Euthamia caroliniana (L.) Greene ex Porter & Britton
Euthamia microcephala Greene
Euthamia microphylla Greene
Euthamia minor (Michx.) Greene
Euthamia tenuifolia (Pursh) Nutt.
Euthamia tenuifolia (Pursh) Nutt. var. tenuifolia
Solidago caroliniana (L.) Britton Sterns & Poggenb.
Solidago minor (Michx.) Fernald
Solidago microphylla (Greene) Bush
Solidago microcephala (Greene) Bush
Solidago tenuifolia Pursh
Slender Goldentop, Slender Fragrant Goldenrod, Coastal Plain Flat-topped Goldenrod
Slender goldentop, also known as coastal plain flat-topped goldenrod, is a North American native. It is not, however, a true goldenrod, though it is often classified as such. For a comparison table of goldenrods and similar species, see Solidago.
Identification: Plants are 10-39" (25-100 cm) in height. Stems are branched partway up, smooth, without a waxy bluish coating (technically, glabrous or glabrate, not glaucous). Leaves are linear, like grass blades, abundant, and typically bent downward or backward (deflexed). They are ⅞-2½" (2.4-7 cm) long and ¹/₃₂-⅛" (1-3 mm) wide, rarely up to ⅛" (6 mm) wide and smooth, especially at maturity. Leaves have resinous dots. The flowerheads are flat-topped or rounded, often multiply layered, with tiny yellow flowers, blooming from Aug-Dec.
Some Euthamias are listed below. This genus is in taxonomic flux, so the names are likely to change:
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|Plant||10-39" (25-100 cm) in height.||12-48" (30-121 cm) tall, often branched only slightly, sometimes heavily-branched and bushy.|
|Flowers||Flowerheads are flat-topped or rounded, often multiply layered, with tiny yellow flowers, blooming from Aug-Dec.||Large, flat-topped or umbrella-shaped yellow flower clusters. Each flower in the flowerhead is ⅛" (3.2 mm) across. Flowerheads tend to bloom gradually, not all at once, emitting a modest, sweet scent.|
|Leaves||Linear, like grass blades, abundant, typically bent downward or backward (deflexed). ⅞-2½" (2.4-7 cm) long and ¹/₃₂-⅛" (1-3 mm) wide, (up to ⅛" (6 mm)) and smooth. Leaves have resinous dots.||Lance-shaped leaves contain 3 veins running along the length of the vein. Sometimes there is 1 or 5 veins, depending on leaf size. Leaves are 3-6" (7.6-15 cm) × ⅛-⅝" (3.2-15 mm), resembling grass blades, and attached directly to the stem (“sessile”). Leaves have resinous dots.|
|Stem||Stems are branched partway up, smooth, without a waxy bluish coating (technically, glabrous or glabrate, not glaucous).||Stems typically have rows of fine white hairs.|
Euthamia caroliniana at the Lady Bird Johnson Wildflower Center
Euthamia caroliniana on eFloras
Clemants, Steven; Gracie, Carol, Wildflowers in the Field and Forest, Oxford University Press, 2006, p, 158
Euthamia caroliniana description by Thomas H. Kent, last updated 2 Jan 2019.