binervate

From bi- +‎ nerve (“a leaf vein”) +‎ -ate (adjective-forming suffix).

binervate (not comparable)

1. (zoology, botany) Of leaves, wings, etc. having only two nerves or ribs.

   The binervate wings of this species are elongated and nearly transparent.

   • 1863, Miles Joseph Berkeley, Handbook of British Mosses, London: Lovell Reeve & Co., page 68:

     (Hookeria laete-virens): stem procumbent, subpinnate; leaves suddenly acuminate, ovate, or ovate-oblong, with a thickened margin, sharply toothed, binervate.

   • 1901, Antony Gepp, “Mosses”, in Catalogue of the African Plants Collected by Dr. Friedrich Welwitsch in 1853–61‎^[1], volume II, Part II: Cryptogamia, London: British Museum (Natural History), Department of Botany, pages 292, 298:

     (Pilotrichella welwitschii): ...the ramuline leaves are spathulate from a contracted base, obsoletely binervate, more longly acuminate, with upper margins involute and serrulate.
     (Erythrodontium bicolor): Ramuline leaves, appressed when dry, erecto-patent when wet, 0.85 mm. long by 0.375 mm. wide, from a broad cordate base elliptic-ovate acuminate, slightly hollowed, shortly binervate, with margins erect or slightly recurved, minutely serrulate above middle...

   • 1987, Excerpta botanica, Sectio A: Taxonomica et chorologica, volume 48, number 7, Stuttgart, New York: Gustav Fischer Verlag, page 124:

     ...seedlings with two binervate cotyledons.

• “binervate”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.