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Blandow's bogmoss (''Helodium blandowii''), also known as Blandow's feathermoss, is a rare plant in the Western U.S., including Oregon and California. It occurs all around the northern hemisphere in higher latitudes, and in some places is not as rare as in the Western U.S. == Technical description == *Plants yellow-green, in loose tufts: ascending even though pleurocarpous, regularly and closely pinnately branched, the branches all in one plane like a feather. *Stems 4–11 cm long, more or less erect (quite stiff when dry), densely clothed in unbranched (but lobed) green filamentous paraphyllia becoming brown below. *Branches unequal, simple, widely spaced on stem, about 1 cm long. *Stem leaves large, more or less triangular-ovate, shortly and slenderly acuminate, somewhat plicate (concave), appressed except at the tips, with paraphyllia emanating from the decurrent leaf bases; margins plane or often revolute, entire or irregularly serrulate or dentate in the middle and lower part of the leaf; costa extending beyond the middle, 1.3–1.8 × 0.7–1 mm. *Branch leaves small (about 0.8 mm long) and contorted when dry, broadly ovate-acuminate to ovate-lanceolate. Autoicous, the perigonia and perichaetia on the stems. *Seta 3–5 cm long, slender, reddish-brown. *Capsules rare; when present, smooth, oblong-cylindric, becoming strongly arcuate (curved) and cernuous (incurved), the short neck somewhat wrinkled, the urn 2½–3½ mm long, yellowish-brown becoming reddish-brown with age; operculum conic, pointed, to 0.8 mm long; annulus of 3 rows of deciduous cells; cilia 2–3, long, and more or less appendiculate. *Spores smooth, mature in August. *Calyptra cucullate.〔 〕〔 〕〔 〕〔 〕〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Helodium blandowii」の詳細全文を読む スポンサード リンク
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