2. Soft & Hard Pines
• Soft pines have these features:
• needles usually in bundles of 5, sometimes 4.
• bundle sheath of needles is shed.
• cones usually are up to 2quot; long and have a stalk.
• scales on the cones are usually without prickles.
• Hard pines have these features:
• needles usually in bundles of 2 or 3; up to 8quot; or more.
• bundle sheath persists (not shed after the first year).
• cones often are over 2quot; long and usually without a stalk.
• scales on the cones are usually thick, woody, and armed
with prickles.
4. • Typically small and
contorted by the wind
and harsh growing
conditions, grows very
slowly
5. Pinus aristata leaf
• short (1 to 1 1/2 inches
long), curved, fascicles
of 5, dark green but
usually covered with
white dots of dried
resin. Remain on tree
for 10-17 years, giving
a bushy appearance
that resembles a fox's
tail.
6.
7. Pinus aristata flower
• Monoecious;
• male cones small, dark
orange and often
clustered near the ends
of branches;
• female cones occur
singly or in pairs near
the ends of branches.
http://www.cnr.vt.edu/dendro/dendrology/syllabus/Paristata.htm
8. Pinus aristata seed
• Moderate sized woody cone (about 3 inches
long)
• with a short stalk;
• imbricate scales are thickened
• and tipped with a long bristle, giving rise to
its common name.
• Seeds are winged.
9.
10. Pinus aristata bark
• Young bark is thin, smooth, and gray-
white later becoming furrowed and
reddish-brown.
• Old trees on harsh, windy sites may
have only a few strands of bark
remaining in crevices where it is
protected from sandblasting winds.
11. ID Pinus aristata
• needles in 5's, tufted apperance
• dwarf habit
• white flecks on needles
• Long thin ‘bristle’ at the end of each scale
• retention of 17 years of needles
12.
13.
14. Pinus contorta latifolia
Lodgepole Pine
• Needles persistent for
several years
• Form: Tall, slender
with narrow loose
crown
27. Pinus edulis leaf
• Usually two needles per
fascicle
• Needles are coarse, thick,
curved, blue-green or
yellow-green, stiff
• one to two inches long
30. Pinus edulis flower
• Monoecious; males
red, cylindrical, in
clusters near ends of
branches
• females purplish at
branch tips.
Male
http://selectree.calpoly.edu/photos.lasso?KeyValue=1045#4
31. Pinus edulis fruit
• Cones are ovoid, 2 inches
long, short stalked, brown in
color, with very thick cone
scales
• Each scale contains two very
large edible quot;pine nuts“
• Maturing in September and
October
34. • A small tree with an irregular rounded
crown
35. ID Pinus edulis
• Needles in bundles of two
• Needles distinct odor
• Medium green to blue
• Needles retained 3 to 9 years
• The buds are golden tan, long and narrow.
• The pinon cone is quite small with a small number
of scales, but the seeds are large in comparison, and
edible, even for humans, Pinus edulis (edible).
• Pine cones generally take two years to
mature and release their seeds.
36.
37.
38. Pinus flexilis Limber Pine
• Typically small (30 to
50 feet tall and 15 to
35 feet diameter) and
contorted by the wind
and harsh growing
conditions. Often has
multiple, plume-like
tops with drooping
branches
39. Pinus flexilis
Limber Pine
• Bark thin, smooth gray white when young, older
dark to brown with deep fissures and square plates
• Small and contorted by the wind
• Needles very soft to the touch
• 'Vanderwolf's Pyramid' - Perhaps the most
popular selection at specialty nurseries, this
selection grows with a broad, upright pyramidal
habit. The needles are a bright blue-green color
40.
41. Pinus flexilis leaf
• short (2 1/2 to 4 inches
long)
• fascicles of 5
• dark green and rigid
with lengthwise rows
of stomatal bloom*
• Remain on tree for 5
to 6 years
•Stomatal bloom is white waxy powder on surface, looks like
a white line but is really small white dots
43. Pinus flexilis Flower
• Monoecious; male
cones are small and
reddish; (csu – yellow)
• female cones are bright
reddish-purple
http://www.colostate.edu/Depts/CoopEx
t/4DMG/Trees/limber.htm
44. Pinus flexilis fruit
• Moderate sized woody
cone (3 to 6 inches long)
with a short stalk.
Imbricate scales are thick,
blunt, slightly reflexed, and
unarmed
• Cones turn from green to
brown as they ripen and
scales open to release their
seeds
• Seeds are large and usually
wingless.
45.
46. Pinus flexilis bark
• Initially thin,
smooth and
gray-white; later
it darkens to
brown or black
with deep
fissures and
square plates
53. Pinus nigra
• ID Features
– long needles in twos
– needles do not readily
break when bent back
on themselves
– needles sharp
– thick, blocky, gray and
brown bark
54. Pinus nigra leaf
• to 6 inches
long, flexible
with two thick,
dark green
needles per
fascicle
• Holds on for 4
years
55. Pinus nigra flower
• Monoecious; males
cylindrical, yellow, in
large clusters along
twigs; females oval,
yellow to purple
56. Pinus nigra fruit
• Cones are ovoid, 2 to 3 inches long, yellow-
brown in color.
• The umbo is armed with a very short
prickle.
• Maturing September to November
62. Pinus ponderosa
Ponderosa Pine
• A large tree with an
irregular crown,
eventually developing
a flat top or short
conical crown.
Ponderosa pine self-
prunes well and
develops a clear bole
63. Pinus ponderosa
Leaf
• Evergreen, 5 to 10
inches long, with three
(sometimes 2) tough,
yellow-green needles
per fascicle. When
crushed, needles have a
turpentine odor
sometimes reminiscent
of citrus
65. Pinus ponderosa flowers
• Monoecious;
males yellow-
red, cylindrical,
in clusters near
ends of
branches;
females reddish
at branch tips
66. Pinus ponderosa Fruit
• Cones are ovoid, 3 to 6
inches long, sessile,
red-brown in color,
armed with a slender
prickle. Maturing
August to September
67. Pinus ponderosa Bark
• Very dark (nearly
black) on young trees,
developing cinnamon-
colored plates and deep
furrows
68. Pinus strobiformis
Southwestern White Pine
• Native to SW United
States, SW corner of
CO, and Mexico.
Foothills to montane.
More drought resistant
than the Eastern White
Pine…..
69. Pinus strobiformis
• Medium sized
straight tree with a
conical crown when
young, later
broader with up
turned branches and
a flat top
74. Pinus strobiformis leaf
• Evergreen needles, 2 to
3 inches long, in
fascicles of 5, finely
serated near tips, thin
bluish-green with
white stomatal lines
only on inner surfaces,
fascicle sheath
deciduous
75. Pinus strobiformis flower
• Monoecious; males
cylindrical, pale yellow
in clusters near branch
tips; females light
green to reddish near Female first year above
ends of branches Second year below
76. Pinus strobiformis bark
• Gray brown and
initially smooth,
becoming furrowed
with scaly rounded,
ridges
77. ID Pinus strobiformis
• 5 needles per bundle. Very soft,
very thin – fine textured tree.
• Open, loose form.
• Cones are 4” – 8” long.
78.
79.
80. Pinus sylvestris
Scots Pine
• A medium-sized tree,
often with a twisted or
poorly formed trunk
(depending on origin
of seed). Young
crowns are rounded.
Older crowns become
round-topped.
86. Pinus sylvestris fruit
• Cones are ovoid, 1 1/2
to 2 1/2 inches long,
yellow-brown in color
and slightly stalked.
The umbo is somewhat
armed, with a blunt
spine. The apophysis
resembles a pyramid.
Maturing September to
October.
87. Pinus sylvestris
• ID Features
– needles have a 360 degree twist
– bark peels to reveal a reddish color at the top of
the tree
– 2 needles per fasicle
– needles have a blue-green appearance
– needles sharp-pointed
