Brintonia discoidea

(Elliott) Greene

Erythea 3: 89. 1895.

Common names: Rayless mock goldenrod
IllustratedEndemic
Basionym: Aster discoideus Elliott Sketch Bot. S. Carolina 2: 358. 1823
Synonyms: Solidago discoidea (Elliott) Torrey & A. Gray
Treatment appears in FNA Volume 20. Treatment on page 106.

Stems moderately soft-villous (longest hairs ca. 1 mm), sometimes sparsely proximally. Leaves: basal and proximal cauline: petioles distally winged, 2–8 cm, moderately villous, blades broadly to narrowly ovate, 40–100 × 30–80 mm, bases cordate or attenuate, margins serrate, teeth acuminate, faces abaxially moderately short-strigose, hairs longer on larger nerves, adaxially less short-strigose; mid and distal cauline: petioles reduced distally to 1/4 lengths of blades in arrays, blades similar to proximal, reduced distally to 1 cm. Heads 1–4 (–10) per lateral branch; 1–4 proximal branches to 10+ cm. Peduncles shorter than internodes, thin, strigose; bracteoles proximal to heads linear, strigose. Phyllaries: lengths of outer 2 times inner, apices long-acuminate, both faces apically villoso-strigose. Disc-floret corollas 4–5 mm, narrow tubes bright green, limbs 50–60% length of corolla, lobes 1.5–2 mm, 75% length of limbs; anthers faintly tinted rose-purple; style-branches linear-lanceolate, abaxially hispidulous proximally, otherwise finely papillate, abaxial-marginal stigmatic lines along proximal 2/5. Cypselae golden brown to dark-brown, 3–4 mm. 2n = 18.


Phenology: Flowering Aug–Oct.
Habitat: Sandy soils, rich, sometimes swampy woods
Elevation: 10–200 m

Distribution

V20-209-distribution-map.gif

Ala., Fla., Ga., La., Miss.

Discussion

Brintonia discoidea grows on the Gulf coastal plain east of the Mississippi River and in the extreme southern valley and ridge province in northern Alabama.

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."timesinnerphyllaries" is not declared as a valid unit of measurement for this property."thin" is not a number.

... more about "Brintonia discoidea"
not tailed +, rounded +  and obtuse +
tinted rose-purple +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +  and open +
indeterminate +  and determinate +
John C. Semple +
(Elliott) Greene +
attenuate +  and cordate +
Aster discoideus +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
reduced +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
30mm;80mm +
rugulose +  and muricate +
purplish +  and white +
Rayless mock goldenrod +
not 2-lipped +  and actinomorphic +
rose-purple-tinted +  and white +
beaked +, 2-ribbed +  and 5-ribbed +
golden brown +  and dark-brown +
mostly narrowly obconic +  and fusiform +
fertile +  and bisexual +
fertile +  and bisexual +
Ala. +, Fla. +, Ga. +, La. +  and Miss. +
10–200 m +
villoso-strigose +  and short-strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy soils, rich, sometimes swampy woods +
short-strigose +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
campanulate +
cauline +, proximal +  and basal +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
lanceolate +
2-carpellate +
persistent +
0 lengths of blades;1/4 lengths of blades +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
Flowering Aug–Oct. +
foliaceous +  and 1-nerved +
lanceolate +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
concave;usually flat;conic +
5 +  and 10 +
exalbuminous +
Illustrated +  and Endemic +
appendaged +  and truncate +
linear-lanceolate +
papillate +  and smooth +
Solidago discoidea +
Brintonia discoidea +
Brintonia +
species +
acuminate +
bright green +
cauline +  and mid +
40 cm400 mm <br />0.4 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
tree +, shrub +  and subshrub +