Ferns: some quick review & facts About _________ species worldwide They would generally be considered “________________” They represent the “first” major _____________ _______________….compare this to the mosses
Basic Morphology - Terms LEAF = BLADE = = is the flat, green, expanded part leaves/fronds vary in size and shape according to species Some species have different sizes and shapes for fertile and sterile leaves ex. sensitive fern ostrich fern Contains rachis + leaflets (pinnae) 1
Basic Morphology - Terms STALK = STIPE = supports the leaf below axis (i.e., first set of leaves/fronds Usually flat or concave in front Usually rounded in the back Young stems typically covered with hairs or scales 2
Basic Morphology - Terms ROOTS usual forms are thin, wiry, black, and forking. Shallow. Grow from sides and undersides of rhizome RHIZOME the part of a fern from which the fronds (leaves) and roots grow supports roots below and stalk above 3 4
Leaflet or Pinna (pinnae = plural) 5 Rachis = axis = midrib 6
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