Cannon, Helen Leighton

163 items:

Mentzelia multiflora (Desert blazingstar), Colorado Plateau, Colorado. 1954. Mentzelia multiflora (Desert blazingstar), Colorado Plateau. May 1954. Categories: Image; Tags: Cannon, Helen Leighton Collection, Photographers, photo print
Eriogonum ovalifolium (Silver plant or cushion eriogonum), Colorado Plateau, Colorado. 1954. Eriogonum ovalifolium (Silver plant or cushion eriogonum). Colorado Plateau. June 1954. Published in U.S.Geological Survey Bulletin 1030-M, figure 121. 1957. Categories: Image; Tags: Cannon, Helen Leighton Collection, Photographers, photo print
Oenothera caespitosa (Tufted evening-primrose), Colorado Plateau, Colorado. 1952. Oenothera caespitosa (Tufted evening-primrose). Colorado Plateau. May 1952. Published in U.S.Geological Survey Bulletin 1030-M, figure 113. 1957. Categories: Image; Tags: Cannon, Helen Leighton Collection, Photographers, photo print
Aplopappus armeriodes (Goldenweed), Colorado Plateau, Colorado. 1950. Aplopappus armeriodes (Goldenweed). In bud. Colorado Plateau. May 1950. Categories: Image; Tags: Cannon, Helen Leighton Collection, Photographers, photo print
Astragalus aculeatus A. Neis. Album Caption: Astragalus aculeatus A. Nels. Family : Pea, Legnminosae. Subgenus: Kentrophyta. Flowers : Irregular, small purple pea-shaped flowers about 4 mm long, in axils of leaves, Blooms in July. Leaves : Pinnate, with 5 stiff spine-tipped leaflets 1/2 inch long. Fruit : Pods with 2 prominent sutures 1-celled, ovoid, 1/8 inch long. Plant : Perennial, with strong taproot, branches sprawling or erect, so densely covered with prickly leaves as to appear clublike. Published in U.S.Geological Survey Bulletin 1030-M, figure 94. 1957. Categories: Image; Tags: Cannon, Helen Leighton Collection, Photographers, photo print

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