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Ivesia gordonii var. gordonii (Ivesia) Rosaceae (Rose Family) Montane, subalpine, alpine. Meadows, rocky areas. Summer. From its thick, woody caudex, which is clothed with persistent leaf bases and last year's leaves, Ivesia gordonii produces numerous, often vertical leaves and many flowering stems supporting showy clusters of flowers. Ivesia gordonii grows from 6-12 inches tall in showy clusters 4-8 inches in diameter. In the photograph immediately below, you can see that small green bracts lay behind triangular yellow to yellow-green sepals which alternate with very narrow yellow to yellow-green petals. Although Ivesia gordonii is found at low montane elevations in some of its range, it is more often found in sub-alpine and alpine settings and, in fact, is sometimes called "Alpine Ivesia". The photographs showing Ivesia plants on rock pavement at just 8,000 feet in a Ponderosa and Oak community are a Dolores County, Colorado record. Ivesia gordonii was named by Torrey and Gray in 1858 after it had first been named Horkelia gordonii by Hooker in 1853. Eli Ives was a Yale University pharmacologist and professor, and Alexander Gordon collected the first specimens of Ivesia gordonii for science along the upper Platte River in 1844. (Click for more biographical information about Ives.) (Click for more biographical information about Gordon.) |
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Ivesia gordonii var. gordonii (Ivesia) Rosaceae (Rose Family) Montane, subalpine, alpine. Meadows, rocky areas. Summer. Ivesia gordonii stems are often white hairy and/or glandular-hairy. Pinnate leaves, which can vary from 3-24 cm long, have numerous rounded leaflets which vary from 10-25 pairs and are 2-17 mm long. The leaves and leaflets at left approach the longer measurements; the leaves in the photograph immediately above left approach the shorter measurements. |
Range map © John Kartesz, County Color Key
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Range map for Ivesia gordonii |