Huperzia appalachiana

Huperzia appalachiana

Shoots erect, determinate, 6--10 cm, clustered to rarely shortly decumbent, decumbent portion to 1 cm; leaves in mature distal portion markedly smaller than leaves in juvenile proximal portion; annual constrictions absent; juvenile growth erect. Leaves ascending to spreading (juvenile portion) or ascending to appressed (mature portion), green to yellow-green, not lustrous; leaves in juvenile portion narrowly triangular, 4--6 mm, widest at base; leaves in mature portion narrowly triangular, 2--3.5 mm; margins entire or with occasional papillae; stomates present on both surfaces, numerous (35--60 per 1/2 leaf) on adaxial surface. Gemmiferous branchlets produced throughout mature portion; gemmae 3--4 X 2.5--3.5 mm; lateral leaves 0.5--1 mm wide, narrowly acute. Spores 29--35 µm.
Huperzia appalachiana Growing on a north-facing talus slope in mosses and well-decomposed wood. Geotagged,Huperzia appalachiana,Minnesota,Spring,United States,clubmoss,talus slope

Habitat

Damp, acidic rocks such as on cliffs and talus slopes. Prefers cool temperatures.

References:

Some text fragments are auto parsed from Wikipedia.

https://en.wikipedia.org/wiki/Huperzia
https://www.minnesotawildflowers.info/fern/appalachian-firmoss
http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233500681
Taxonomy
KingdomPlantae
DivisionLycopodiophyta
ClassLycopodiopsida
OrderLycopodiales
FamilyLycopodiaceae
GenusHuperzia
SpeciesHuperzia appalachiana