Taxodium distichum var. distichum
Native to (or naturalized in) Oregon:
- Deciduous conifer, 50-70 ft (15-21 m) tall, 20-30 ft (6-9 m) wide, narrow, pyramidal when young. In swamps it develops a large flares at the base of the trunk, the so-called "cypress knees", which are derived from lateral roots. Leaves needle-like, alternate, 15-20 mm long, linear-lanceolate, 2-ranked, or scale-like and appressed, (the two forms may appear on the same branch or separate trees), soft, mid-vein prominent, yellowish-green above, whitened below, may turn a rich brown in autumn. Cones globular, 1.5-3.5 cm in diam. at ends of previous year's twigs.
- Sun, grows well on deep, fine, sandy loam, acid soil. Very adaptable to wet, dry and well drained soil. The "cypress knees" apparently only develop when grown in or near water for most of the year. Used in bonsai.
Hardy to USDA Zone 4 Native from Delaware to Florida, west to Illinois, Missouri, Arkansas, and Louisiana. Several selections available, including:
- 'Cascade Falls' - tree or shrub, with a pendulous habit
- Green Wispers® - tree, upright pyramidal form, vigorous growth to 55 ft high and 30 ft spread (17 × 9 m)
- Lindsey's Skyward™ - tree, ascending branches, narrow columnar form, 25 ft tall and only 10 ft wide
- 'Peve Minaret' - shurb, dwarf, 8 ft (2.4 m) tall and 4 ft (1.2 m) wide, dense branching; leaves "fern-like"
- 'Secrest' - shrub, dwarf, relatively low and spreading habit, slow growing
- Sometimes used in bonsai
- Taxodium ascendens, Pond Cypress, is similar, but smaller, has shorter needles, and is less cold-hardy than T. distichum. Now the Pond Cypress is commonly designated as a botanical variety of T. distichum, recently as T. distichum var. imbricarium.
- Taxodium: resembles Taxus; distichum: in two ranks (the leaves).
- At the University of Oregon, in Eugene, trees along the Millrace near Franklin Boulevard have small "knees".
- Oregon State Univ. campus: south of Benton Hall.
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