Euthamia leptocephala

(Torrey & A. Gray) Greene ex Porter & Britton

Mem. Torrey Bot. Club 5: 321. 1894.

Common names: Mississippi Valley goldentop
Endemic
Basionym: Solidago leptocephala Torrey & A. Gray Fl. N. Amer. 2: 226. 1842
Treatment appears in FNA Volume 20. Treatment on page 100. Mentioned on page 98.

Perennials or subshrubs, 30–100 cm. Stems (erect, striate-angled) glabrous, not glaucous. Leaves ascending to spreading-ascending; blades 3-nerved 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. Heads glomerate or pedunculate, in compact, usually round-topped arrays 6–35% of plant heights. Involucres obconic, 4–6 mm. Phyllaries yellowish at bases, usually green-tipped, outer narrowly ovate, inner nearly linear, apices rounded to subacute (sometimes slightly resinous). Ray-florets usually 7–14. Disc-florets 3–6; corollas 3.3–4.4 mm. 2n = 18.


Phenology: Flowering Sep–Nov.
Habitat: Moist, sandy soils of open areas, woodlands, and forest openings
Elevation: 0–100 m

Distribution

V20-194-distribution-map.gif

Ala., Ark., Fla., Ga., La., Miss., Mo., N.C., Okla., Tenn., Tex.

Discussion

I have seen no specimens of Euthamia leptocephala from Kentucky; it is to be expected there.

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property.

... more about "Euthamia leptocephala"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Arthur Haines +
(Torrey & A. Gray) Greene ex Porter & Britton +
pale +  and stramineous +
decurrent +
Solidago leptocephala +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
lanceolate;narrowly lanceolate +
reduced +
3mm;6mm +
rugulose +  and muricate +
Mississippi Valley goldentop +
not 2-lipped +  and actinomorphic +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
terete +, oblong +  and narrowly ellipsoid +
fertile +  and bisexual +
fertile +  and bisexual +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, Mo. +, N.C. +, Okla. +, Tenn. +  and Tex. +
0–100 m +
gland-dotted +
pustulate +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Moist, sandy soils of open areas, woodlands, and forest openings +
pedunculate +  and glomerate +
in corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
erect;ascending +
oblong-lanceolate +
cartilaginous +  and chartaceous +
2-carpellate +
persistent +
Flowering Sep–Nov. +
green-tipped +  and yellowish +
linear +  and ovate +
Mem. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
concave;usually flat;conic +
exalbuminous +
branched +  and simple +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Euthamia leptocephala +
Euthamia +
species +
tubular +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +