[Mountain-trumpets: The Genus Collomia East of
the Cascade Mountains of Oregon and Washington]
Narrowleaf Collomia, Narrow-leaf Collomia
Collomia linearis
The photo above shows narrow-leaf collomia as seen in prairie slopes above Wilson Creek, a BLM site several miles south of US Highway 2 in central Washington.........June 22, 2006.
The photo at right shows a close-up side view of the inflorescence of narrow-leaf collomia as seen in prairie slopes above Wilson Creek, a BLM site several miles south of US Highway 2 in central Washington.........June 22, 2006.
Characteristics:
Narrow-leaf collomia is a simple, single-stemmed annual to 60
cm tall. Occasionally larger plants may have several to many side branches of
the main stem. The leaves are numerous, sessile, entire, and lanceolate or linear
in shape. Individual leaves range in length from 1 to 7 cm long and 1 to 13
mm wide. The broadest leaves are those under the flower clusters.
Each branch of the stem ends in dense, leafy-bracteate cluster
of sessile flowers. Those below are smaller than the uppermost inflorescence.
The corolla is usually pink, blue, or white. The thin tube is about 8 to 15
mm long with the corolla lobes short at 1.5 to 3 mm long.
Habitat:
Narrow-leaf collomia is found from the lowlands to moderate
elevations in the mountains. It is a plant of dry to moderately moist, open
or lightly shade ground.
Range:
A wide ranging plant, narrow-leaf collomia is found from British
Columbia eastward to Ontario and Quebec, and southward to California, Nebraska,
and New Mexico. In the Pacific Northwest, it is found wholly east of the Cascade
crest.
Another view of narrow-leaf collomia as seen from Wilson Creek in central Washington. The view shows a axillary inflorescence forming just below the main inflorescence. Note the numerous gland-tipped hairs.
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The photos above show narrow-leaf collomia as seen from South Jones Prairie along the Blue Mt. Scenic Highway to the southeast of Heppner, OR.........June 22, 2007.
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Both photos above show narrowleaf collomia as seen along the old highway to the southwest of Fishtrap Lake in eastern Washington........June 2, 2008. Click each photo to see an enlarged view.
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Narrowleaf collomia observed at left on Bald Butte which is about 8-10 miles north of Gearhart Mountain, Fremont-Winema National Forest......June 19, 2020. The photo at right shows narrowleaf collomia fading out of bloom along the Fremont National Recreation Trail #160 on the west side of Twelvemile Peak, Fremont-Winema National Forest......July 16, 2022.
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The photo at left shows narrow-leaf collomia as seen from near Hot Springs C.G., Hart Mt. National Antelope Refuge, Lake County, OR.....July 3, 1996. The photo at center shows narrow-leaf collomia as seen along Bond Creek about one-quarter mile south of Hot Springs Camp Ground, Hart Mt. National Antelope Refuge.......June 11, 2016. The photo at right shows narrow-leaf collomia as seen about two miles west of Hot Springs Campground high on the Hart Mt. ridgeline, Hart Mt. National Antelope Refuge........June 9, 2016.
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Narrow-leaf collomia observed in woodlands along spur road 160 about one-quarter of a mile uphill from the junction with Forest Road 41, Umatilla National Forest.....June 17, 2023.
Paul Slichter