(First upload on May 31 2016. Last on May 12 2023) [ 日本語 | English ]
Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily
HOME > Plant list (植物リスト) > Fern (シダ類) > Dryopteridaceae (オシダ科) > Dryopteris lacera
Dryopteris Adans. (オシダ)Oshida (オシダ, 雄羊歯), wood fernMemma (メンマ) Lifeform: semi-evergreen or semi-deciduous perennial fern Distribution: Manchuria - Korea - Japan (not in Kyushu) Habitat: mesic forest floor Chromosome number: n = 41 f. maackii (Milde) Tagawa (キレコミオシダ) Developmental leaf architecture was quantitatively described in terms of measurements of various parameters on leaf blade from different size of sporophytes in Dryopteris monticola, D. tokyoensis and a putative hybrid, D. kominatoensis in the natural site of Hokkaido, to compare the ontogenetic differentiation in foliage structure among allied ferns. The morphological stage of leaf and sporophyte was tentatively quantified by the number of midrib branches of the leaf (NV, number of veins), which exhibited a significant correlation to the leaf-shape complexity from a circle (DI = marginal length/2 × (π × square)1/2) of leaf blade. |
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[1/2] near a junglezym in Tomakomai Experimental Forest (ToEF) of HU on September 10 2009. [3] in Tsukiura Forest Park faced to Toya Lake on September 15 2015. [4] at a bakery in Ebetsu City close to Tsukigami Lake on October 8 2017. [5/6] along Horonai River in ToEF on June 10 2022. [7/8] along a valley in Horomi Path (幌見峠), Sapporo, on June 11 1985. [9] an epiphytic form near the 4th crater on Mount Usu on June 19 1985, taken by Ko. Ito.
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[1] an unidentified shoot, close to D. crassirhizoma, in Sandaohu (三道湖) wetland, northeastern China, on October 10 1989.