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Related to phyllotaxy: alternate phyllotaxy


 (fĭl′ə-tăk′sĭs) also phyl·lo·tax·y (fĭl′ə-tăk′sē)
n. pl. phyl·lo·tax·es also phyl·lo·tax·ies
The arrangement of leaves on a stem.

phyl′lo·tac′tic (-tăk′tĭk) adj.
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.


(ˈfɪl əˌtæk si)

n., pl. -tax•ies.
1. the arrangement of leaves on a stem or axis.
2. the study of such arrangement.
phyl`lo•tac′tic (-ˈtæk tɪk) phyl`lo•tax′ic, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

phyllotaxy, phyllotaxis

1. the arrangement of the leaves on the stem of a plant.
2. the science or study of the arrangement and distribution of leaves. — phyllotactic, adj.
See also: Leaves
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
A) The orthotopic axis has a vertical development and a leaf orientation by spiral phyllotaxy; B) The plagiotrophycal axis has a horizontal orientation and leaves on the same plane; C) Continuous branching; D) Rhythmic branching; E) Growth determined, with the axis ending in an inflorescence; F) Determinate growth, like a Prevost model (Cordia americana), ending in a parenchyma.
For example, a tomato phyllotaxy usually consists of 5 leaves or more, as shown in Figure 2(a).
Mosses leaves commonly exhibit a spiral phyllotaxy. Rhizoids are often branched.
This explains the impact of phyllotaxy and size of the tree to protect the individuals and facilitate the mating againstharsh climatic conditions by creating a specific microclimate (fig.
The oldest groups of this subtribe with a distichous phyllotaxy (e.g.
In species of Scleria with the latter type of spikelet--considering each axis separately (the main axis and the branched paracladia)--, the phyllotaxy pattern changes first from spiral (in the vegetative part) to distichous and then again from distichous to spiral.
Terete, wings absent 6 Cuticle Striated 7 Trichomes covering Present, conical, unicellular 8 Glandular trichomes Present; stalk unicellular; head multicellular (4-cells) 9 Chlorenchyma Present 10 Collenchyma Present 11 Endodermis Indistinct 12 Pericyclic fibers Present 13 Phloem fibers Present in old stem only 14 Pith Often an angular hollow cells pitted in older stem Leaf structure 1 Phyllotaxy Alternate 2 Shape Linear, lower / Oblanceolate, upper elliptic 3 Size 12-38 x 5-10 mm 4 Apex Obtuse-muronate 5 Surface Hairy Midrib 1 Outline in T.S.
In tropical understory species, morphological variation related to the efficient absorption of light is great, encompassing species with different patterns of phyllotaxy, leaf sizes, types of crown, and plant architecture (Valladares, et al.