Sclereid

[1] The presence of numerous sclereids form the cores of apples and produce the gritty texture of guavas.Although sclereids are variable in shape, the cells are generally isodiametric, prosenchymatic, forked, or elaborately branched.Sclerification typically involves thickening of the cell wall, increasing rigidity.In the phloem, when tissue ceases to function in conduction cells may begin sclerification.Sclereids can also form part of or the entire epidermis of foliar structures such as the clove scales of Allium sativum.
Fresh mount of a sclereid in a banana fruit
Long tapered sclereids supporting a leaf edge in Dionysia kossinskyi
sclerenchymacellular wallsplantsapplesguavasparenchymaidioblastepidermisground tissuevascular tissueAlexander TschirchsclerosisphloemcambialHoya carnosaPodocarpusmesophyllleaf veinsTrochodendronwater lilyyellow pond lilyfoliarAllium sativumquinceendocarpLeguminoussoybeancoconutsBiological tissuesConnectiveEpithelialMuscularNervousBulliform cellCuticleGuard cellPavement cellSubsidiary cellPeridermPhellemPhellodermCompanion cellPhloem fiberSieve tubeTracheidVessel elementXylem fiberXylem parenchymaAerenchymaChlorenchymaCollenchymaMeristematic tissueGround meristemProcambiumProtodermCork cambiumVascular cambiumCortexEndodermisExodermisHistology