Euthamia leptocephala |
Euthamia gymnospermoides |
|
---|---|---|
bushy goldentop, Mississippi Valley goldentop |
Great Plains goldentop, Texas goldentop, viscid grass-leaf goldenrod |
|
Habit | Perennials or subshrubs, 30–100 cm. | Perennials or subshrubs, 40–150 cm. |
Stems | (erect, striate-angled) glabrous, not glaucous. |
(simple or branched) glabrous or with scabrous lines, not glaucous. |
Leaves | ascending to spreading-ascending; blades 3- or -5-nerved, lanceolate to narrowly lanceolate, 40–80 × 3–6(–9) mm, lengths 8–18 times widths, abruptly reduced distally, firm-herbaceous, margins scabrous, apices mostly acute, faces glabrous, little and obscurely gland-dotted (9–29 dots per mm²), sometimes pustulate. |
usually ascending; blades (1–)3- or -5-nerved, linear to lanceolate, 40–100(–120) × 1.4–4(–8) mm, lengths 12–49 time widths, gradually reduced distally, firm-herbaceous, margins scabrous, apices acuminate, faces abundantly and prominently gland-dotted (29–49 dots per mm²), glabrous or midveins with hairs. |
Involucres | obconic, 4–6 mm. |
obconic, (4–)4.5–6.2 mm. |
Ray florets | usually 7–14. |
9–13(–16). |
Disc florets | 3–6; corollas 3.3–4.4 mm. |
3–9; corollas (3–)3.3–4.8 mm. |
Phyllaries | yellowish at bases, usually green-tipped, outer narrowly ovate, inner nearly linear, apices rounded to subacute (sometimes slightly resinous). |
usually green-tipped, outer ovate, inner linear-oblong, apices obtuse to acute (± strongly resinous). |
Heads | glomerate or pedunculate, in compact, usually round-topped arrays 6–35% of plant heights. |
(some or all) pedunculate (rarely all glomerate), usually in flat-topped to slightly rounded, arrays (25–)35–60% of plant heights. |
2n | = 18. |
= 36, 54. |
Euthamia leptocephala |
Euthamia gymnospermoides |
|
Phenology | Flowering Sep–Nov. | Flowering Aug–Sep. |
Habitat | Moist, sandy soils of open areas, woodlands, and forest openings | Open, dry to moist, sandy areas |
Elevation | 0–100 m (0–300 ft) | 0–200 m (0–700 ft) |
Distribution |
AL; AR; FL; GA; LA; MO; MS; NC; OK; TN; TX
|
AR; CO; DE; FL; IA; IL; IN; KS; LA; MN; MO; NC; NE; OK; SC; SD; TX; VA; WI; ON
|
Discussion | I have seen no specimens of Euthamia leptocephala from Kentucky; it is to be expected there. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Some plants from the southern Great Lakes area with tendencies to shorter involucres and narrower leaves, called Euthamia gymnospermoides by H. A. Gleason and A. Cronquist (1991) and D. J. Sieren (1981), are better included in E. caroliniana. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 100. | FNA vol. 20, p. 99. |
Parent taxa | Asteraceae > tribe Astereae > Euthamia | Asteraceae > tribe Astereae > Euthamia |
Sibling taxa | ||
Synonyms | Solidago leptocephala | E. camporum, E. chrysothamnoides, E. glutinosa, E. pulverulenta, Solidago gymnospermoides var. callosa, Solidago texensis |
Name authority | (Torrey & A. Gray) Greene ex Porter & Britton: Mem. Torrey Bot. Club 5: 321. (1894) | Greene: Pittonia 5: 75. (1902) |
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