HyperDic: class_psilopsida

English > 1 sense of the expression class Psilopsida:
NOUNplantclass Psilopsida, Psilopsida, Psilotatae, class Psilotataewhisk ferns
English > class Psilopsida: 1 sense > noun 1, plant
Meaningwhisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs.
SynonymsPsilopsida, Psilotatae, class Psilotatae
Member ofPteridophyta, division PteridophytaContaining all the vascular plants that do not bear seeds
MembersPsilotales, order PsilotalesLower vascular plants having dichotomously branched sporophyte divided into aerial shoot and rhizome and lacking true roots
Broaderclass(biology) a taxonomic group containing one or more orders

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