European Red List of Vascular Plants
- Melanie Bilz, Shelagh P. Kell, Nigel Maxted and Richard V. Lansdown -
Luxembourg: Publications Office of the European Union, 2011
IUCN Global Species Programme
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Citation: Bilz, M., Kell,
S.P., Maxted, N. and Lansdown, R.V. 2011. European Red List of Vascular
Plants. Luxembourg:
Publications Office of the European Union.
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Picture credits on cover
page: Narcissus nevadensis is endemic to Spain where it has a very restricted
distribution. The
species is listed as
Endangered and is threatened by modifications to watercourses and
overgrazing. © Juan Enrique
Gómez.
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Luxembourg: Publications
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ISBN 978-92-79-20199-8
doi:10.2779/8515
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Medicinal Plants of
the Guianas (Guyana,
Surinam, French Guiana)
Species
richness and phytogeography of the Bryophyte flora of the Guianas - Tropical
Bryology 2. 117-126, 1990
S.R. Gradstein, D. Montfoort
and J.H.C. Cornelissen
Institute of Systematic
Botany, Heidelberglaan 2, Utrecht, The Netherlands
*Studies on the flora of the
Guianas 46. Dedicated to Jeanne Florschütz-de Waard on the occasion of her 65th
birthday.
Abstract. The Guianas (French
Guiana, Suriname, Guyana) are probably one of the
last areas of the world
covered largely by virgin lowland rain forest. Species diversity
of epiphytic bryophytes was
investigated in dry evergreen forest and mixed forest using
mountaineering techniques to
ascend into the canopy. The results indicate that the
lowland rain forest is richer
in species than previously believed due to neglect of the
canopy flora, which may hold
more than 50% of the local species. The mixed forest
holds the richest flora and
on one single forest tree up to 67 bryophyte species were
found (50 on average); 28
trees yielded 154 species. A species/area curve indicates that
epiphytic bryophyte species
are usually commonly distributed in the forest and a few
trees may yield much of the
local flora.
A recent checklist of the
Guianas includes over 600 species of bryophytes: 375
Hepaticae and 234 Musci. As
the region lacks in altitude (except on Mt. Roraima) the
general character of the
bryophyte flora of the Guianas is typically lowland neotropical.
Over 80% of the species are
rather widespread in tropical America (Amazonian species
included), and the remaining
are Guayana Highlands, northern Amazonian or Caribbean
elements. Endemism is very
low: 2.5 %.
