Alnus rhombifolia is a medium-sized deciduous tree growing to 49-82 ft rarely to 115 ft tall, with pale gray bark, smooth on young trees, becoming scaly on old trees.
The flowers are produced in catkins. The male catkins are pendulous, yellowish, and produced in clusters of two to seven; pollination is in early spring, before the leaves emerge. The female catkins are ovoid, when mature in autumn and resemble a small conifer cone. The small winged seeds disperse through the winter, leaving the old woody, blackish ‘cones’ on the tree for up to a year after.
The White Alder is closely related to the Red Alder (Alnus rubra), differing in the leaf margins being flat, not curled under. Like other alders, it is able to fix nitrogen atmospheric nitrogen, and tolerates infertile soils.
If used domestically they should be planted well away from drainpipes, sewage pipes, and water lines, as the roots may well invade and clog the lines. These fast-growing trees often grow 3 ft. per year until 20 years of age. They are a relatively short lived species compared to other PNW native tree species.
Oceanspray is native to western North America, most commonly found in the mountains of the Pacific Northwest. This fast-growing deciduous shrub gets 8-10′ tall and 3-7′ wide. Its small toothed leaves are 2-4 inches long. Cascading clusters of white flowers drooping from the branches give the plant two of its common names, oceanspray and creambush. The flowers have a faint sugary scent, and each one bears a small, hairy fruit containing one seed which is light enough to be dispersed by wind.
Oceanspray is found in a variety of habitats, from wet coastal forests to drier, cooler mountain peaks further inland. It often grows in areas dominated by Douglas-fir. The plant is found in areas prone to wildfire, such as chaparral communities. It is often the first green shoot to spring up in an area recovering from a burn or logging.
Many small solitary bees, bumblebees, and native butterflies visit this plant for nectar. It can also be considered a pollinator “nursery”, as pale swallowtail, spring azure, Lorquin’s admiral, and brown elfin butterflies all lay their eggs on it.
These attractive shrubs thrive on dry slopes in sun to part-sun, and spread well in favorable conditions. Long-leaf Oregon grape and salal do well in their shade, and they pair well with hazelnut to make a woodland border. Combine with red-flowering currant or vine maple for a deciduous screen.
Light Requirements: Full Sun, Part Shade, Full Shade
Water Requirements: Dry, Moist
Ease of Growing: Easy to grow
Growth Rate: Fast
Spreads: Yes
Wildlife Support: Pollinators, Pest-eating Insects, Birds or Mammals
Douglas fir is one of the most common evergreen trees in the our region. It grows fast and can tolerate many soil types. This is a good tree to plant in groups as a windbreak, or at the edge of wooded areas, as it needs plenty of space.
The bark is thin, smooth, and gray on young trees, and thick and corky on older trees. The needle-like leaves are spirally arranged and 2-3.5 cm long, and a bud at the tip of most branches distinguishes it from other evergreens. Douglas fir foliage has a noticeable sweet fruity-resinous scent, particularly if crushed. The 2-4 inch long cones are green in spring, maturing to orange-brown in the autumn 6-7 months later. The male cones disperse yellow pollen in spring.
Many kinds of wildlife depend on Douglas fir for winter forage. Mice, voles, shrews, chipmunks, pine siskins, song sparrows, golden-crowned sparrows, white-crowned sparrows, red crossbills, dark-eyed juncos, and purple finches all eat the abundant seeds. Black-tailed deer and elk will eat the seeds late in winter when other forage is scarce. The Douglas squirrel harvests and caches great quantities of Douglas fir cones for later use, and the squirrels will also eat mature pollen cones, the inner bark, terminal shoots, and tender young needles.
Fun facts: Douglas fir (Pseudotsuga menziesii) is neither a true fir, nor is it a hemlock (hence the Latin name, *Pseudo*tsuga). It is its own genus altogether. It is also the second-tallest evergreen in the world after the Coast Redwood. Trees 200-250 feet or more in height and 5-6 feet in diameter are common in old growth stands, and heights of 300-400 feet were reported by early lumbermen. It commonly lives more than 500 years and occasionally more than 1,000 years.
Red flowering currant (Ribes sanguineum) is an upright, multi-stemmed deciduous shrub that can get 6-10 feet tall, and is considered one of our prettiest native shrubs. Its bright pink, dangling flower clusters in late February and March are welcome signs of spring!
The bark is dark brownish-grey with pale brown lenticels. The palmate leaves have five lobes, and young leaves and flowers have a scent variously described as spicy or resinous. The fruits form as clusters of dark purple berries which contrast beautifully with the rosy gold fall foliage.
Keep a pair of binoculars handy if you plant this lovely shrub, because red flowering currant is a favorite of hummingbirds and other wildlife all year long. The flowers are important early spring nectar sources for rufous and Anna’s hummingbirds, spring azure and mourning cloak butterflies, and many native bees. Many birds eat the berries in the fall and winter, including towhees, thrushes, cedar waxwings, and sparrows. This charming plant also hosts the eggs of zephyr butterflies, and provides shelter for songbirds.
Red flowering currant can tolerate shade, but grows best (and blooms the most) in sunny locations with well drained soils.
Light Requirements: Full Sun, Part Shade
Water Requirements: Dry, Moist
Ease of Growing: Easy to grow
Growth Rate: Fast
Spreads:
Wildlife Support: Pollinators, Hummingbirds, Pest-eating Insects, Birds or Mammals
Polystichum munitum (Western Sword Fern) is an evergreen fern native to western North America, where it is one of the most abundant ferns occurring along the Pacific coast from southeast Alaska south to southern California, and also inland east to southeastern British Columbia, northern Idaho and western Montana, with isolated populations in interior northern British Columbia, the Black Hills in South Dakota, and on Guadalupe Island off Baja California.
The dark green fronds of this fern grow to 50-180 cm tall, in a tight clump spreading out radially from a round base. They are single-pinnate, with the pinnae alternating on the stalk. Each pinna is 1-15 cm long, with a small upward-pointing lobe at the base, and the edges are serrated with bristly tips. Individual fronds live for 1.5-2.5 years and remain attached to the rhizome after withering. The round sori occupy two rows on either side of the midrib of each pinna and are covered by a centrally-attached, umbrella-like indusium with fringed edges. They produce light yellow spores.
The favored habitat of this fern is the understory of moist coniferous forests at low elevations. It grows best in a well-drained acidic soil of rich humus and small stones. Sword ferns are very tough, and can survive occasional dry periods once established.
While this fern is a favored horticultural subject in western North America, it has been found to be difficult or impossible to grow satisfactorily in the eastern part of the continent.
Grand fir (Abies grandis) is a shade tolerant, slow-growing evergreen tree with short, dense branches. It can get quite tall in the wild, reaching 250 feet in height and with a trunk diameter of up to 6 feet.
The glossy dark green leaves are needle-like, 3-6 cm long, and extend flat out from the branch on either side. The 6-12 cm cones do not fall to the ground whole, but disintegrate on the tree and release their seeds about 6 months after pollination.
Grand fir is an important wildlife tree. The California tortoiseshell butterfly feeds on the sap and secretions from cones and needles. Grouse eat the needles, and nuthatches, chickadees, and squirrels eat the seeds. Grand firs also provide excellent cover and nesting habitat for birds and small mammals.
The foliage has an attractive tangerine-like scent, and Grand Firs are sometimes used for Christmas decoration, including as Christmas trees. It is also planted as an ornamental tree in large parks.
Grand fir needs well-drained soils and plenty of room to grow, and is an elegant addition to any landscape.
Light Requirements: Full Sun, Part Shade, Full Shade
Water Requirements: Moist, Seasonally Wet
Ease of Growing: Easy to grow
Growth Rate: Moderate
Spreads: No
Wildlife Support: Hummingbirds, Pest-eating Insects, Birds or Mammals
The Nootka rose is an attractive shrub growing up to 9′ high. The straight, erect stems are usually green, but occasionally may be reddish. The prickles are larger and thicker than those of the other native rose species.
The leaves are alternate on the stems and pinnately compound with 5-7 leaflets, dark green above, paler and slightly hairy below. The leaflets are elliptic or ovate in shape with serrate margins, and range from 1-7 cm long and 0.7-4.5 cm wide.
The sweet-scented, pink flowers are usually solitary, occasionally growing in groups of 2 or 3. They are large and showy, ranging from 5-8 cm across. Individual petals are 2.5-4 cm long, and 5 petals are the norm for the flowers. The rose hips are spherical, orange-red and large, ranging from 1-2 cm wide.
Uses
Wild rose is spindly and tends to form loose thickets, which in large spaces makes it useful as a hedgerow or as a wildlife-friendly ornamental. The leaves and fruits are important food sources for herbivores and upland game birds, and rose thickets provide excellent nesting and escape habitat for songbirds. The plant also has many traditional uses in Native American culture. Rose hips can be made into jam, tea, and used as flavoring, and the leaves have a variety of medicinal uses. Dried flower petals are used for scents and potpourri.
Habitat
Nootka rose may be found in open upland woods or in open shrub wetlands. In areas where both Rosa nutkana and Rosa woodsii occur, the former may be found at higher elevations and often in woods.
Light Requirements: Full Sun, Part Shade
Water Requirements: Dry, Moist, Seasonally Wet
Ease of Growing: Easy to grow
Growth Rate: Moderate
Spreads: Yes
Wildlife Support: Pollinators, Pest-eating Insects, Birds or Mammals
