CELL TYPE	CYTOPLASMIC FEATURES	CELL WALL FEATURES	3-D GEOMETRY
Sclereid	Typically no cytoplasm at maturity	Uniformly thick, lignified secondary cell wall with simple or ramiform  pits	Subcategories based on 3-D Geometry   Name Shape Brachysclereid Isodiametric Macrosclereid Columnar Osteosclereid Columnar with enlarged ends Astrosclereid Stellate Trichosclereid Elongate and branched Filiform sclereid Very elongate and unbranched