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KMID : 0380319700050000101
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Journal of Korean Research Institute for Better Living
1970 Volume.5 No. 0 p.101 ~ p.115
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Limestone Flora of Todam, Province Chung Buk in South Korea
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Abstract
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Todam is a limestome area and is located at the northern part of the province of Chung Buk in South Korea. There are many outcroppings of limestone near a small stream in the vicnity of small cultivated farm lands.
We investigated the vascular plants of this area in 1969. The flora show 247 entries (species & varieties) and 76 families as per the following list. principall large families are as Compositae (28 species) and Leguminosae(26 species).
The diagnostic species in the flora are as follows:
Selaginella invense(S.W)Spring, Biota oriantalis Endlicher, Neillia uekii Nakai, Lespedeza maximowiczii Schneider var. elongatus Nakai, Spiraea obtusa Nakai, Spiraea media Schneid.,Buxus koreana Nakai, Diathron linifolium Turczaninow, Scutellaria baicalensis George,Abelia coreana Nakai, Chryanthemum zawadskii Herb. ssp. latlobum(2n=36) Chrysanthemum zawadskii Herb. ssp. acutilobum (2n=54) Chrysantemum zawadskii Herb.ssp. latilobum Xacutilobum (2n=45)
Most of the species seem to like to grow on limestone fields.
The species, Diathron linifolium Turcz. was reported from northern China in the Yalu river area of Mt. paektosan. Paesumably the Todam area is the southern-most limit of the distribution of Diathron linifolium Turcz.in Korea. Biota orientalis Endlicher was reported from northen China and also from this area. The taxa Diathron, Biota, Chrysan themum and Scutellaria are significant dontinental asiatic relic elements in this flora.
Chrysantemum zawadskii Herb ssp. latilobum grows abundantly in this area where the elevation is relativel high, while the taxa Chrysanthemum zawadskii Herb. ssp. acutilobum grows lower elevation. The places of lower elevation are the sandy and humus river side at the foot of Mt. Sambong in the small limited area. A presumable hybrid between the two taxa of the Chrysanthemum was found at the overlap zone of the taxa. The hybrid shows intermediate gross morphology and a chromosome number between the two taxa(Fig)
The taxa Rhododendron mucronulatum and R. yezoense are not growing at this area except near the temple of Todam Sambong which is located not far from the Sambong mountain.
The taxus Castanea also was not found at this limestone area and outcropping of lime stones, but the taxus grows in cultivating fields near the villages.
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