orthotropous

American  

[awr-tho-truh-puhs] / ɔrˈθɒ trə pəs /

adjective

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

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orthotropous British  

/ ɔːˈθɒtrəpəs /

adjective

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

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Etymology

Origin of orthotropous

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

Example Sentences

Ovary 1-celled, with 3 parietal placentæ, each bearing a few orthotropous ovules; the capillary style coherent with the tube of the perianth; stigmas 3, large, 2-lobed or notched, exserted.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

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

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Ovaries at the base of the spadix, each surrounded by 4–5 staminodia connate into a cup, 1-celled, bearing 1–few amphitropous or nearly orthotropous ovules at the base; stigma almost sessile.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Herbs, with jointed stems, alternate entire leaves, and perfect flowers in spikes, entirely destitute of floral envelopes, and with 3–5 more or less separate or united ovaries.—Ovules few, orthotropous.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Ovules very numerous, scattered over the walls, orthotropous.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa