Cornus canadensis
| Cornus canadensis | |
|---|---|
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| Growing at Elfin Lakes, British Columbia | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Cornales |
| Family: | Cornaceae |
| Genus: | Cornus |
| Subgenus: | Chamaepericlymenum |
| Species: | C. canadensis |
| Binomial name | |
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Cornus canadensis L. |
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Cornus canadensis (Canadian dwarf cornel, Canadian bunchberry, quatre-temps, crackerberry, creeping dogwood) is a species of flowering plant in the Cornaceae (dogwood) family, native to eastern Asia (Japan, Korea, northeastern China (Jilin Province) and the Russian Far East), northern United States, Colorado, New Mexico, Canada and Greenland. Unlike its relatives, which are for the most part substantial trees and shrubs, C. canadensis is a creeping, rhizomatous perennial growing to about 20 cm (8 in) tall.
Cornus canadensis is a slow-growing herbaceous subshrub growing 10–20 cm tall, generally forming a carpet-like mat. The above-ground shoots rise from slender creeping rhizomes that are placed 2.5–7.5 cm deep in the soil, and form clonal colonies under trees. The vertically produced above-ground stems are slender and unbranched. The leaves are oppositely arranged on the stem, but are clustered with six leaves that often seem to be in a whorl because the internodes are compressed. The leafy green leaves are produced near the terminal node and consist of two types: 2 larger and 4 smaller leaves. The smaller leaves develop from the axillary buds of the larger leaves. The shiny dark green leaves have 2 to 3 mm long petioles and leaf blades that are obovate. The blades have entire margins and are 3.5 to 4.8 cm long and 1.5 to 2.5 cm wide, with 2 or 3 veins and cuneate shaped bases and abruptly acuminate apexes. In the fall, the leaves have red tinted veins and turn completely red.
In late spring to midsummer, white flowers are produced that are 2 mm (0.079 in) in diameter with reflexed petals that are ovate-lanceolate in shape and 1.5–2 cm (0.59–0.79 in) long. Inflorescences are made up of compound terminal cymes, with large showy white bracts. The bracts are broadly ovate and 0.8 to 1.2 cm long and 0.5 to 1.1 cm wide, with 7 parallel running veins. The lower nodes on the stem have greatly reduced rudimentary leaves. The calyx tube is obovate in shape and 1 mm long covered with densely pubescent hairs along with grayish white appressed trichomes. Stamens are very short, being 1 mm long. The anthers are yellowish white in color, narrowly ovoid in shape. The styles are 1 mm long and glabrous. Plants are for the most part self-sterile and dependent on pollinators for sexual reproduction. Pollinators include bumblebees, solitary bees, beeflies, and syrphid flies. The fruits look like berries but are drupes.
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Wikipedia