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Cephaloziella Uncinata Schust. in SpitsbergenAuthor(s): Alan C. CrundwellSource: Lindbergia, Vol. 4, No. 3/4 (1978), pp. 297-298Published by: Oikos Editorial OfficeStable URL: http://www.jstor.org/stable/20149301 .

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Lindbergia 4: 297-298

Cephaloziella uncinata Schust. in Spitsbergen

Alan C. Crundwell Department of Botany, University of Glasgow,

Glasgow G12 8QQ, Scotland.

Abstract. The Greenland Cephaloziella uncinata is reported from Spitsbergen. Spitsber gen records of C. subdentata probably all refer to this species.

Pe3K)Me. Co IIInHn?epreHa coo?maeTca o rpemiaHACKO? Cephaloziella uncinata.

PerHCTpanHH Ha IIInnu?epreHe C. subdentata BepOHTHO Bee othochtch k AaHHOMy

BHfly.

Among bryophytes I collected in Spitsbergen in 1954 were four specimens of a Cephalo

ziella that puzzled me. I named them provi

sionally C. subdentata Warnst., but was not

happy about the identification and put them on one side. On reading the description of the

new C. uncinata Schust. from Greenland

(Schuster and Damsholt 1974) I realised that

my plants belonged to this species. Dr. Dams

holt has very kindly confirmed the identifica tions. The specimens were collected on and

between hummocks in Cassiope tetragona

heath, with Empetrum hermaphroditum

locally co-dominant, between Moskushamn

and Advent City, Adventfjorden, 11-15

August 1954 (GL). It seemed possible that others might have

made the same mistake. Cephaloziella sub

dentata was reported by Arnell and M?rtens

son (1959) from five localities in Kongsfjord (Kings's Bay), where it was stated to be ?not

rare?. The material, kindly loaned from

Uppsala (UPS), consists of six specimens. None is C. subdentata, four are definitely C.

uncinata and the two remaining ones almost

certainly belong to this species but are too

poor for definite identification. The Uppsala material also includes one specimen labelled

C. subdentata from Longyearbyen, S. Arnell

and O. M?rtensson, 6.8.1956. This too is C.

uncinata.

The only other Spitsbergen record of C. subdentata is one by Hadac (1946) under its

20 Lindbergia 4:3-4

synonym C. striatula C. Jens. This appears in a

list of lowland species (those found only at altitudes not exceeding 250 m) from the ?Sassen Quarter?, the area between Sassen

fjorden and Adventfjorden. No further infor mation about this find has been published. My

locality for C. uncinata is in the ?Sassen

Quarter? and it is probable that Hadac's

record is based on this species. C. uncinata may be distinguished from C.

subdentata by the less roughened cuticle and

by the less deeply bilobed leaves, with the lobes wider at the base (5-10 cells wide as op

posed to 2-6) and with longly pointed tips, terminating in 1-2 elongated incurved celles.

The bracts are fused with each other and with the bracteole instead of being almost free and

are less sharply serrate. The cells at the mouth

of the perianth are longer. Probably more

closely related to C. uncinata, though superfi

cially less like it, is C. ?rctica. This, however,

has the leaves and bracts entire or subentire,

the leaf lobe tips never strongly elongated and the cells of the perianth mouth much shorter.

Plants of C. ?rctica usually have a vinous red

colouration, which is uncommon in C. unci

nata.

Arnell and M?rtensson said of ?C. subden

tata? at Kong?ijorden: ?Found on various

substrata, such as dead Dicrana or Paludella,

but also intermingled among living bryophytes such as Aulacomnium palustre, Mnium rugi cum and Timmia austr?aca.? The Cassiope

297

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Alan C. Crundwell

heath where the Adventfjorden specimens were growing was on Cretaceous calciferous

sandstone, with Dry as-dominated scree slopes above. The bryophytes most closely associ

ated with Cephaloziella uncinata were Ho

malothecium nitens, Sphagnum squarrosum,

Drepanocladus uncinatus, Timmia austr?aca, Mnium rugicum and Cephalozia pleniceps. In

west Greenland Schuster and Damsholt re

ported it as ?frequently occurring on damp, basalt cliffs, associated with mesophytic cal

ciphiles?. In Spitsbergen, as in Greenland, it is

evidently characteristic of habitats too basic to

support the calcifuge C. subdentata.

C. subdentata is a plant of bogs from the

deciduous forest region to the low arctic. The

West Greenland records of Schuster and

Damsholt probably the northernmost reliable ones, extend only to 69?53'N. It is not a plant of the high arctic and the revision of the Spits bergen material of Arnell and M?rtensson

removes an anomaly from its recorded distri

bution. C. uncinata on the other hand is

clearly a member of the ?high-arctic bryo

phyte element? in the sense of Steere (1965).

298

Its occurrence in the European arctic and its

presence in West Greenland as far south as

69?15'N. suggest that it may well occur in

northern Scandinavia. While there is no

reason to suppose that any of the published Scandinavian records of C. subdentata is based

on C. uncinata it would be worthwhile to look for the latter species in suitable localities.

Literature

Arnell, S. & O. M?rtensson. 1959. A contribution to the knowledge of the bryophyte flora of W.

Spitsbergen, and Kongsfjorden (King's Bay, 79?N.) in particular.

- Ark. Bot. 4: 105-164.

Hadac, E. 1946. The plant-communities of Sassen

Quarter, Vestspitsbergen. - Stud. Bot. Cechos

lov. 7: 127-164.

Schuster, R. M. & K. Damsholt. 1974. The Hepati cae of West Greenland from ca. 66?N. to 72?N. -

Meddel. Gr?nland 199(1): 1-373.

Steere, W. C. 1965. The boreal bryophyte flora as affected by Quaternary glaciation.

- Pages

485-495 in H. E. Wright, Jr., and D. G. Frey (Editors), The Quaternary of the United States.

Princeton Univ. Press.

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