摘要:

AbstractSeven species are reported here for the first time for South Georgia. Two of these were already known from Tierra del Fuego,Acrolophozia fuegianaSchust. andMarsupella sprucei(Limpr.) H. Bern., butAcrolophozia sulcataHässel,Marsupella austrogeorgicaHässel, andMarsupella minutulaHässel are described as new. The additional two species which are described,Austrolembidium crassumHässel andGreeneothallus gemmiparusHässel, also required the creation of two new genera. The total number of liverwort species now known to be present on South Georgia is sixty-six.

ISSN:0373-6687    

DOI:10.1179/jbr.1980.11.1.107

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractBeing a synonym ofBryum nitensHook.,B. cruegeriHampe is not new to Africa. In addition to tubers, deciduous shoot tips and shoot fragments act as vegetative propagules.

ISSN:0373-6687    

DOI:10.1179/jbr.1980.11.1.129

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractGemmae found on the protonema ofBarbula trifariaare described. The protonemal gemmae of this species and ofGyroweisia tenuisandEucladium verticillatum, in addition to those recently reported inSchistostega pennata, seem to be adaptations for survival and propagation at low light intensities.

ISSN:0373-6687    

DOI:10.1179/jbr.1980.11.1.133

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractMorphological distinctions betweenThamnobryum alopecurumandT. angustifoliumaremaintained when the species are grown under standardized conditions, confirming the validity of the present taxonomic separation of the two species. The record from Madeira is erroneous, soT. angustifoliumretains its status as a British endemic.

ISSN:0373-6687    

DOI:10.1179/jbr.1980.11.1.139

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractRegeneration from detached leaves at 20°C in 12 h days was studied in six species. Of the four species ofPolytrichumand two ofPogonatumstudied, onlyPogonatum aloidesdid not regenerate from leaves. This result could be related to the fact that in nature only this species possesses persistent primary protonemata.Polytrichum commune, P. formosumandP. juniperinumdeveloped long, muchbranched secondary protonemata which produced buds at intervals.Pogonatum urnigerumdeveloped buds without an initial protonema, andPolytrichum piliferumshort, unbranched protonemal threads, each bearing a single terminal bud. In all cases regenerants arose from either the large cells at the bases of lamellae, or less often, basal cells of the lamellae themselves. InPogonatum urnigerumthe amount of regeneration tended to decrease from apex to base of leaf, while in thePolytrichumspecies the reverse occurred. No definite conclusions could be drawn with regard to the effect, if any, of leaf age on regeneration. Possibly the temperature experienced beforehand or some other seasonal factor, affects regeneration, but the question needs further investigation.

ISSN:0373-6687    

DOI:10.1179/jbr.1980.11.1.145

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

AbstractVolemitol inLophoeolea bidentataandPlagioehila spinulosa, volemitol and sedoheptulose inBazzania trierenataandLepidozia reptans, and mannitol inBarbilophozia floerkeiandSeapania undulataare photosynthetic products in addition to sucrose and fructans. Polyols are not primary assimilatory products inMylia taylori, Nardia sealaris, Saeeogyna vitieulosaorPorella platyphylla. It is concluded that neitherMylianorSaeeogynais closely related to the Plagiochilaceae/Lophocoleaceae complex and that chemotaxonomic investigation would aid the classification of the Jungermanniaceae s.l.

ISSN:0373-6687    

DOI:10.1179/jbr.1980.11.1.161

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1980.11.1.169

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1980.11.1.171

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1980.11.1.iii

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor