Jack pine rocky ridge (S1)
(formerly jack pine rocky ridge woodland)
Jack pine rocky ridge is a woodland community that occurs at only a few acidic rocky ridges at elevations between 1,800 and 3,900 ft. in the
Jack pine is a rare species in New Hampshire, known only from a dozen or so locations in two regions of the state. Most of these locations consist of a few scattered individual trees, and as such do not constitute examples of this community.
Characteristic Vegetation: Jack pine is abundant in combination with red spruce (Picea rubens), red pine (Pinus resinosa), balsam fir (Abies balsamea), heartleaf birch (Betula papyrifera var. cordifolia), and paper birch (B. papyrifera var. papyrifera). A low heath shrub layer is characterized by lowbush blueberry (Vaccinium angustifolium), velvet-leaf blueberry (V. myrtilloides), and sheep laurel (Kalmia angustifolia). Tall shrubs are generally sparse but may include Bartram’s serviceberry (Amelanchier bartramiana) and witherod (Viburnum nudum). Herbs are relatively sparse, but can locally abundant, and may include common hair-grass (Deschampsia flexuosa), Rand’s goldenrod (Solidago randii), three-toothed cinquefoil (Sibbaldiopsis tridentata), poverty oatgrass (Danthonia spicata), and
Most jack pine cones are serotinous, meaning they require heat to open and release their seed. Non-serotinous cones are also typically present, however, and these may be important for the perpetuation of jack pine stands that burn infrequently.
Good examples of this community occur on Welch Mtn. (Waterville Valley) and Carter Ledge (Albany)
Jack pine rocky ridges sometimes occur as inclusions within larger montane rocky ridge systems.
Jack pine rocky ridge on Mt. Chocorua's Carter Ledge (photo by Ben Kimball)
jack pine rocky ridge community in winter on Welch Mtn. (photo by Ben Kimball)
Jack pine cones in a jack pine rocky ridge community on Welch Mtn.
(photo by Ben Kimball)
jack pine on Welch Mtn. in Waterville Valley (photo by Ben Kimball)
jack pine rocky ridge community on Welch Mtn. (photo by Ben Kimball)
jack pine rocky ridge on Welch Mtn. (photo by Ben Kimball)