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A supportive tissue of plants, consisting of elongated living cells with unevenly thickened walls.

col′len·chym′a·tous (kŏl′ən-kĭm′ə-təs) adj.


(Botany) a strengthening and supporting tissue in plants, consisting of elongated living cells whose walls are thickened with cellulose and pectins
[C19: New Latin, from Greek kolla glue + enkhuma infusion]
collenchymatous adj


(kəˈlɛŋ kə mə)

a layer of plant tissue, often of new stem growth, that consists of elongated cells thickened at the corners.
[1825–35; < New Latin < Greek kóll(a) glue + énchyma content, infusion (see mesenchyme)]
col•len•chym•a•tous (ˌkɒl ənˈkɪm ə təs) col•len`chy•mat′ic (-ˈmæt ɪk) adj.
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References in periodicals archive ?
4A) and that the epidermis cells was not surrounded by clear layer of cuticle and composed of a compact cells containing chlorophyll, either the cortex, it begins with two layers of collenchyma cells, located under the epidermis and is characterized by the absent of air spaces between the cells (Fig.
In regard to the anatomical characteristics, the leaves in the transverse section showed a uniseriated epidermis on both sides, homogeneous collenchyma with isodiametric cells and a thin cell wall.
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.
On the other hand, the Manihot caerulescens and Manihot tripartita fruits also present two regions in the sclerenchymatous mesocarp, being a constituted of gelatinous fiber-sclereids and another of brachysclereids; the endocarp possesses either collenchyma or fiber-sclereids (OLIVEIRA, 2007).
On the outside of the vascular cylinder lies 5 to 8 layers of angular collenchyma which forms the main mechanical tissue in the primary stem.
preserved epidermis reveals extensions of collenchyma and parenchyma that form triangular ridges, similar to those in winged stems of some
The main nerve, very protuberant, in the adaxial and abaxial face, was strengthened by laminar collenchyma.
Such strands are most frequently encountered when there is little or no collenchyma development.