| 单词 | buttonweed |
| 释义 | > as lemmasbuttonweed buttonweed n. (a) (North American) any of several herbaceous plants of (or formerly included in) the related genera Spermacoce and Diodia (family Rubiaceae), which are native to tropical and subtropical areas of the Americas and frequently regarded as noxious weeds, having small white or pinkish-purple flowers with four lobes and elliptical, pointed leaves (also with distinguishing word); (b) common knapweed, Centaurea nigra (rare); (c) (North American) velvetleaf, Abutilon theophrasti. ΘΚΠ the world > plants > particular plants > plants perceived as weeds or harmful plants > weed > [noun] > knapweed ironhardOE matfellon?a1300 hardhawa1400 bull-weeda1450 club-weeda1500 knapweed1530 crop-weed1597 hardhead1610 horse-knop1691 horse-knob1724 buttonweed1760 knobweed1785 ironweed1808 knotweed1827 ironhead1863 1760 J. Lee Introd. Bot. Table i. 265 Spermacoce. Button Weed. 1807 ‘A. McDonald’ Compl. Dict. Pract. Gardening at Spermacoce The species cultivated are: 1. S. tenuior, Slender Button-weed; 2. S. verticillata, Whorl-flowered Button-weed. 1872 Rep. Commissioner Agric. (U.S. Dept. Agric.) 471 Indian mallow, (Abutilon Avacennæ), better known among the farmers of the Western States as ‘stamp weed’, ‘velvet leaf’, ‘butter print’, ‘button weed’ &c. 1873 W. B. Hemsley Handbk. Hardy Trees i. 265 C[entaurea] nigra, Knapweed or Buttonweed, is a familiar native example. 1925 Amer. Botanist Apr. 56 Our only species of Spermococe..is sometimes called ‘smooth button-weed’ to distinguish it from species of Diodia which are by inference, as well as in fact, ‘rough button-weeds’... The word ‘buttonweed’..refers to the small rounded clusters of flowers or fruits. 1949 Davenport (Iowa) Democrat & Leader 10 July 45 (caption) Button weeds are growing from five to six feet high in the corn field. 2006 N. Mac Coitir Irish Wild Plants 272 Common Knapweed... Alternative Names: Bachelor's Buttons,..Black Knapweed, Buttonweed (Kerry). 2014 @ThisBarbara 20 June in twitter.com (O.E.D. Archive) All I really want to do today is pull the Virginia buttonweed out of my front lawn. < as lemmas |
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