rhachis

[rey-kis]

noun

plural

rhachises, rhachides 

1. a variant of rachis.

rhachis

/ ˈreɪkɪs /

noun

1. a variant spelling of rachis

Example Sentences

Perigynium much as in the Montanæ; spike one, staminate above; pistillate flowers few, often remote, usually on a more or less zigzag rhachis; scales prolonged and leaf-like.—Sp.

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Spikelets of a single perfect or unisexual or rudimentary flower, in jointed spikes, in pairs at each joint, mostly imbedded in the thick rhachis.

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One spikelet of each pair sterile and shortly pedicelled, the other fertile, sessile and sunk in the rhachis.

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Spikelets 4–8-flowered, glabrous or nearly so; glumes 3–7-nerved; rhachis glabrous, but rough on the edges; awns when present straight; leaves flat and often roughish or pubescent above.

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Fronds triangular-ovate, 1–3´ long, 3–4-pinnate; rhachis and branches straight, black and shining; ultimate pinnules scarcely a line long, white and powdery on the lower surface.—Clefts of calcareous rocks, Mo., Kan., and southwestward.

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