Landscape Plant Recognition Plant Descriptions Field Day #5

Transcription

1 Morella californica (MYRICACEAE) myrtle or wax myrtle West Coast of N. America, Simple Leaves extend from all sides of branch Lanceolate to oblonglanceolate ~ crenate-serrate Waxy leaves Infl rounded clusters, Red when young Females on upper portion of reproductive stalk Hairy stigmas Males on lower portion w/stamens partly enclosed by bract. Females with short style enclosed by bract. Winged nutlets in brown, cone-like spikes Thinly coated with wax Clustered below leaves shrub Grows well in sandy soil Previously: Myrica californica Osmanthus delavayi (OLEACEAE) W. China Opposite Ovate to elliptic-ovate Less than 1 in long Acute tip Sharply serrulate Gland dotted below Infl 4-8 flowered raceme Radial 4-merous, Stamens 2 Short-stalked Fragrant Petals white, trumpet shaped Bluish-black ovoid shaped drupe shrub to 6 ft Scented flowers Good species for hedges Osmanthus means scented flowers Phyllostachys nigra (POACEAE) black-stemmed bamboo E. and Central China Leaves green above and whitish below Lanceolate Nodes w/2 rings, nodes edged with white below Spikelets w/ many florets Petals, sepals greatly reduced (lodicules) Stamens 3 Many bamboo species are monocarpic they flower once after many years of growth then die Caryopsis (grain) Rhizomatous and can quickly spread if not contained Young shoots, sheaths w/ hair Stems green at first, then speckled, then black, to 25 ft "Phyllo" = leaf, "stachys" = spikelet of the flowers, "nigra" = black Page 1 of 6

2 Corokia cotoneaster (ARGOPHYLLACEAE) wire netting bush New Zealand Simple Small and orbicular, ½ to 1 long Sparsely foliaged Above-Glabrous dark maroongreen to bronze Yellow, stellate ½ diameter solitary flowers 5 petals and stamens Perfect Slightly fragrant 1/4 to 1/3 diameter oblong to round orange drupe. Shrub- Slow growing up to 5-8 high and wide. Usually found as 2-4 container plant. Contorted intertwined branches Grown for zigzag branching habit Below-pubescence Akebia quinata (LARDIZABALACEAE) chocolate vine C. China, Korea, Japan Palmately compound (5-leaflets) Leaflets have petioles Lflts elliptical to ovate 1½ - 3 inches long, usually green (blue-green) when mature Emarginate apex Most often chocolate-purple colored (~ white, red) Often concealed by foliage unisexual, monoecious Female flowers larger w/long stalks and thick styles Male flowers in clusters, smaller w/6-8 stamens Sausage-like pods, flattened Purple in long Twining woody vine or ground cover Deciduous (evergreen in warm climates) Rounded stems Green when young, then brown Flowers fragrant White flowered cultivar at CUH quinata =5, refers to the five leaflets Page 2 of 6

3 Weigela (CAPRIFOLIACEAE) N. China, Korea Opposite Serrate Pubescent Short petiole Infl - compound corymbs Abundant flowers Radial, perfect Corolla tubular to bellshaped 5 lobed, lobes often unequal but not 2-lipped Stamens 5, Style 1, with large stigma on a thin style Capsule 2-valved Deciduous shrub Arching branches Weigela from a German botanist's name Umbellularia californica (LAURACEAE) California laurel or Oregon myrtle S. Oregon, N. California, Simple Pinnate venation Entire Ovate to lanceolate 2-6 inches long, 1 wide Upper-glossy green "camphor" odor Infl Umbel-like Yellowish-green 3 parted 6 petals 9 stamens Drupe Ovoid ~1 in. long Yellowish-green to purple Looks like olive Pedicel of fruit looks like a golf tee. Tree to 100 ft or shrub Smells like a bay leaf but much harsher, sometimes sold as a bay leaf but is very inferior Can easily self-seed and pop up in other areas of the landscape close by. Page 3 of 6

4 Garrya x issaquahensis (GARRYACEAE) silk-tassel bush Garden Origin Opposite, Simple Elliptic to elliptic-oblong 2-3 in. long Base rounded Stout petioles ( in. long) Leathery Margin undulate Some pubescence underneath Infl Pendulous racemes (catkin-like) Infl. deep mauve when fresh, longer than those of parents Imperfect Dioecious Males have longer, more pendulous inflorescence Flowers inside cup-shaped bracts. No sepals, small petals Stamens 4 Female 2 styles Dasiphora fruticosa (ROSACEAE) bush cinquefoil Europe, N. Asia, N. America Pinnately compound 3-7 leaflets (usually 5) Elliptic to linear Revolute margins Leaflets sessile Long pubescence on both sides of leaf Blue to dark green Solitary, Perfect 1 1 ½ across 5-parted, many stamens Many styles Yellow (~ white or orange) Sepal reddish & green Dry achenes covered w/long hairs Microbiota decussata (CUPRESSACEAE) Russian arborvitae Russia Scale-like, feathery Branchlets in flattened sprays Foliage is evergreen, but winter foliage is purplebronze and "greens up" in the spring Drooping shoot tips Monoecious Uncommon Shrub 6-12 ft tall Cross between G. elliptica and G. fremontii that occurred in a garden in Issaquah Small deciduous shrub, 1-4 tall Many branches densely twiggy Alpine plant Branches exfoliate with age Found in northern latitudes around the world Several cultivars developed Formerly in Potentilla Low growing spreading conifer, with an appearance similar to the low growing junipers Height of ~ 12" Can spread to at least 10' wide Although tolerant of partial shade, looks at its best in full sun Page 4 of 6

5 Amelanchier (ROSACEAE) serviceberry Europe, Asia, N. America, Simple Finely serrate ~ ovate or rounded Lvs red in fall Small deciduous stipules Infl terminal raceme White Sepals 5, fused at base, w/small teeth Petals 5, narrow Stamens Styles 2-5 Small pome Black or red Deciduous trees or shrubs to 30 ft Delicately branching Fruits ferment on the shrub, birds like! Native species: Amelanchier alnifolia Lonicera involucrata (CAPRIFOLIACEAE) black twinberry or bearberry honeysuckle Western United States Opposite Elliptic-ovate 2-5 in. long ~ pubescent underneath Fls erect, tubular w/5 lobes ¼ - ¾ in long Corolla not 2 lipped Yellow or tinged w/red Pubescent In pairs cupped by large greenish-purplish bract Berries 2 -shiny black w/ 2 pairs of purple-maroon bracts Erect to straggly shrub to 10 ft Stems greenish Best in moist sites involucrata: reference to the two bracts subtending the pair of flowers/fruits Good hummingbird plant Rubus spectabilis (ROSACEAE) salmonberry W. North America Ternately compound Terminal leaflet stalked and largest Doubly serrate Solitary Fls Pink, purplish red Petals delicate Nodding Many pistils Aggregate of drupelets, ranging in color from salmon to red Salmon berry salmon colored to pink when ripe Rhizomatous shrub, can be aggressive Deciduous Peeling bark on older stems, slender thorns on younger Hummingbird pollinated Page 5 of 6

6 Hebe (PLANTAGINACEAE) Mainly New Zealand, S.E. Australia Strongly opposite, decussate ~ Entire sometimes scale-like Infl upright dense spike-like heads in leaf axils 4-lobed (~3-5 parted) Stamens 2, exserted, one style White, purple Capsules w/ 2-cells and many small seeds Shrubs or trees, often very small Branches w/ conspicuous leaf scars Smaller leaved cvs hardier Moved to Veronica and back to Hebe Cordyline australis (ASPARAGACEAE) cabbage tree New Zealand, Australia Sword shaped Very long (2-3 ft), narrow Leaves in tufts on ends of trunk Small flowers on large, upright, branching inflorescence Sepals & petals similar, 6, fused at base White, waxy Small, fleshy, white berries with multiple seeds Tree w/ single trunk to 30 ft Looks something like a palm tree with skinny leaves Best protected in winter Also red cultivars, which are less hardy Cordyline translates to "clublike" - refers to fleshy roots Page 6 of 6