biseriate

[bahy-seer-ee-it, ‑-eyt]

adjective

Botany.

1. arranged in two rows; arranged in two cycles or whorls.

biseriate

/ ˌbaɪˈsɪərɪɪt /

adjective

1. (of plant parts, such as petals) arranged in two whorls, cycles, rows, or series

Other Word Forms

• biseriately adverb

Word History and Origins

Origin of biseriate¹

First recorded in 1845–50; bi- ¹ ( def. ) + seriate ( def. )

Example Sentences

Biserial, or Biseriate, occupying two rows, one within the other.

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Spikelets are 2-flowered, narrow, biseriate, unilateral, imbricate on the rachis of a solitary spike; the rachilla is elongate between the flowering glumes and produced beyond them and terminates in a rudimentary awned glume.

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The spikelets are compressed laterally, sessile or obscurely pedicelled, imbricate, alternately biseriate on the ventral side of the rachis, 1-flowered; the rachilla is produced into a bristle behind the palea, with or without a minute glume.

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Spikelets are unilateral, sessile, crowded, biseriate on a slender rachis with four to six glumes and 1 to 3-flowered; the rachilla is produced and disarticulating above the empty glumes.

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The spikelets are green or purplish, 3-awned, unilaterally biseriate on the outside of the rachis, 1/10 inch excluding the awn; the rachilla is bearded at the base, but is shorter than the third glume and bears two barren glumes.

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