|Three of the rarest species of
plants in Denmark
can be found on a limestone slope in a side valley to the Lindenborg
river valley in Himmerland.
Orchis ustulata (right picture) has now only 2 sites i
Denmark both in Northern Jutland.
On the site in Himmerland the plant is threathened to be overgrown by
higher vegetation because this small species is totally dependant of
grazing of its habitat. Another threat is the great number of visitors
that come to take pictures of the rare orchid. The eager photographers
forget to look where they walk and many small individuals of
Orchis ustulata are trampled down. The area is now protected and
under restoration, and the number of plants has slowly been rising in
the recent years.
|Also Crepis praemorsa
(left picture) can be found on the limestone slope. This species has
only a few sites back in Denmark.
Other rare species on the slope are Cineraria integrifolia
which is only found in Northern Jutland and the grass Koeleria
A number of species typical for calcerous grassland is also present as
Arabis hirsuta, Campanula persicifolia, Helianthemum
nummularium and Pulsatilla vulgaris - a species allmost
only seen in Jutland. Of other more common lime-loving species there is
Plantago media, Cirsium acaule, Briza
media, Galium boreale, Avenula pratensis and
Due to the low nitrogen level in the soil a number of species usually
seen on poor, sandy soils are present as Scorzonera humilis,
Hieracium pilosella, Thymus serpyllum and Juniperus
botanical rarity on the site is Cypripedium calceolus.
C. calceolus has long been known from the Rold Skov
(Forest of Rold) also in Himmerland as the only site in Denmark. Here
the population is surrounded by a number of high fences to avoid
digging up of this rare orchid. There is now established a
parking-place and signs are leading to the fences. In recent years the
population is declining propably due to overgrowth of the plants and
To a great surprise a new established population of C. calceolus
was discovered in the 1980'ies on the limestone slope. Here the
pollination is very good and the population is spreading. The only
problem is trampling of the young plants by the many visitors.
For many years ago C. calceolus most likely has grown on Mon
but today the species is only known from two sites in Denmark.