''Hirmeriella'' is a genus of fossil tree, a

conifer Conifers are a group of conifer cone, cone-bearing Spermatophyte, seed plants, a subset of gymnosperms. Scientifically, they make up the phylum, division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a single ...

that was widespread in Late Triassic and Early Jurassic of Germany, the UK, and Poland.BARBACKA M., ZIAJA J., WCISŁO-LURANIEC E. 200
Hirmeriella muensteri (Schenk) Jung from Odrowąż (Poland), with female and male cones, and in situ Classopollis pollen grains
Acta Palaeobotanica 47(2): 339–357, 2007 It is common in the fissure fills of

Glamorgan , HQ = Cardiff , Government = Glamorgan County Council (1889–1974) , Origin= , Code = GLA , CodeName = Chapman code , Replace = * West Glamorgan * Mid Glamorgan * South Glamorgan , Motto ...

, south Wales, where many of the UK's earliest mammal fossils have been found such as ''

Morganucodon ''Morganucodon'' (" Glamorgan tooth") is an early mammaliaform genus that lived from the Late Triassic to the Middle Jurassic. It first appeared about 205 million years ago. Unlike many other early mammaliaforms, ''Morganucodon'' is well represe ...

''. The name ''Hirmeriella muensteri'' has now been used to describe the whole plant, but it may also specifically refer to fossils of female parts of the plant, while male parts of the conifer may be known by the scientific name ''Brachyphyllum muensteri'', and fossils with neither gender parts have been known as ''Pagiophyllum''. ''Hirmeriella'' is also known by the pseudonym ''Cheirolepis muensteri''. ''Hirmeriella muensteri'' may have grown in dry, extreme conditions, and been fire tolerant, although other authors have cited evidence from water wicking leaves as signs they were found in humid, water rich environments.METCALFE C. R. & CHALK L. 1979. Anatomy of the Dicotyledons. Oxford University Press.

References

Triassic plants Jurassic plants Conifers Mesozoic trees Prehistoric gymnosperm genera {{jurassic-plant-stub