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(Black Spruce, Dwarf Black Spruce)
The dwarf black spruce, 'Nana' is a very slow-growing evergreen shrub that becomes a broad ball when mature. It is a native of northern North America, from Alaska to the northernmost reaches of the United States. This is a boreal tree species that is best in cool, moist soils.
The short needles of 'Nana' are four-sided and silvery blue-green to plain green.
Grow dwarf black spruce in full sun and neutral to acidic soil that is rich and friable but has good drainage. Amazingly cold tolerant...
James H. Schutte
(Quaking Aspen)
Named for its tremulous leaves which flutter in the breeze to reveal their pale undersides, quaking aspen is an upright, fast-growing, relatively short-lived deciduous tree native to North America. The gray-green to whitish bark and yellow fall foliage are attractive.
Quaking aspen needs full sun and accepts almost any soil. Aspens have extensive, aggressive, suckering surface roots that can invade nearby plantings, infiltrate and damage drainage systems, and heave pavement. This tree is best...
(Lanceleaf Cottonwood)
This deciduous tree is believed to be a naturally occurring hybrid of two or three cottonwood species native to the western U.S. Its range is limited to a strip of states that covers the Rockies from Canada to the Texas, but at higher elevations than other cottonwoods. This hybrid grows beside streams, in riverine habitats, and in wetland fringes, sites where it thrives on ground water. Its extensive, fibrous roots help to hold stream banks during periods of high water. The leaves are narrow, and...
(Red Sorrel, Sheep Sorrel, Sour Weed)
A familiar weed of waste places and gardens, this creeping herbaceous perennial originated in Eurasia but is naturalized worldwide.
The small, smooth, arrowhead-shaped leaves of this hardy perennial are borne in rosettes. Plants spread via threadlike underground rhizomes to form large colonies. The leaves contain sour-tasting oxalates that render them unpalatable (and potentially toxic) to cattle. Spikes of insignificant flowers appear on short, upright stalks from spring to late summer. Plants...
(Alpine Blue-eyed Grass)
Though it resembles a grass with its clump of strappy leaves, alpine blue-eyed grass is actually related to irises, a link visible in its flowers. An unassuming herbaceous perennial, it is native to the cool-summer meadows and moist soils of northern North America from the Canadian and American Rocky Mountains eastward to the Great Lakes and Newfoundland.
The strap-like, thin leaves are green and rather short, held in a small cluster. In midsummer, slightly taller stems reach above the leaves...
