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单词 polytrichum
释义

Polytrichumn.

Brit. /pəˈlɪtrɪkəm/, U.S. /pəˈlɪtrᵻkəm/
Origin: A borrowing from Latin. Etymon: Latin Polytrichum.
Etymology: < post-classical Latin Polytrichum (1685 or earlier), apparently < polytrichon n., after Latin nouns in -um.
A genus of mosses of the family Polytrichaceae, whose members have calyptrae covered with fine hairs; (also polytrichum) a moss of this genus, esp. Polytrichum commune, the golden maidenhair or hair moss (also polytrichum moss).Valid publication of the genus name: J. Hedwig Species muscorum (1801) 88.
ΚΠ
1754 New & Compl. Dict. Arts & Sci. III. 2491/2 Polytrichum, in botany, a genus of mosses, consisting of stalks furnished with leaves, and producing separate pedicles supporting capsules.
1831 W. Patrick Pop. Descr. Plants Lanarkshire Pref. 20 Tracts of land..yielding chiefly Heather..and Moss-fogs, such as Sphagnums, Bryums, Polytrichums.
1856 Ladies' Repository 16 400/2 Their use of the moss in this way may have arisen from the example of the bear.., who, in common with other wild animals, prepares his winter bed of polytrichum.
1879 Bull. Torrey Bot. Club 6 363 These ferns grow in the open land,..sometimes in beds of Lycopodium complanatum and Polytrichum moss.
1935 Ecology 16 546 Polytrichum moss, Polytrichum sp.
1968 E. V. Watson Brit. Mosses & Liverworts (ed. 2) 130 All species of Polytrichum are alike in that their apparently scattered and little-branched erect stems spring..from a complicated underground rhizoid system.
1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) v. 383/2 Polytrichum, a common moss in temperate woodlands, typifies moss species in which the entire plant is either male or female.
This is a new entry (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1754
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