plural noun
Lig·​no·​sae | \ ligˈnō(ˌ)sē\

Definition of Lignosae

in some classifications
: a phylum comprising all those plants that are fundamentally woody and remain predominantly so — compare herbaceae

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History and Etymology for Lignosae

New Latin, from Latin, feminine plural of lignosus woody, from lign- + -osus -ous

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