Dværgulvefod-familien

Dværgulvefod-familien
Selaginella canaliculata.
Selaginella canaliculata.
Videnskabelig klassifikation
RigePlantae (Planter)
UnderrigeEmbryophyta (Stængelplanter)
DivisionLycopodiophyta (Ulvefodsplanter)
KlasseSelaginellopsida (Dværgulvefodsplanter)
OrdenSelaginellales (Dværgulvefod-ordenen)
FamilieSelaginellaceae
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Dværgulvefod-familien (Selaginellaceae) er en monotypisk familie med en enkelt slægt og op mod 700 arter. Den synlige del af planten er opstigende skud med tætsiddende, bittesmå skælagtige blade i 4 rækker. Fra de krybende stængler udgår primitive rødder.

Skuddene udvikler 4 megasporer, der danner mikrosporer som udvikles til en forkim, hvor svømmende sædceller opsøger æganlægget, når bladet er dækket af en vandhinde.

Deværgulvefod er udbredt over det meste af verdnen, men forekommer hovedsageligt i tropiske skovområder.

Slægter

Rødlistede arter

Note


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