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Hans H. Blom:

A Revision of the Schistidium apocarpum complex in Norway and Sweden

1996. 334 pages, 115 figures, 14x22cm, 600 g
Language: English

(Bryophytorum Bibliotheca, Band 49)

ISBN 978-3-443-62021-9, paperback, price: 72.00 €

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Keywords

bryophytesNorwaySwedenHerbariumfield workBryophytenNorwegenSchwedenHerbariumFeldforschung

Contents

Synopsis top ↑

From extensive field studies, including the use of mixed stands, the Schistidium apocarpum complex, comprising the small-spored species of the genus, is found to be very rich in taxa in Scandinavia. The taxa are defined by a combination of gametophytic and sporophytic characters. The most important characters are found in the cell structure of the leaf lamina, the recurvature of the leaf margin, hair-point structure, urn shape, exothecial cell pattern, and in the peristome. Character states are classified as plesiotypic or apotypic. Structural reduction, particularly in the sporophyte, seems to be a major trend of evolution. 31 species, 2 subspecies and 2 varieties occur in Scandinavia. Aspects of the ecology and phytogeography of the Schistidium apocarpum complex and its taxa are studied. Distribution maps for Scandinavia and the northern hemisphere are provided for each taxon. The taxa are placed in well-known phytogeographical elements.

Contents top ↑


Abstract 5
Preface 8
Acknowledgements 8
INTRODUCTION
Material and methods 9
Herbarium material 9
Field work 9
Microscopy and illustrations 9
Treatment of taxa 9
Nomenclature 11
TAXONOMY
Schistidiumnom.cons 12
Conspectus of groups and subgroups 13
Key to species and subspecific taxa 14
Apocarpum group 33
Apocarpum subgroup 33
Schistidium apocarpum (Hedw.) Bruch & Schimp 34
Schistidium flexipile (Lindb. ex Broth.) Roth 43
Schistidium grandirete Blom sp. nov 50
Schistidium lancifolium (Kindb.) Blom comb. et stat. nov 55
Schistidium trichodon (Brid.) Poelt var. trichodon 61
Schistidium trichodon var. nutans Blom var. nov 70
Strictum subgroup 74
Schistidium boreale Poelt 75
Schistidium confusumBlom sp. nov 82
Schistidium frisvollianum Blom sp. nov 87
Schistidium papillosum Culm 93
Schistidium poeltii Blom sp. nov 101
Schistidium pruinosum (Wile. ex Schimp.) Roth 106
Schistidium strictum (Turn.) Loeske ex Mart 112
Umbrosum subgroup 119
Schistidium pulchrum Blom sp. nov 119
Schistidium umbrosum (Zett.) Blom comb. et stat. nov 125
Robustum group 131
Schistidium bryhnii Hag 131
Schistidium dupretii (Ther.) W. A. Weber 136
Schistidium recurvum Blom sp. nov 144
Schistidium robustum (Nees & Hornsch.) Blom comb. nov 149
Schistidium scandicum Blom sp. nov 157
Schistidium subjulaceum Blom sp. nov 161
Confertum group 166
Schistidium confertum (Funck) Bruch & Schimp 167
Schistidiumflaccidum (De Not.) Ochyra 175
Schistidiumfrigidum Blomsp. nov. var.frigidum 181
Schistidium frigidum var. havaasii Blom var. nov 18g
Schistidium venetum Blom sp. nov 192
Tenerum group 197
Schistidium tenerum (Zett.) Nyh 197
Atrofuscum group 203
Schistidium atrofuscum (Schimp.) Limpr 205
Schistidium brunnescens Limpr. subsp. brunnescens 212
Schistidium brunnescens subsp. griseum (Nees & Hornsch.) Blom
comb. et stat. nov 218
Schistidium crassipilum Blom sp. nov 224
Schistidium elegantulum Blom sp. nov. subsp. elegantulum 233
Schistidium elegantulum subsp. wilsonii Blom subsp. nov 239
Schistidium singarense (Schiffn.) Laz 244
Schistidium submuticum Zickendr. ex Blom sp. nov. subsp. submuticum 250
Schistidium submuticum subsp. arcticum Blom subsp. nov 255
Names excluded from the Schistidium apocarpum complex 260
Names without seen type material 263
DISCUSSION
Historical review 269
General ecology and associated species 273
Distribution, geographical elements 279
Taxonomy 286
Taxonomic concepts; the mixed stand method 286
Environmentally induced variation, modifications 288
Taxonomic characters 291
Species groups 315
Concluding remarks 319
References 320
Index of names 327