[The Pea Family in the Columbia River Gorge of Oregon and Washington]
Common Thermopsis, Golden Pea, Hitchcock's Thermopsis, Mountain Golden-banner, Mountain Thermopsis, Slender Goldenbaner, Slender Golden-banner
Thermopsis montana var. ovata
Synonyms: Thermopsis gracilis var. ovata, Thermopsis macrophylla, Thermopsis macrophylla var. hitchcockii, Thermopsis montana var. hitchcockii, Thermopsis montana var. ovata, Thermopsis rhombifolia var. ovata
The photo above shows a close-up sideview of the flower of golden pea (variety ovatum) as seen along Balloon Tree Road, Umatilla National Forest ........June 27, 2006.
The photo at right shows a close-up frontal view of the flower of golden pea (variety ovatum) as seen along Balloon Tree Road, Umatilla National Forest ........June 27, 2006.
Characteristics:
Golden pea is an attractive perennial wildflower with several
erect stems from 40-100 cm in height. The leaves are alternately arranged along
the stems and are pinnately compound with the leaflets linear-elliptic to broadly
ovate-elliptic in shape, and 5-10 cm long. The plant varies in hairiness overall,
from nearly glabrous to densely pubescent. The upper surface of the leaflets
typically is glabrous while the underside is copiously covered with appressed
hairs. The stipules are also variable in length, ranging from very small to
nearly the length of the leaflets.
The flowers are yellow, 20 to 25 mm long, borne in small to
long racemes as much as 30 cm long. Five to fifty flowers may make up the inflorescence.
The pedicels are slightly shorter than to equal in length with the calyx. The
calyx is thinly to densely haired and measures 9-10 mm long with teeth that
are slightly shorter than the calyx tube. The pods are erect to somewhat spreading,
straight, somewhat hairy and two to five seeded. They measure 7-8 cm long and
about 7 mm wide.
Habitat:
Golden pea is found on sandy, well-drained soil to wet meadows.
Range:
Golden pea is found from British Columbia south to California,
and from the Pacific coast eastward to the Rocky Mountains of Montana and Colorado.
In the Columbia River Gorge, it may be found between the elevations
of 400'-4300' from Silver Star Mt. in the west eastward to the upper drainage
of the Washougal River.
The photo above shows a close-up sideview of the flower of golden pea (variety ovatum) as seen along Balloon Tree Road, Umatilla National Forest ........June 27, 2006.
The photo above shows a close-up of the broad, ovate-shaped leaflets of golden pea as seen along Balloon Tree Road, Umatilla National Forest........June 27, 2006. Note the broad stipules at the base of the leaf petiole (bottom center of the photo).
The photo above shows golden pea as seen along Balloon Tree Road, Umatilla National Forest.......June 27, 2006.
The photo above shows another view of the trifoliate leaf of golden pea as seen at Silver Star Mt, NE of Camas, WA............7/04/91.
Paul Slichter