@article{oai:mie-u.repo.nii.ac.jp:00014613, author = {Fukuda, Tomoko and 福田, 知子}, journal = {三重大学教養教育院研究紀要, Bulletin of the college of liberal arts and sciences, Mie University}, month = {Mar}, note = {application/pdf, Herbarium studies and field surveys were conducted to investigate the morphology and growth conditions of Micranthes fusca. On the basis of inflorescence hairs as a marker to distinguish variety, the boundary between var. fusca and var. kikubuki seems to pass around the central part of Yamagata prefecture of Japan. The flower’s petal color was mostly dark red. In southern E. Hokkaido, Aomori, and Kyushu, however, greenish white petals were found. The result of chromosome count from 23 localities was 2n = (ca.) 30 except for Kunashir of the Kuril Islands (2n = 30, 45, 60) and Shizukuishi, Iwate (2n = ca.45). Micranthes fusca is often found in the lowlands of Hokkaido and in the high mountains of central Honshu region, but it also grows in the mountains of Kinki and Kyushu regions. Warmth Index (WI) of each locality ranged from 11.9° to 87.4°, covering vegetation zones from subalpine meadow to the deciduous broad-leaved forest. Though high WI values were expected for Kinki and Kyushu regions, similar values were also found in other areas in Honshu in most cases. However, extremely high values of WI = 79.1°, 87.4°were found in only some populations in Kyushu, which should be the focus of further studies., 日本列島を中心に分布するエゾクロクモソウの形態と生育条件を調べるため、標本・実地調査を行った。変種の指標となる花序の毛(腺毛、普通毛、無毛)を調べた所、山形県の月山に腺毛・普通毛の個体が両方観察されたため、変種のエゾクロクモソウ・クロクモソウの境界は山形中部周辺を通るとみられる。花色(暗赤色、淡赤色、緑白色)は、千島、東北南部、本州中央高地には暗赤色の個体が多く、緑白色の個体はエゾクロクモソウ・クロクモソウの両変種にわたって、道東南部、青森、九州などにみられた。染色体数は過去の結果も含め23 地点で調査し、千島(2n = 30, 45, 60)、岩手雫石(2n = ca.45)を除き2n = 30 (ca.30) であった。 種としてのエゾクロクモソウは北海道の針葉樹林下や本州中部の高山に多く見られ、冷涼な気候を好むと考えられる一方、近畿・九州の山地にも分布し、生育条件に関心が持たれる。各生育地の暖かさの指数(WI)を求めた所、WI 値は11.9° ~87.4° まで大きく変化し、生育する植生帯も亜高山草原から落葉広葉樹林帯まで、広範囲にわたっていた。近畿、九州では高いWI 値が予想されたが、多くの場合、同様な値は本州の他の生育地でもみられた。ただし、WI=79.1°, 87.4°という高い値は九州の一部の集団のみで見られたため、今後、これらの集団に注目した検討が必要である。}, pages = {13--23}, title = {Morphology, chromosome numbers and growth condition of Micranthes fusca (Maxim.) S.Akiyama et H.Ohba (Saxifragaceae)}, volume = {6}, year = {2021}, yomi = {フクダ, トモコ} }