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Euthamia occidentalis authority>Nutt.
WESTERN GOLDENTOP
Life   Plantae   Dicotyledoneae   Asteraceae   Euthamia


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Associates · map
FamilyScientific name @ source (records)
Andrenidae  Andrena aurihirta @ UCRC_ENT (5)

Andrena citrinihirta @ UCRC_ENT (3)

Perdita ciliata @ UCRC_ENT (1)

Perdita interserta @ UCRC_ENT (56)
Apidae  Melissodes lutulenta @ AMNH_BEE (2)

Melissodes paulula @ AMNH_BEE (2)
Colletidae  Hylaeus leptocephala @ UCRC_ENT (1)

Hylaeus mesillae @ UCRC_ENT (2)

Hylaeus polifolii @ UCRC_ENT (2)
Ichneumonidae  Nothocremastus intermedius @ UCRC_ENT (1)
Megachilidae  Megachile gentilis @ UCRC_ENT (1)

Megachile perihirta @ UCRC_ENT (1)

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FNA | Family List | FNA Vol. 20 | Asteraceae | Euthamia

5. Euthamia occidentalis Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 326. 1840.

Western goldentop

Euthamia californica Gandoger; E. linearifolia Gandoger; Solidago occidentalis (Nuttall) Torrey & A. Gray

Perennials or subshrubs, 40—200 cm. Stems (erect, stout) glabrous, glaucous. Leaves spreading-ascending to erect; blades 3- or -5-nerved, linear, 82—100 × 4.3—10 mm, lengths 10—27 times widths, gradually to abruptly reduced distally, herbaceous to firm-herbaceous, margins scabrous, apices abruptly acute to acuminate, faces ± gland-dotted (18—56 dots per mm²), adaxial and vein axils often sparsely hairy. Heads mostly pedunculate, in relatively narrow, elongate arrays 33—60% of plant heights (often interrupted and with multiple levels). Involucres campanulate, 3.7—4.9 mm. Phyllaries stramineous, sometimes green-tipped, outer narrowly lanceolate, inner linear (firm), apices acute to acuminate. Ray florets (15—)17—22(—28). Disc florets (7—)9—11(—18); corollas 3.1—4.2 mm. 2 n = 18.

Flowering Jul—Nov. Moist to wet soils of streambeds, lake shores, and fresh to saline marshes; 0—1600 m; B.C.; Ariz., Calif., Colo., Idaho, Mont., Nebr., Nev., N.Mex., Oreg., Utah, Wash., Wyo.; Mexico (Baja California).

Updated: 2024-07-21 03:58:34 gmt
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