orthotropous

[ awr-tho-truh-puhs ]

Phonetic (Standard)IPA

adjective

Botany. (of an ovule) straight and symmetrical, with the chalaza at the evident base and the micropyle at the opposite extremity.

orthotropous

/ ɔːˈθɒtrəpəs /

(of a plant ovule) growing straight during development so that the micropyle is at the apex Compare anatropous

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From the New Latin word orthotropus, dating back to 1820–30. See ortho-, -tropous

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Nutlets coriaceous, small, tawny-hairy below, containing a single orthotropous pendulous seed.

Fruit a kind of dry drupe, with a crustaceous or bony nut-shell, containing a large 4-lobed orthotropous seed.

Ovary 2–3-celled, with several pendulous orthotropous ovules in each cell; stigma minute.

Orthotropous or Straight, those which develop without curving or turning, as in Fig. 344.

Orthotropous ovule of Buckwheat: c, hilum and chalaza; f, orifice.

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