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specialized and low competitive chasmophyte closely bound to the limestone rock. It has

adapted on one hand to the specific microclimate determined by the exposure of the

niche, the composition of the rock, the presence of rock .fissures and on the other - to pot

holes with unknown depth which ensure the necessary humidity and ventilation.

Taking into consideration the data of Brownsey (1976) tor the vertical distribution

Asplenium lepidum

the new locality is unique with its elevation of 180 m a.s.l. The

place itself is the western section of a limestone rocky ring 7-8 m high located

southwards from the village of Muselievo. Similar rocky niches are not numerous on the

Nikopol plateau. The largest one is an entrance of a cave in the locality Nan in Kamak but

the plant was not found there,

The locality is in the immediate vicinity of a quarry which is a direct threat to the

plant. Quite probably, the fern has disappeared from the adjacent niche, 20 m away,

which has been recently destroyed.

The rocky ring shelters a unique petrophtlous flora represented by several rare

species known from one or two localities in the country such as

Dianthus nardiformis

Janкa,

Stachys arenariaeformis

R о иу ,

Nepeta parviflora

L.,

Celtis glahrata

S tev . ex

Planch,,

GonioHmon lataricum

(L.) B o iss. They all have high conservation importance

and arc included in The Red Data Book of Bulgaria or in Supplement 3 of The Law of

Biological Diversity. A. number of steppe elements with a restricted distribution in the

country are also found in this area -

Gypsophilaglomeraia

P a ll, ex B ieb .,

Astragalus

austriacus

jacq .,

Dianthus pseudoarmerta

B ieb.,

Iris pwnila

L.,

Cohhicum turcicum

Janka,

Scutellaria orientalis

L. subsp.

pinnaiifida

(R eichenb .) Endmondson,

Cephct!aria uralensis

(Murr.) Roem . et Sc hu It.,

Jurinea consanguinea

DC. subsp.

arachnoidea

(Bunge) Koz. (Цонев, 2002). The species

Dianthus nardiformis

is among

the 100 species in our flora included in The International List o f Rare and Threatened

Plants with category “rare'’ (W alter, G ille t (eds), 1998). The plant is listed also in the

Supplements of the Bern Convention.

All species mentioned above are found in habitats of European conservation

importance (Supplement 1 o f Directive 92/43 o fEEC )-6 2 4 0 Subpannonic steppes, 6250

Pannonic loess steppes, 8210 Calcareous rocky slopes with chasmophytic vegetation.

The locality Kamaka is included in NATURA 2000 place BG 247 Nikopol plateau, with

European importance for the preservation of species and habitats following Directives

92/43 and 79/409 of EEC.

Urgent measures are needed to declare the new locality о

i'Asplenium lepidum

part of a new protected territory with a specific flora.

REFERENCES

Davis, P.

(ed.). 1965. Genus

.'isplenium

L. Flora of Turkey and Aegean Island, 1: 48-52,

Greuter, IV., Burdet, H., GXong.

1984. Med-Checklist, 1:9-13, Conservatoire et Jardin Bot., Vilje de Geneve.

Jaias,J.,J.Suominen.

1972. Atlas Florae Enropaeae Distribution of vascular plants in Europe. 1. Helsinki:

Suonialaisen Kirkallisuudcn Kirjapaino Oy.

Tytin, T.

(ed.), 1964-1996, Flora Europaea. Cambridge Univ. Press.

m iter, K.S., IIJ. Gillet

(eds). 1998. 1997 1UCN Red List of Threatened Plants.

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