Crossword clue: having the axis of an ovule or seed straight from the hilum and chalaza to the orifice or the micropyle; atropous.

The most common answer is orthotropal (11 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

orthotropal 11 letters web-def

Having the axis of an ovule or seed straight from the hilum and chalaza to the orifice or the micropyle; atropous.

orthotropous 12 letters web-def

(of a plant ovule) completely straight with the micropyle at the apex