Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having the seeds straight, as in the fruits of some umbelliferous plants.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having the seeds straight, as in the fruits of some umbelliferous plants; -- opposed to cœlospermous.

from The Century Dictionary and Cyclopedia

  • In botany, having the seed straight.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek

Examples

  • But with respect to the seeds, it seems impossible that their differences in shape, which are not always correlated with any difference in the corolla, can be in any way beneficial: yet in the Umbelliferæ these differences are of such apparent importance—the seeds being sometimes orthospermous in the exterior flowers and cœlospermous in the central flowers, —that the elder De Candolle founded his main divisions in the order on such characters.

    V. Laws of Variation. Correlated Variation

  • In certain Umbelliferæ the exterior seeds, according to Tausch, are orthospermous, and the central one cœlospermous, and this is a character which was considered by De Candolle to be in other species of the highest systematic importance.

    VII. Miscellaneous Objections to the Theory of Natural Selection

  • Umbelliferæ these differences are of such apparent importance -- the seeds being in some cases, according to Tausch, orthospermous in the exterior flowers and coelospermous in the central flowers, -- that the elder De

    On the Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. (2nd edition)

  • The seeds of Umbelliferae in the same relative positions are coelospermous and orthospermous.

    More Letters of Charles Darwin — Volume 2

  • But in regard to the differences both in the internal and external structure of the seeds, which are not always correlated with any differences in the flowers, it seems impossible that they can be in any way advantageous to the plant: yet 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 coelospermous in the central flowers, -- that the elder De Candolle founded his main divisions of the order on analogous differences.

    On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life

  • But in regard to the differences both in the internal and external structure of the seeds, which are not always correlated with any differences in the flowers, it seems impossible that they can be in any way advantageous to the plant: yet 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 coelospermous in the central flowers, — that the elder De Candolle founded his main divisions of the order on analogous differences.

    On the Origin of Species~ Chapter 05 (historical)

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