THE BRYOPHYTES OF CORNWALL
AND THE ISLES OF SCILLY


by
David T. Holyoak
     
Introduction -  Hornworts -  Liverworts -  Mosses -  Coastal influences -  Analysis -  Bibliography -  Acknowledgements -  Links -  CISFBR
A B C D F G H J K L M N O P R S T Layout notes Abbreviations People's initials Herbaria Full Text PDF

Liverworts

(MARCHANTIOPHYTA)
Adelanthus
decipiens


Anastrophyllum
minutum


Aneura
mirabilis


Aneura
pinguis


Aphanolejeunea
microscopica


Barbilophozia
attenuata


Barbilophozia
barbata


Barbilophozia
floerkei


Bazzania
trilobata


Blasia
pusilla


Blepharostoma
trichophyllum


Calypogeia
arguta


Calypogeia
fissa


Calypogeia
muelleriana


Calypogeia
sphagnicola


Cephalozia
bicuspidata


Cephalozia
catenulata


Cephalozia
connivens


Cephalozia
leucantha


Cephalozia
lunulifolia


Cephalozia
macrostachya


Cephalozia
macrostachya
var. macrostachya


Cephalozia
pleniceps


Cephaloziella
calyculata


Cephaloziella
dentata


Cephaloziella
divaricata


Cephaloziella
hampeana


Cephaloziella
integerrima


Cephaloziella
massalongi


Cephaloziella
massalongi s. l.


Cephaloziella
nicholsonii


Cephaloziella
rubella


Cephaloziella
spinigera


Cephaloziella
stellulifera


Cephaloziella
turneri


Chiloscyphus
pallescens


Chiloscyphus
polyanthos


Cladopodiella
fluitans


Cladopodiella
francisci


Cololejeunea
minutissima


Colura
calyptrifolia


Conocephalum
conicum s. l.


Conocephalum
conicum s. str.


Diplophyllum
albicans


Diplophyllum
obtusifolium


Douinia
ovata


Drepanolejeunea
hamatifolia


Dumortiera
hirsuta


Fossombronia
angulosa


Fossombronia
caespitiformis


Fossombronia
foveolata


Fossombronia
incurva


Fossombronia
loitlesbergeri


Fossombronia
maritima


Fossombronia
mittenii


Fossombronia
pusilla


Fossombronia
wondraczekii


Frullania
dilatata


Frullania
fragilifolia


Frullania
microphylla
var. microphylla


Frullania
tamarisci


Frullania
teneriffae


Gongylanthus
ericetorum


Gymnocolea
inflata


Gymnomitrion
concinnatum


Gymnomitrion
obtusum


Haplomitrium
hookeri


Harpalejeunea
molleri


Harpanthus
scutatus


Jamesoniella
autumnalis


Jamesoniella
undulifolia


Jubula
hutchinsiae


Jungermannia
atrovirens


Jungermannia
pumila


Kurzia
pauciflora


Kurzia
sylvatica


Kurzia
trichoclados


Leiocolea
badensis


Leiocolea
turbinata


Lejeunea
cavifolia


Lejeunea
lamacerina


Lejeunea
mandonii


Lejeunea
patens


Lepidozia
cupressina


Lepidozia
reptans


Lophocolea
bidentata


Lophocolea
bispinosa


Lophocolea
fragrans


Lophocolea
heterophylla


Lophocolea
semiteres


Lophozia
bicrenata


Lophozia
excisa


Lophozia
incisa


Lophozia
longiflora


Lophozia
sudetica


Lophozia
ventricosa


Lunularia
cruciata


Marchantia
polymorpha


Marchantia
polymorpha
subsp.
polymorpha


Marchantia
polymorpha
subsp.
ruderalis


Marchesinia
mackaii


Marsupella
emarginata
var. emarginata


Marsupella
funckii


Marsupella
profunda


Marsupella
sprucei


Metzgeria
conjugata


Metzgeria
consanguinea


Metzgeria
furcata


Metzgeria
violacea


Microlejeunea
ulicina


Moerckia
flotoviana


Mylia
anomala


Mylia
taylorii


Nardia
compressa


Nardia
geoscyphus


Nardia
scalaris


Nowellia
curvifolia


Odontoschisma
denudatum


Odontoschisma
sphagni


Pellia
endiviifolia


Pellia
epiphylla


Pellia
neesiana


Petalophyllum
ralfsii


Plagiochila
asplenioides


Plagiochila
bifaria


Plagiochila
exigua


Plagiochila
porelloides


Plagiochila
punctata


Plagiochila
spinulosa


Porella
arboris-vitae


Porella
cordaeana


Porella
obtusata


Porella
pinnata


Porella
platyphylla


Ptilidium
ciliare


Radula
complanata


Radula
lindenbergiana


Reboulia
hemisphaerica


Riccardia
chamedryfolia


Riccardia
incurvata


Riccardia
latifrons


Riccardia
multifida


Riccardia
palmata


Riccia
beyrichiana


Riccia
bifurca


Riccia
cavernosa


Riccia
ciliata


Riccia
crozalsii


Riccia
crystallina


Riccia
glauca


Riccia
huebeneriana


Riccia
michelii
var. ciliaris


Riccia
nigrella


Riccia
rhenana


Riccia
sorocarpa


Riccia
subbifurca


Saccogyna
viticulosa


Scapania
compacta


Scapania
curta


Scapania
gracilis


Scapania
irrigua


Scapania
nemorea


Scapania
paludicola


Scapania
scandica


Scapania
subalpina


Scapania
uliginosa


Scapania
umbrosa


Scapania
undulata


Solenostoma
caespiticium


Solenostoma
gracillimum


Solenostoma
hyalinum


Solenostoma
obovatum


Solenostoma
sphaerocarpum


Solenostoma
subellipticum


Southbya
tophacea


Sphaerocarpos
michelii


Sphaerocarpos
texanus


Targionia
hypophylla


Telaranea
europaea


Telaranea
murphyae


Trichocolea
tomentella


Tritomaria
exsectiformis


Tritomaria
quinquedentata


Cephaloziella nicholsonii Douin NR:VU 12

(syn. C. massalongoi auct. non (Spruce) Müll.Frib. pro parte). Temperate Suboceanic element.


 

 

 

*1: (Paton 1984: 5, Corley 1985: 21).

*2: Caradon Hill, 1962, JAP (Paton 1984: 5, Corley 1985: 21).

           

See notes under preceding species. C. nicholsonii has most of its localities in Britain and Ireland, with a record from Germany. Most of the British sites are in Cornwall.

 

Distinction between this species and C. massalongi relies mainly on its larger size, most easily assessed from the stem cortical cells, and the larger and often irregularly shaped gemmae (Paton 1999: 152). However, shaded material is often unidentifiable or only rather tentatively identifiable from the large size and frequent irregularity of the gemmae.

 

Forming mats, mainly pure, often locally dominant. On thin soil and deeper soil or clay in areas of old copper-mine spoil, usually where evidently very copper rich and most plentiful in damp places. Also on walls built from or retaining mine spoil, where it grows mainly on 'soil' in crevices but sometimes spreads over rocks around crevices. On vertical to horizontal substrates. Occurs in open unshaded situations and where very sheltered and partly shaded. Large patches occur on flat open ground near an exposed cliff top at Botallack, but near Minions and elsewhere it grows luxuriantly on sheltered and partly shaded banks of a small stream. It apparently persists for many years when its sites become heavily shaded by encroaching scrub or saplings, although identification becomes difficult if not hopeless with plants growing in shade.

 

Although differences in habitat preferences from C. massalongi have been reported, none appear consistent so that list of associates could mainly serve for both species. Those recorded include Cephaloziella stellulifera, Dicranella varia, Pohlia annotina, Scopelophila cataractae. Also overgrowing ground-litter of decaying grasses or mosses on old copper mine spoil, on partly bare stony ground at edge of path near old mines, on steep sandy-silt alluvium of bank near Red River (presumably containing copper). See below for analyses of its substrates at Cornish sites.

 

Foliar gemmae usually (always?) present, often abundant, especially in shaded plants which often have few leaves, none of them properly formed, but masses of gemmae. Perianths only occasionally present: very immature 2, 12, well grown 1, 4. Capsules not seen.

 

Chemical analyses of its substrates show it can tolerate high to very high levels of Cu at Cornish localities, whereas levels of Pb and Zn are not exceptionally high at these sites. All substrates investigated were acidic.

 

Analyses of substrates from localities in Cornwall (metal concentrations given as µg/g dry weight):

 

LOCALITY (N samples)  Cu                           Pb                           Zn                           pH          Source  

Long Lane, vc1 (2)              161-464                 42-139                   7-10                        6.0          Clements (1996)

Tuckingmill, vc1 (1)            179                         3                              20                           6.0          Clements (1996)

Dolcoath Road, vc1 (6)      1678-3450            56-90                     240-723                 5.2-6.8   Rouen (2000)

Gilbert's Coombe, vc1 (4)  2024-3512            82-288                   245-485                 5.1-5.4   Rouen (2000)

W. Bassett, vc1 (4)              1316-3039            35-65                     31-78                     5.1-5.9   Rouen (2000)

 

 Photomicrograph Photomicrograph of gemmae.