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Flat Top Goldentop

Euthamia graminifolia (L.) Nutt.

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Plants with densely hairy leaves and stems have been called var. nuttallii. Though extremes are distinct, the plants cannot be reliably separated rangewide from typical Euthamia graminifolia. Plants called var. major have been distinguished primarily on the basis of leaf dimensions (lengths 8–11 times widths in var. major versus 11–20 in typical E. graminifolia). Overlap is extensive; no discrete boundaries can be drawn.

Euthamia hirtipes was described as a putative hybrid involving a hairy E. graminifolia and a small-headed E. caroliniana (M. L. Fernald 1946d). It combines broad, hairy leaf blades with few-flowered heads, a condition that is not intermediate between the putative parents. D. J. Sieren and J. F. Merrit (1980) and C. E. Taylor (1975) reviewed the plants. Until evidence can be supplied to the contrary, E. hirtipes should be considered a synonym of E. graminifolia.

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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 97, 98, 99 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Description

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Perennials, 30–150 cm. Stems (commonly branched in distal 1 / 4 ) glabrous or densely spreading-hirtellous, not glaucous. Leaves spreading to ascending; blades 3- or 5-nerved, linear to lanceolate, 37–130 × (2.1–)3–12 mm, lengths 7–20 times widths, abruptly to gradually reduced distally, herbaceous to firm-herbaceous, margins scabro-ciliate, apices obtuse to acuminate, faces usually little and obscurely gland-dotted (26–47 dots per mm²), barely viscid (more so on exposed shores), glabrous or densely spreading-hirtellous. Heads glomerulate, usually in flat-topped arrays (1.5–28 cm diam.), 10–28% of plant heights (branches unequal, giving irregular, broken appearance). Involucres broadly campanulate to campanulate, 3–5.3 mm. Phyllaries often ± yellow basally, outer (at least) usually green-tipped, outer ovate, inner oblong, apices obtuse or broadly acute. Ray florets (7–)17–22(–35). Disc florets (3–)5–7(–13); corollas 2.6–3.4 mm. 2n = 18.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 97, 98, 99 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
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eFloras

Synonym

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Chrysocoma graminifolia Linnaeus, Sp. Pl. 2: 841. 1753 ; Euthamia fastigiata Bush; E. floribunda Greene; E. graminifolia var. major (Michaux) Moldenke; E. graminifolia var. nuttallii (Greene) Sieren; E. hirtipes (Fernald) Sieren; Solidago camporum Greene var. tricostata Lunell; S. graminifolia (Linnaeus) Salisbury var. major (Michaux) Fernald; S. graminifolia var. septentrionalis Fernald; S. hirtipes Fernald; S. lanceolata Linnaeus
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 97, 98, 99 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Euthamia graminifolia

provided by wikipedia EN

Euthamia graminifolia, the grass-leaved goldenrod or flat-top goldentop, is a North American species of plants in the family Asteraceae.[3]

It is native to much of Canada (from Newfoundland to British Columbia), and the northern and eastern United States (primarily the Northeast, the Great Lakes region, and the Ohio Valley, with additional populations in the Southeast, the Great Plains, and a few scattered locations in the Pacific Northwest).[3][4] There are also introduced populations in Europe and Asia.[5]

Description

Euthamia graminifolia is a herbaceous plant on thin, branching stems. Leaves are alternate, simple, long and narrow much like grass leaves (hence the name of the species). One plant can produce many small, yellow flower heads flat-topped arrays sometimes as much as 30 cm (1 foot) across. Each head has 7–35 ray florets surrounding 3–13 disc florets. The species is very common in fallow fields, waste places, fencerows, and vacant lots in many places.[3]

References

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Euthamia graminifolia: Brief Summary

provided by wikipedia EN

Euthamia graminifolia, the grass-leaved goldenrod or flat-top goldentop, is a North American species of plants in the family Asteraceae.

It is native to much of Canada (from Newfoundland to British Columbia), and the northern and eastern United States (primarily the Northeast, the Great Lakes region, and the Ohio Valley, with additional populations in the Southeast, the Great Plains, and a few scattered locations in the Pacific Northwest). There are also introduced populations in Europe and Asia.

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