Pinus resinosa Aiton
Red pine
Red pines are native to northeastern North America. They live for 200-400 years. I am perplexed by the spherical bulges on the shrub-sized pine in photo 20.
Plants: These trees typically reach 50–70′ (15–21 m) tall, sometimes up to 200′ (60 m). Bark is rough and scaly and silvery gray, peeling easily to reveal orange-red or brown bark underneath.
Leaves: Needles are 4–7″ (10–17 cm) long, medium green, occurring in groups of two. Needles snap easily when bent, an identifying feature
Fruits: Cones are light brown, oval in shape, about 2″ (5 cm) long, occurring singly or in pairs.
Habitats: Hills, slopes, ridges and plains, often in sandy soils.
For further information, see the Pinus comparison tables.
Online References:
References:
1 · 9/10/2016 · Arlington St., Groton, Massachusetts 
2 · 9/20/2009 · Acadia National Park, Bar Harbor, Maine · ≈ 9 × 6″ (23 × 15 cm) 
ID is uncertain 
3 · 9/20/2009 · Acadia National Park, Bar Harbor, Maine · ≈ 7 × 4½″ (17 × 11 cm) ID is uncertain 
4 · 9/10/2016 · Arlington St., Groton, Massachusetts 
5 · 7/2/2010 · Mt Vernon Trail, along Potomac River · ≈ 4½ × 3½′ (1.4 × 1 m) ID is uncertain 
6 · 9/16/2016 · Cadillac Mountain South Ridge Trail, Bar Harbor, Maine 
7 · 7/2/2010 · Mt Vernon Trail, along Potomac River · ≈ 6½ × 4′ (2.0 × 1.3 m) ID is uncertain 
8 · 9/16/2016 · Cadillac Mountain South Ridge Trail, Bar Harbor, Maine 
9 · 7/17/2010 · Mackworth Island, Falmouth, Maine 
10 · 9/17/2016 · Mount Desert Island, Bar Harbor, Maine 
11 · 9/17/2016 · Mount Desert Island, Bar Harbor, Maine · ≈ 15 × 10″ (39 × 26 cm) 
12 · 4/3/2010 · Mt. Battie (Elev. 780'), Camden, Maine ID is uncertain 
13 · 6/9/2016 · Monhegan Island, Maine 
14 · 4/24/2021 · Green Point, Kennebec Estuary Land Trust, West Bath, Maine 
15 · 9/29/2013 · North Bubble Hike, Acadia National Park, Bar Harbor, Maine 
16 · 6/12/2010 · Nashua River Rail Trail, East Pepperell, Massachusetts · ≈ 6 × 3½″ (14 × 9.4 cm) 
17 · 6/12/2010 · Nashua River Rail Trail, East Pepperell, Massachusetts · ≈ 4½ × 3″ (11 × 7.5 cm) 
18 · 6/12/2010 · Nashua River Rail Trail, East Pepperell, Massachusetts · ≈ 3½ × 6″ (9.4 × 14 cm) 
19 · 6/12/2010 · Nashua River Rail Trail, East Pepperell, Massachusetts · ≈ 5 × 3″ (12 × 8.4 cm) 
20 · The round swelling is pine-pine gall rust, Endocronartium harknessii. · 4/3/2010 · Mt. Battie (Elev. 780'), Camden, Maine · ≈ 15 × 10″ (39 × 26 cm) ID is uncertain 
21 · 9/20/2009 · Acadia National Park, Bar Harbor, Maine · ≈ 6 × 4″ (15 × 10 cm) ID is uncertain 
22 · The round swelling is pine-pine gall rust, Endocronartium harknessii. · 4/3/2010 · Mt. Battie (Elev. 780'), Camden, Maine · ≈ 17 × 12″ (44 × 29 cm) ID is uncertain 
23 · 5/15/2016 · Mt. Watatic, Ashby, Massachusetts · ≈ 1½ × 1′ (52 × 34 cm) 
24 · 12/11/2011 · Nashua River Rail Trail, Groton, Groton, Massachusetts · ≈ 6 × 4½″ (16 × 11 cm) 
25 · 9/16/2016 · Cadillac Mountain South Ridge Trail, Bar Harbor, Maine 
26 · 9/29/2013 · North Bubble Hike, Acadia National Park, Bar Harbor, Maine 
27 · 5/15/2016 · Mt. Watatic, Ashby, Massachusetts 
28 · 9/29/2013 · North Bubble Hike, Acadia National Park, Bar Harbor, Maine 
29 · 6/9/2016 · Monhegan Island, Maine 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Coniferophyta | Conifers—cone-bearing trees (and a few shrubs) |
| Class | Pinopsida | Gymnosperms such as cedars, Douglas-firs, cypresses, firs, junipers, kauri, larches, pines, hemlocks, redwoods, spruces, and yews |
| Order | Pinales | Cone-bearing plants: cedar, cypress, fir, juniper, larch, pine, redwood, spruce, yew, and others |
| Family | Pinaceae | Pine family: cedars, firs, hemlocks, larches, pines and spruces |
| Genus | Pinus | Latin for “pine” |
| Species | resinosa | "Resin-producing" (from Stearn's Botanical Latin) |
Pinus resinosa description by Thomas H. Kent, not updated.
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