phyllotaxy


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Related to phyllotaxy: alternate phyllotaxy

phyl·lo·tax·is

 (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.

phyl•lo•tax•y

(ˈfɪl əˌtæk si)

n., pl. -tax•ies.
1. the arrangement of leaves on a stem or axis.
2. the study of such arrangement.
[1855–60]
phyl`lo•tac′tic (-ˈtæk tɪk) phyl`lo•tax′ic, adj.

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
References in periodicals archive ?
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.
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.
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.
In the Pooideae in contrast, the distichous phyllotaxy of the leaves continues into the inflorescence; the distichy of the primary inflorescence branches thus appears to be a synapomorphy for Pooideae (Evans, 1940).