Atlas Of Ferns Of The British Isles Atlas Of Ferns Of The British Isles
90 0 7 6 5 0 27.7 DRYOPTERIS CRISTATA Crested Buckler - fern 0 kdometrm MiIe 9 CHANNEL ISLANDS PLOT TED ON 0 wv UTM GRID 1 100 100 9 8 0 9 0 . 1;1) 2 1 2 co% ./7 27.7 Dryopteris cristata (L.) A.Gray 1 2 A northern continental species at one time frequent in the east of England and N.W. Midlands. Now, because of changes in land-use and increasing drainage of acid mires, it is almost restricted to East Anglia where it is locally frequent in the Norfolk Broads area, v.c. 27. Lack of regular fen cutting allows tussock growth of Molinia, Carex elata and Sphagnum spp. upon which establishment of D.cristata depends and the 3 4 9 8 N1 0 7 5 HX HW N2 ASPIDIACEAE decrease of such mowing may be encouraging this species to regain its status. There has been recently a widespread increase of acid (base-poor) plant communities (including Sphagnum Jimbriatum, S.magellanicum, S.palustre, S.squarrosum and S.subnitens) in the fens of the Norfolk Broads, the ecological reason for which is not fully understood. It is in these communities that D.cristata becomes well established. 4 6 Ct, trP 0
ASPIDIACEAE 91 27.8 DRYOPTERIS 1 2 3 4 CARTHUSIANA 0.' Narrow Buckler - fern CHANNEL l'ED ON ISLANDS 0 PLOT — wv UTM GRID L.) 9 9 8 .- O 100 i I 0 Kilometres 100 .. Mica O o 9 — -. roe : MI N1 8 ILA; 00 0 Th o 0 0 0 GO 2 o : S . : 10°8 -, Moo 6 6 * 4 ..8.6 se se se e IINI : i 080 0:4141 GO o * 5 0 0 41. 411 4908 5 o 0 5 ..> 0 0 ne 0000 S. O 1 411 00 04041 410 n o o 6 40 of _ o 00 0 4141 4 o l..0 tiii : 41000841:4, 99 f V 0001 4,1110.44 00_4141 *ON 41, o olIND is o ..0 i s ei0 " ... . 0 y0 Goo e o 9 0 0440 f_ 8 NM 0 MD 1 00 Oil 80 ell 4,0 0410041 74 5 r :00 N2 :e0S0 al: %et 0 0 081* :0 : * 4616114 411 00 Ten: 6 *sumo 41mo 41414 012:41 0: lia. ' gm O: 411:4114::0 MU 041 'II gee" 0451 41410 0 0 1 2 3 4 5 6 lo3* 27.8 Dryopteris carthusiana (Vill.) FI.P.Fuchs (D.lanceolatocristata (Hoffm.) Alston; D.spinulosa Watt) A northern continental species widespread in the British Isles and a common fern in some wet woods of N.W. Scotland, where it often grows with D.expansa. The hybrid with the latter species has not so far been found in Britain and should be searched for in such mixed populations; it has the upright rhizome of D.expansa but with an intermediate frond (shape, cutting and marginal teeth): It is however extremely difficult to distinguish from D. x deweveri without cytological con firmation. 2 1
- Page 43 and 44: POLYPODIACEAE 0 6 5 0 16.1 POLYPODI
- Page 45 and 46: POLYPODIACEAE 41 0 7 8 0 16.2 x1 PO
- Page 47 and 48: POLYPODIACEAE 0 6 5 0 8 16.3x1 POLY
- Page 49 and 50: DENNSTAEDTIACEAE 0 0 17.1 PTERI DI
- Page 51 and 52: THELYPTERIDACEAE 47 0 6 5 0 19.1 PH
- Page 53 and 54: ASPLENIACEAE 0 6 0 21.1 ASPLENIUM S
- Page 55 and 56: ASPLENIACEAE 0 6 5 0 21.2 ASPLENIUM
- Page 57 and 58: ASPLENIACEAE 53 0 7 6 5 0 21.3 ASPL
- Page 59 and 60: ASPLENIACEAE 55 0 0 6 5 21.5 ASPLEN
- Page 61 and 62: ASPLENIACEAE 57 0 21.7 ASPLENIUM TR
- Page 63 and 64: ASPLENIACEAE 59 0 0 5 21.7b ASPLENI
- Page 65 and 66: ASPLENIACEAE 61 0 0 7 6 5 8 21.8 AS
- Page 67 and 68: ASPLENIACEAE 63 0 7 6 5 0 8 21.9 x
- Page 69 and 70: ASPLENIACEAE 0 1 2 3 o o 21.10x 7a
- Page 71 and 72: ATHYRIACEAE 67 0 1 2 3 4 0 0 22.1 A
- Page 73 and 74: ATHYRIACEAE 69 0 5 22.3 ATHYRIUM FL
- Page 75 and 76: ATHYRIACEAE 71 0 6 5 23.2 GYMNOCARP
- Page 77 and 78: ATHYRIACEAE 73 0 6 5 0 8 24.2 CYSTO
- Page 79 and 80: ATHYRIACEAE 0 6 5 0 25.1 WOODSIA IL
- Page 81 and 82: ASPIDIACEAE 0 0 6 5 26.1 POLYSTICHU
- Page 83 and 84: ASPIDIACEAE 79 0 6 5 0 26.2 x3 POLY
- Page 85 and 86: ASPIDIACEAE 0 7 0 27.1 DRYOPTERIS O
- Page 87 and 88: ASPIDIACEAE 0 6 0 8 27.2 DRYOPTERIS
- Page 89 and 90: ASPIDIACEAE 85 7 6 5 4 0 8 27.2x 3
- Page 91 and 92: ASPIDIACEAE 0 6 5 0 27.4 DRYOPTERIS
- Page 93: ASPIDIACEAE 89 0 7 5 0 0 27.6 DRYOP
- Page 97 and 98: ASPIDIACEAE 93 6 5 0 27.9 DRYOPTERI
- Page 99 and 100: ASPIDIACEAE 95 0 7 6 5 27. 9 x 10 D
- Page 101 and 102: BLECHNACEAE 97 0 6 5 0 28.1 BLECHNU
- Page 103 and 104: AZOLLACEAE 99 0 5 0 8 30.1 AZOLLA F
- Page 105: Equisetum arvense 19, 20 x fluviati
ASPIDIACEAE 91<br />
27.8<br />
DRYOPTERIS<br />
1 2 3 4<br />
CARTHUSIANA 0.'<br />
Narrow<br />
Buckler - fern<br />
CHANNEL l'ED ON ISLANDS 0<br />
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27.8 Dryopteris carthusiana (Vill.) FI.P.Fuchs<br />
(D.lanceolatocristata (Hoffm.) Alston;<br />
D.spinulosa Watt)<br />
A northern continental species widespread in the <strong>British</strong> <strong>Isles</strong><br />
and a common fern in some wet woods of N.W. Scotland,<br />
where it often grows with D.expansa. <strong>The</strong> hybrid with the latter<br />
species has not so far been found in Britain and should be<br />
searched for in such mixed populations; it has the upright<br />
rhizome of D.expansa but with an intermediate frond (shape,<br />
cutting and marginal teeth): It is however extremely difficult<br />
to distinguish from D. x deweveri without cytological<br />
con firmation.<br />
2<br />
1
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