California Polytechnic State University, Robert F. Hoover Herbarium (OBI)
OBI170743
86d7a799-85b5-4424-912b-ad03562699c4
Rorippa palustris (L.) Besser
Brassicaceae
in Weber & Wittmann (2012), keys directly to R. sphaerocarpa in Brassicaceae Key A at couplet 17, then gets lost at couplet 5 in their key to Rorippa, over the question of whether the plant is erect or decumbent; in Ackerfield (2015), keys fairly easily to R. palustris, the only question being whether the stem is hirsute; in Harrington (2nd ed., 1964), keys easily to R. islandica, for which Harrington gives R. palustris as a synonym
Tom Schweich
1938
2018-06-14
2018-6-14
United States, Colorado, Jefferson, Ranson/Edwards Homestead Open Space Park; high plains above Rocky Flats, 1.7 mi. west on CO Highway 72 Coal Creek Canyon Road from CO Highway 93, 1.1 mi. generally north on Plainvew Road, then 305 m. east southeast, 14.90 km north northwest of the GNIS location of Golden
39.8867 -105.2581 WGS84
1925 meters
1925 m
in diverted water; wet habitats
glabrous, small yellow flowers; annual (or short-lived perennial), herb, 45 cm to 50 cm; hairs, mostly glabrous, except few simple hairs on proximal stem, and margins of auricles; roots, tap and fibrous, rooting from proximal nodes; stem, leafy; leaves, cauline, petiole, unclear, blade, 50 mm x 12 mm wide, lyrate-pinnatifid, tips, acute, spinulose, auriculate, auricles, 1.5-2 mm, margin sparsely ciliate; inflorescence, axillary racemes, 35 mm x 7 mm wide; flowers, radial; sepals, #4, 1 row, 0.7 mm, tip, acuminate, color, yellow, glabrous; petals, 0.6 mm x 0.3 mm wide, spoon-shaped, margin, entire, color, yellow; stamens, #6; filaments, color, lavender; fruit, mature, 3 mm x 1.4 mm wide, ovate-oblong, spreading, not inflated, glabrous
collected by permit: Jefferson County Open Space, 2013, issued: Mar 1, 2018, to: Tom Schweich
f9b0b074-f2d6-45d9-876a-8c832328fb0c
For additional information about this specimen, please contact: Jenn Yost, Director and Assistant Professor (jyost@calpoly.edu)
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