Podostemumn.

Brit.

/ˌpɒdə(ʊ)ˈstiːməm/, U.S.

/ˌpɑdoʊˈstiməm/

Forms: 1800s– Podostemon, 1800s– Podostemum. Also with lower-case initial.

Origin: A borrowing from Latin. Etymon: Latin Podostemum.

Etymology: < scientific Latin Podostemum ( A. Michaux Flora Boreali-Americana (1803) II. 164) < podo- podo- comb. form + ancient Greek στήμων warp, thread, taken in sense ‘stamen’ (see stamen n.); so called on account of the two stamens with filaments united for about half their length.In form podostemon after ancient Greek στήμων. N.E.D. (1907) gives the pronunciation (pǫdoˌstī·mǫ̆n) /pɒdəʊˈstiːmən/ for the form podostemon.

A genus of dicotyledonous aquatic plants (the type genus of the family Podostemaceae), comprising plants with highly modified, mosslike foliage and inconspicuous flowers, occurring in tropical regions and North America where they are confined to swiftly flowing rivers; also ( podostemon or podostemum) a plant of this genus.

ΘΚΠ

the world > plants > particular plants > plants and herbs > aquatic, marsh, and sea-shore plants > [noun] > thread-foot

river weed1832

Podostemum1836

podostemad1846

thread-foot1884

1836 J. Lindley Nat. Syst. Bot. (ed. 2) 190 Lacis and Podostemum in the character of their spathe and the emersion of their pedicels at the time of flowering, call remarkably to mind the habit of Jungermanniæ.

1837 W. Griffith Jrnls. Trav. (1847) 183 Equisetum occurs along the Boga Panee as well as a new species of Podostemon.

1846 J. Lindley Veg. Kingdom 482 Bongard first represented their true structure, and more recently Mr. Griffith has described two Indian species of Podostemon, with his habitual accuracy.

1866 D. Livingstone 12 July in Last Jrnls. (1874) I. iii. 71 This stream is rapid,..with many podostemons on the bottom.

1914 Proc. Royal Soc. 1913–14 B. 87 546 The most ‘primitive’ forms, Tristicha and Podostemon, which have neither flattened shoot-thallus nor root-thallus..are the most widespread and the most common.

1962 Limnol. & Oceanogr. 403/2 The effect of the river discharge was particularly noticeable on the amount of Podostemum present in the community.

1978 Flowering Plants of World 153/1 The most common genera [of Podostemaceae] are Apinagia (50 species, South America),..Podostemum (17 species, pantropical), [etc.].

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	podostemum
释义	Podostemumn. Brit. /ˌpɒdə(ʊ)ˈstiːməm/, U.S. /ˌpɑdoʊˈstiməm/ Forms: 1800s– Podostemon, 1800s– Podostemum. Also with lower-case initial. Origin: A borrowing from Latin. Etymon: Latin Podostemum. Etymology: < scientific Latin Podostemum ( A. Michaux Flora Boreali-Americana (1803) II. 164) < podo- podo- comb. form + ancient Greek στήμων warp, thread, taken in sense ‘stamen’ (see stamen n.); so called on account of the two stamens with filaments united for about half their length.In form podostemon after ancient Greek στήμων. N.E.D. (1907) gives the pronunciation (pǫdoˌstī·mǫ̆n) /pɒdəʊˈstiːmən/ for the form podostemon. A genus of dicotyledonous aquatic plants (the type genus of the family Podostemaceae), comprising plants with highly modified, mosslike foliage and inconspicuous flowers, occurring in tropical regions and North America where they are confined to swiftly flowing rivers; also ( podostemon or podostemum) a plant of this genus. ΘΚΠ the world > plants > particular plants > plants and herbs > aquatic, marsh, and sea-shore plants > [noun] > thread-foot river weed1832 Podostemum1836 podostemad1846 thread-foot1884 1836 J. Lindley Nat. Syst. Bot. (ed. 2) 190 Lacis and Podostemum in the character of their spathe and the emersion of their pedicels at the time of flowering, call remarkably to mind the habit of Jungermanniæ. 1837 W. Griffith Jrnls. Trav. (1847) 183 Equisetum occurs along the Boga Panee as well as a new species of Podostemon. 1846 J. Lindley Veg. Kingdom 482 Bongard first represented their true structure, and more recently Mr. Griffith has described two Indian species of Podostemon, with his habitual accuracy. 1866 D. Livingstone 12 July in Last Jrnls. (1874) I. iii. 71 This stream is rapid,..with many podostemons on the bottom. 1914 Proc. Royal Soc. 1913–14 B. 87 546 The most ‘primitive’ forms, Tristicha and Podostemon, which have neither flattened shoot-thallus nor root-thallus..are the most widespread and the most common. 1962 Limnol. & Oceanogr. 403/2 The effect of the river discharge was particularly noticeable on the amount of Podostemum present in the community. 1978 Flowering Plants of World 153/1 The most common genera [of Podostemaceae] are Apinagia (50 species, South America),..Podostemum (17 species, pantropical), [etc.]. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.1836
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