Betula pubescens

Growing form

Deciduous tree.

Size

8–20 m high.

Stem

The tree has a single bole or multiple boles. The bark is white and black-striate papery exfoliating bark. There is no dark bark at the base of the bole. The apices of old twigs are occasionally pendent. The annual shoots are pubescent and without tubercles

Leaf

The leaf arrangement is spiral. The lamina is simple, 1.5–6 cm long, ovate, short-acuminate and serrate.

Flower

The plant is monoecious and flowers after the budding of the leaves. The inflorescence is a catkin formed by numerous two- or three-floreted cymules. The flowers are unisexual, small, achlamydeous or the perianth is minute. Staminate and pistillate flowers are in separate catkins.

Fruit and seed

The fruit is a winged, small, flat achene. The achene is pubescent at the apex. The wings are as wide as the achene. The fruit-bearing catkins disintegrate as the fruits abscise.

Source: Pinkka e-learning: Botanical excursion to Lammi - Esker Untulaharju, nature trail, Lammi village CC BY 4.0

The map represents observations of this taxon, but it may not be used as a distribution map.

squares
Observations
  • Total squares
Checklist
MR.1
Scientific name
Betula pubescens
Author
Ehrh.
Vernacular names
  • hieskoivu (Finnish)
  • glasbjörk (Swedish)
Identifier
http://tun.fi/MX.37999
Taxon rank
species
Occurrence in Finland
Collected from Finland
Status in Finland
  • AOV - spontaneous, old, resident
Regulatory Status
  • Vascular plants – SUMI Project 2022 ?
Finnish Regional Red List Category
  • 2019 LC – Least Concern
  • 2010 NE – Not Evaluated
Expert
  • Mikko Piirainen
DNA barcode sequences
Betula pubescens
16 public records
Informal groups
  • Vascular plants