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Pinus strobus (eastern white pine)

Like all true pines (species in the genus Pinus), eastern white pine has bundled needles; it is the only species in in its range with needles bundled in groups of 5 (other Midwestern and eastern North American pines have 2 or 3 needles per bundle). The long cones of eastern white pine are also distinctive, since they are substantially longer than the cones of any other eastern or Midwestern conifer except Norway spruce, which is not native but is often planted in urban areas. However, the short needles of Norway spruce are not bundled, making the trees easy to separate.

The classic mushroom finds in eastern white pine forests, for me anyway, are Amanita muscaria guessowii, Lactarius chelidonium, Lactarius vinaceorufescens, Phaeolus schweinitzii, Suillus americanus, and Suillus weaverae. However, many other mushrooms are also common in association with eastern white pine: Clitocybe hygrophoroides; species of Cortinarius; Gymnopus dryophilus; Hydnellum species; Laccaria ochropurpurea; Lactarius deliciosus var. deterrimus; Marasmius pulcherripes; Mycena clavicularis; Peziza badioconfusa; Phellodon alboniger; various Russula species (including Russula cessans and Russula sororia); Suillus luteus, Suillus pictus, Suillus placidus, Suillus punctipes), Tricholoma species 04, and many others.

 

Range of Pinus strobus

Pinus strobus
young, untended trees are dense with branches

 

Pinus strobus
mature trees, when unimpeded, have a spreading stature

 

Pinus strobus
roots of a very old specimen in northern Michigan


Pinus strobus
needles are 2—4 inches long, flexible, in bundles of 5


Pinus strobus
young seed (female) cones are green and tightly closed . . .

 

Pinus strobus
. . . becoming brown and, eventually . . .

Pinus strobus
. . . opening up between scales; cones are 4–8 inches long


Pinus strobus
needle duff under white pines can be quite thick


Pinus strobus
pollen (male) cones are small and yellowish

 

Pinus strobus
pollen cones on branch tips


male cones releasing pollen


Pinus strobus
young bark is smooth and nearly white

 

Pinus strobus
maturing bark becomes gray

 

Pinus strobus
mature bark is platelike and grayish brown




Kuo, Michael (November, 2021). Pinus strobus (eastern white pine). Retrieved from the MushroomExpert.com website: www.mushroomexpert.com/trees/pinus_strobus.html

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