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Genus Tmesipteris Family Psilotaceae

Description: Plants usually epiphytic and growing on the trunks of treeferns, rarely terrestrial; rhizomes long-creeping; aerial stems pendent, usually unbranched.

Sterile leaves simple and decurrent; fertile leaves shortly stalked and divided into 2 almost to the base.

Synangium consisting of 2 sporangia, borne just below the division of the fertile leaves.


Distribution and occurrence: World: 10 spp., N.Z., trop. to temp. regions. Aust.: 6 spp., Qld, N.S.W., Vic., Tas.

Text by Peter G. Wilson
Taxon concept:

 Key to the species 
1Synangia rounded, aerial stems mostly <15 cm long2
Synangia usually pointed, stems generally >15 cm long3
2Apices of the leaves acute, usually tapering evenly into an indistinctly mucronate tipTmesipteris parva
Apices of the leaves rounded, mucronate tip distinct
                       Back to 1
Tmesipteris ovata
3Stems smooth at the base except for a single groove on the upper surface; leaves broad-oblong to oblong, mostly 5–8 mm wideTmesipteris obliqua
Stems ridged at the base on all sides with 3 or 4 grooves; leaves oblong to narrow-linear, mostly 2–5 mm wide
                       Back to 1
Tmesipteris truncata

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