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orthospermous
(botany) Having the seeds straight, as in the fruits of some umbelliferous plants.
💬 Quotations
But in regard to the differences both in the internal and external structure of the seeds, […] in the Umbelliferae these differences are of such apparent importance—the seeds being in some cases, according to Tausch, orthospermous in the exterior flowers and cœlospermous in the central flowers,—[…]