Euthamia caroliniana (Slender goldentop)

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Euthamia caroliniana (L.) Greene ex Porter & Britton

Slender goldentop, slender fragrant goldenrod, coastal plain flat-topped goldenrod

Kingdom	Plantae	Plants, but not fungi, lichens, or algae
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Asteridae	A large class that encompasses asters
Order	Asterales	Flowering plants with a central disk flower and surrounding petals, like daisies
Family	Asteraceae	The aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
Genus	Euthamia	Greek for “well-crowded,” from the dense flowerheads
Species	caroliniana	“From the Carolinas”

About plant names...

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:

8/25/2013 · Casalis State Forest, Elm Hill Rd, Peterborough, New Hampshire
≈ 5 × 5" (13 × 13 cm) ID is uncertain

7/31/2021 · Otter Brook Preserve, Harpswell, Maine
≈ 7 × 6" (17 × 14 cm)

8/25/2013 · Casalis State Forest, Elm Hill Rd, Peterborough, New Hampshire
≈ 8 × 6" (20 × 14 cm) ID is uncertain

	You are here Euthamia caroliniana	*Euthamia graminifolia*
Common Name	slender goldentop	flat-top goldentop
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.
Range/ Zones
Type	Wild	Wild