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Betula nana L.

13 photos.
Known as "bog birch" and sharing the common name "dwarf birch" with Betula glandulosa,
this species is smaller than glandulosaNana hybridizes with glandulosa where the ranges
overlap and many (maybe all) of the photos below are probably of hybrids.

ITIS Taxonomic Serial No. 19479








1.  Early June.  Male catkins and fully
developed leaves. Leaves wider than long
are common.  Note resin glands on stems.

2.  Early June.  Male and female catkins

3.  Early June.  fully developed male

4.  Early June.  Young plant in sheltered

5.  Early June.  Fully leaved-out shrubs.

6.  Early June.  Prostrate shrubs on Eagle
summit.  Above tree-line and wind-swept.

7.  Early June.  Leaves from the four
species of birch in our area.

8.  Late June.  Ends of branches from
the four species of birch.

9.  Late August.  Red fall color.
with next year's male catkins

10.  Early September. Fully developed
female catkins and developing male catkins
which will bloom the next spring.
  Nana fall colors are more
variable than those of glandulosa.

11.  Early September.  More fall colors.

12. Early September.  Recently the fall colors
on Eagle summit have faded before they
fully developed.

13.   June 12, 2009.   An infestation of some kind.

Photos 1, 2, 4, 5, 9 and 10 taken
near upper Half Dollar creek.
65°  25.62' N,   144°  46.51' W
Elev. 2050 ft.

Photos 3, 6 and 12 taken on Eagle summit.
65°  29.22' N,   145°  23.56' W
Elev. 3700 ft.

Photos 7, 8 and 11 taken at 8 mile
Portage Creek road.
65°  25.76' N,  144°  46.65' W
Elev. 2200 ft.

Photo 13 taken on the hillside
above the right limit of Harrison creek
between Squaw creek and Bottom Dollar creek.
Latitude: N 65° 22' 46.83"
Longitude: W 144° 50' 48.981"
Altitude: 493.84 m.