Pinus sibirica Du Tour

Iltis et. al. 980
Pinus siberica Du Tour
6 m. tree with broad outline; in young fruit*
in subalpine zone as codominant with Abies
siberica. This species in rich forest as
dominant to 800 m. where Pinus sylvatica tends
to replace it, butfhere trees near shore of
Lake Baikal (500 m.).
Cones dull purple maroon, 6-8 cm. long with
light brown umbo. When sectioned, rich bright
wine red inside.
Resmbling Pinus albicaulis (and more-or-less
P. flexilis)
TTCCÜ South Central SIBERIA
VOÜlVfRegion of LAKE BAIKAL)
KHAMAR-DABAN RANGE: Montane to alpine zone
along path in upper reaches of Slyudyanka
River Valley, 10-14 km SSW of SLYUDYANKA
(SW end of LAKE BAIKAL).
51°33-35*N, 103°36-38'E
H. H. Iltis
J. C. Coffey
M. F. Denton
Alt. 900-1850m
(2970-6120’)
15 July 1979
No.
4th field expedition conducted to the U.S.S.R. under the USA/USSR
Cooperative Agreement in the Protection of the Environment, Project
IV.I - Protection of Native Species of Flora. Sponsored by the Cary
Arboretum of the New York Botanical Garden.
T TCQP South Central SIBERIA
UOOlV (Region of LAKE BAIKAL)
a)/:Rocky	open Populus suaveolens—Abies
sibirica—Picea obovata—Pinus sylvestris
montane mixed forests along Slyudyanka R.,
with «Aconitum czekanovskyi, Delphinium
elatum, etc. Alt. 1000-1400m
b)	Lush moist to wet herbaceous montane—
subalpine meadows and streamsides, with
Delphinium elatum, Aconitum septentrionale
(= excelsum), Salix krilovii, Epilobium
angustifolium, Cirsium heterophyllum.
Alt. 1000-1330m
c)	Exposed dry rocky slopes in valley with
Rhododendron chrysanthum, Vaccinium myrtillus,
Solidago dahurica (virga-aurea), Sibbaldia
procumbens, Dryopteris carthusàana, Car ex
globularis. Alt. 1300m
d)	Steep, wooded marble cliffs and slopes
ca. 150m above valley, with Salix vestita,
Mertensia sibirica, Aconitum sukaczevii
(topotype?), Asplénium viride, Woodsia.
(End of road near miners camp). Alt.1200 m
e)	Mesic subalpine meadows with Aquilegia
glandulosa, Rhaponticum carthamoides,
Pedicularis incarnata, Carex mimula,
C^. spp., C^. perfusca, Crepis lyrata,
Calamagrostis purpurea. Alt. 1330-1500m
^ Rocky dry open subalpine forest of
Pinus sibirica—Abies sibirica—Betula
pendula-platyphylla, with Rhododendron
chrysanthum, Vaccinium myrtillus, Alnus
fruticosa, Salix krilovii, Lycopodium
alpinum, Nardus stricta, Carex in under-
story. Alt. 1500-1700m
g) Alpine shrub community of Rhododendron
chrysanthum, Phyllodoce coerulea, Pinus
pumila, Salix krilovii, Gentiana algida,
Trollius cf. asiaticus. Alt. 1850m
H. H. Iltis	15 July 1979
J. C. Coffey
M. F. Denton	No. 980
4th field expedition conducted to the U.S.S.R. under the USA/USSR
Cooperative Agreement in the Protection of the Environment, Project
IV.I - Protection of Native Species of Flora. Sponsored by the Cary
Arboretum of the New York Botanical Garden.
04278056