Psilophytales
— Noun
– English
~ Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants
psilophyte
— Noun
– English
~ any plant of the order Psilophytales: a savannah plant
psilophyton
— Noun
– English
~ any plant or fossil of the genus Psilophyton
Psilopsida
— Noun
– English
~ whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs
psilosis
— Noun
– English
~ a chronic disorder that occurs in tropical and non-tropical forms and in both children and adults; nutrients are not absorbed; symptoms include foul-smelling diarrhea and emaciation
Psilotaceae
— Noun
– English
~ small family of lower ferns having nearly naked stems and minute scalelike leaves
Psilotales
— Noun
– English
~ lower vascular plants having dichotomously branched sporophyte divided into aerial shoot and rhizome and lacking true roots
Psilotatae
— Noun
– English
~ whisk ferns; comprising the family Psilotaceae or Psilotatae: vascular plants with no roots, partial if any leaf differentiation, and rudimentary spore sacs
Psilotum nudum
— Noun
– English
~ pantropical epiphytic or terrestrial whisk fern with usually dull yellow branches and minute leaves; America; Japan; Australia
Psilotum
— Noun
– English
~ type genus of the Psilotaceae