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Related to polystichous: Polystichum


adj. Botany
Arranged in two or more series or rows.

[Greek polustikhos, of many lines : polu-, poly- + stikhos, row; see stich.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Botany) (of plant parts) arranged in a number of rows
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(pəˈlɪs tɪ kəs)

arranged in rows or series.
[1885–90; < Greek polýstichos having many lines or verses; see poly-, -stichous]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The fused, single duct that joins the ducts of the paired ventrolateral foregut glands in Dondersia is found in other Solenogastres genera with monostichous and polystichous radulae (Nierstrasz, 1905; Scheltema et al., 2003) and is thus not unique to the Dondersiidae.
1 mm width, deciduous; terciary branches numerous; flowers numerous per branch, polystichous, rotate to slightly campanulate, ca.
Floral scales polystichous, divergent, falling before the achenes, 1.52.2 mm long, 0.9-1.2 mm wide, membranous, elliptic, acute to subacuminate, greenish to stramineous along midvein, chestnut to reddish brown on the sides, the apex and upper portion of the margins hyaline; proximal scale empty, 1.2-1.7 mm long, the apex acute to rounded, shorter but otherwise similar to the floral scales.
Inflorescences lateral, erect, paniculate; scape much longer than leaves, emerging from a bundle of bracts and sheaths resembling new rosette borne in the axils of leaves, cylindrical in cross section, 4-5(-10) mm in diameter, light to dark brown, glabrous basally, apically slightly white-lepidote, internodes (2-)4.5-5 cm long, basal bracts of the scape polystichous, narrowly triangular, acute and acuminate, 4.5-7 cm long, 1.4-1.6 cm wide, densely imbricate, conspicuously nerved, densely lepidote abaxially, margins laxly spinose, upper scape bracts polystichous, adpressed to the peduncle, narrowly triangular, acute and acuminate, 2-3.2(-5.5) cm long, 6-7(-9) mm wide, conspicuously lepidote abaxially, sparsely lepidote adaxially, strongly nerved, margins thin, laxly spinose.
Within the Tillandsioideae subfamily, they have been distinguished by a suite of characters including a usually polystichous arrangement of flowers, and joined (fused or conglutinated) petals which are white, cream, green, and yellow to orange (never blue!).
Body elongate, slender, smooth, to 10 cm long, with or without posterior fingerlike projection; skeletal spicules hollow, in several layers; upright spicules, if present, solid, paddle-shaped, small; cuticle thick; epidermis thin, with long, stalked epidermal papillae extending through the cuticle; radula polystichous, largest teeth in each row lateral, tooth rows on each side of median line mirror images, some species with a median tooth; anteroventral radular pocket single (Fig.