Plant Data
Sheet
© Roy Andersen, http://www.royandersenphotography.com/workshops.html
Species:
Rock clematis; Clematis columbiana
Range:
East side of Cascades from
Climate,
elevation: Found in valleys to approximately 2,500 meters. (3)
Local
occurrence: Open woods and talus slopes.
Not abundant. (5)
Habitat
preferences: Dry to moist soils in woods and thickets (3)
Plant
strategy type/successional stage: Vine, twines around
other plants. (5)
Associated
species: Subalpine fir, Beargrass (2)
May be collected as: (seed, layered, divisions, etc.) Seed, Summer softwood stem cutting (2)
Collection
restrictions or guidelines: Flowers bloom
from June to July (1). Collect mature
plumose achenes when they turn brown in late
September and early October(2). Collect cuttings from healthy field plants in
early June (2).
Seed
germination: Outdoor stratification for five months. It must be uncovered, as covered seeds may
not germinate (2).
Seed
life: Two years (2)
Recommended seed storage conditions: No information available.
Propagation
recommendations (plant seeds, vegetative parts, cuttings, etc.): Summer
softwood stem cuttings were effective (2)
Soil
or medium requirements: Deep, moist soil preferred (3)
Installation
form: Plug (2)
Recommended planting density: No information available.
Care
requirements after installed (water weekly, water once etc.): Gradually reduce irrigation prior to installation(2). Plant out in late spring or early summer,
after last expected frosts. (3)
Normal
rate of growth or spread; lifespan:
Probably slow rate of spread as it is not particularly abundant
anywhere. (5)
Sources
cited:
1. Washington Native Plant Society http://www.wnps.org/plants/clematis_columbiana.html
2. Native Plants Network http://www.nativeplantnetwork.org
3. Plants for a Future http://www.pfaf.org/database/plants.php?Clematis+columbiana
4. eFloras.org http://www.efloras.org
5.
Wildflowers of the Pacific Northwest from
Data
compiled by Deborah Brown, April 13, 2006