Atlas Of Ferns Of The British Isles
Atlas Of Ferns Of The British Isles Atlas Of Ferns Of The British Isles
98 MARSILEACEAE 0 7 6 0 29.1 PILULARIA GLOBULIFERA Pillwort 0 100 1 1 Kilometres Mikm 5 -V \ 0 CHANNEL ISLANDS PLOT TED ON UTM GRID 9 8 9 0 wv 29.1 Pilularia globulifera L. 100 9 8 0 1 2 3 4 1 00 2 A sub-Atlantic species spread throughout Britain and Ireland but generally decreasing because of drainage of marginal lands and ponds which formerly contained the species. Similarly declining in Europe where it is regarded as an endangered species. Unless sporocarps ("pills") and circinnately coiled leaves are present P.globulifera may be overlooked as a young Juncus plant. 1 0 e 0 0 vm, 0 0 88 0 o 00 00 0 C. 60 00 0 9 8 75 HX HW 0 0 0 80 0 0 00 o o o o o lio o 1 2 3 4 5 6 N2 4 6 t;$ 0 6 5 4 3 2 0
AZOLLACEAE 99 0 5 0 8 30.1 AZOLLA FILICULOIDES Water Fern 0 100 Kilometres 0 100 CHANNEL ISLANDS Mdes 9 PLOT TED ON 0 wv UTM GRID 9 9 0 i3 8 2 ,47 6 6 3 9 8 8 0 N1 0 7 5 o 0 : 00 0 _. gee 1 2 3 4 5 6 30.1 Azolla filiculoides Lam. Regarded by most botanists as having been introduced into Europe from tropical America. It is certainly well-established here and shows signs of increasing in Britain (cf. map 27/1, p.15, in the 1962 edition of the Atlas of the British Flora, with the above). With the present trend in eutrophication of ponds and inland waters it is difficult to explain this increase. Possibly the increased drainage operations have created more ditches and similar open water in drainage channels which have in turn become colonised. It suddenly, and inexplicably, disappears, often to return some five or ten years later. N2 4 6 0 0 5 4 3 2 0
- 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 and 94: ASPIDIACEAE 89 0 7 5 0 0 27.6 DRYOP
- Page 95 and 96: ASPIDIACEAE 91 27.8 DRYOPTERIS 1 2
- 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: BLECHNACEAE 97 0 6 5 0 28.1 BLECHNU
- Page 105: Equisetum arvense 19, 20 x fluviati
98 MARSILEACEAE<br />
0<br />
7<br />
6<br />
0<br />
29.1<br />
PILULARIA<br />
GLOBULIFERA<br />
Pillwort<br />
0 100<br />
1 1<br />
Kilometres<br />
Mikm<br />
5 -V \<br />
0<br />
CHANNEL ISLANDS<br />
PLOT TED ON<br />
UTM GRID<br />
9<br />
8 9 0<br />
wv<br />
29.1 Pilularia globulifera L.<br />
100<br />
9<br />
8<br />
0 1 2 3 4<br />
1 00<br />
2<br />
A sub-Atlantic species spread throughout Britain and Ireland<br />
but generally decreasing because of drainage of marginal lands<br />
and ponds which formerly contained the species. Similarly<br />
declining in Europe where it is regarded as an endangered<br />
species. Unless sporocarps ("pills") and circinnately coiled<br />
leaves are present P.globulifera may be overlooked as a young<br />
Juncus plant.<br />
1<br />
0<br />
e<br />
0<br />
0 vm,<br />
0 0<br />
88 0<br />
o<br />
00<br />
00 0<br />
C. 60<br />
00<br />
0<br />
9<br />
8<br />
75<br />
HX<br />
HW<br />
0<br />
0 0 80<br />
0<br />
0<br />
00<br />
o o<br />
o o o<br />
lio<br />
o<br />
1 2 3 4 5 6<br />
N2<br />
4<br />
6<br />
t;$<br />
0<br />
6<br />
5<br />
4<br />
3<br />
2<br />
0
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