Phlegmariurus mannii

{{Short description|Species of spore-bearing plant}}

{{Speciesbox

| status = {{TNCStatus}}

| status_system = TNC

| status_ref = {{Cite web|date=2022 |url= https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.140536|access-date=27 May 2022 |website=NatureServe Explorer Huperzia mannii |publisher=NatureServe|title= NatureServe Explorer }}

| genus = Phlegmariurus

| species = mannii

| authority = (Hillebr.) W.H.Wagner

| synonyms =

{{Species list

|Huperzia mannii|(Hillebr.) Holub

|Lycopodium mannii|(Hillebr.) Skottsb.

|Lycopodium phlegmaria var. mannii|Hillebr.

}}

| synonyms_ref =

}}

Phlegmariurus mannii, synonym Huperzia mannii, is a species of lycopod, known by the common names Mann's clubmoss and wawae{{okina}}iole. It is endemic to Hawaii, where there are only six populations remaining.{{cite web |url=http://www.natureserve.org/explorer/servlet/NatureServe?searchName=Huperzia+mannii |title=Huperzia mannii |publisher=The Nature Conservancy}} It is a federally listed endangered species of the United States.

This plant is an epiphyte which grows upon other plants, especially koa (Acacia koa), {{okina}}olapa (Cheirodendron trigynum), and kawa{{okina}}u (Ilex anomala).[http://www.state.hi.us/dlnr/dofaw/cwcs/files/Flora%20fact%20sheets/Hup_man%20plant%20NTBG_W.pdf Huperzia mannii.] {{Webarchive|url=https://web.archive.org/web/20120531094148/http://www.state.hi.us/dlnr/dofaw/cwcs/files/Flora%20fact%20sheets/Hup_man%20plant%20NTBG_W.pdf |date=2012-05-31 }} Hawaii's Comprehensive Wildlife Conservation Strategy. It has a hanging, branching, reddish stem no more than {{Convert|10|cm|in}} long. Each branch has three longitudinal rows of toothlike leaves. When reproducing, the plant produces a branching fruiting spike which may be up to {{Convert|20|cm|in}} long.

Today the plant is known from just a few occurrences on the islands of Maui and Hawaii. It is historically known from Kauai, but it may be extirpated there. Its survival is threatened by habitat damage caused by feral pigs, cattle, and Introduced plant species, as well as its low population.