Eurybia paludosa

(Aiton) G. L. Nesom

Phytologia 77: 261. 1995.

Common names: Southern swamp aster
Endemic
Basionym: Aster paludosus Aiton Hort. Kew. 3: 201. 1789
Synonyms: Heleastrum paludosum (Aiton) de Candolle
Treatment appears in FNA Volume 20. Treatment on page 380. Mentioned on page 367, 377, 379, 381.

Plants 20–80 cm; in clumps and clones, eglandular; rhizomes creeping, herbaceous and thin, becoming thick and woody, scaly. Stems 1–10+, erect, often reddish, simple, straight (brittle), proximally glabrous, glabrescent, or sparsely strigillose, distally strigillose or ± villoso-hirsute (at least in arrays). Leaves basal and cauline, firm, only midnerves evident, margins indurate, entire or sometimes remotely spinulose-serrate, scabrous, spines indurate, ± pronounced, apices mucronate or indurate, abaxial faces glabrous or scabrous, adaxial sparsely hirtellous, distal often more hairy; basal and proximalmost cauline withering by flowering, petioles (often marcescent, to 20 mm), bases sheathing, blades elliptic to lanceolate (basal) or linear-lanceolate, ± arcuate (proximal), 15–103 × 5–9 mm, bases cuneate, apices obtuse (basal) to acute; cauline progressively sessile (petioles more winged) and reduced, blades lanceolate or linear-lanceolate to linear, ± arcuate, 18–132+ × 2–6 mm, margins sometimes revolute, apices acute. Heads (1–) 4–10+ in open, corymbiform arrays, seldom borne singly, with ascending branches. Peduncles ascending, usually mostly 1–10+ cm (seldom not elongating, sometimes those of young heads appearing short or absent), thin, hirtello-puberulent to villoso-hirsute; bracts 2–5, often 1–2 subtending heads, sometimes phyllary-like (bases pale, indurate). Involucres campanulate, 9–11 mm, much shorter than pappi. Phyllaries 40–65+ in 4–5 series, lanceolate or oblong (outer) to linear-oblanceolate or linear (inner), unequal, membranous, bases indurate, rounded (particularly outer), green zones well defined, slightly expanded in distal 1/3–2/3 (foliaceous), reaching margins (outer wholly foliaceous, outermost bracts subtending heads) to 1/6 or less and not reaching margins or none (inner), margins sometimes distally purplish (particularly inner), indurate, narrowly scarious, erose proximally to nearly completely so (inner), densely ciliate proximally (scarious part) to distally scabrous (foliaceous part), apices loose and often spreading, sometimes squarrose, obtuse to sometimes acute, mucronate, faces sparsely to densely strigillose. Ray-florets 15–35; corollas deep lavender to purple, (10–) 15–20 × 1–2.3 mm. Disc-florets 25–60; corollas yellow, 5.5–7 mm, slightly ampliate, tubes much shorter than cylindro-funnelform throats, lobes spreading, lanceolate-acuminate, 0.75–1.1 mm. Cypselae stramineous to tawny, cylindric to narrowly obovoid, slightly compressed, 2.3–3.6 mm, ribs 10–16, sparsely strigillose; pappi of stramineous (firm, sometimes apically clavellate) bristles 5–6.7 mm, ± equaling disc corollas. 2n = 36.


Phenology: Flowering late summer–fall.
Habitat: Moist savannas, margins of pools and swamps, low pinelands, seldom on sand hills of coastal plains, open hammocks
Elevation: 0–100 m

Discussion

Eurybia paludosa is often confused with E. hemispherica, with which it is closely related. It is present on the Atlantic coastal plain from North Carolina to northeastern Florida. The two species are disjunct geographically and ecologically, even when they occur in the same states. In North Carolina, for instance, E. paludosa is coastal while E. hemispherica is found in the mountains. In northern Florida, the former is found only in Nassau County, while the latter is present only in the western panhandle. Their ranges do not overlap.

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."thin" is not a number."thick" is not a number. "thin" is not a number.

... more about "Eurybia paludosa"
scabrous +  and glabrous +
not tailed +, rounded +  and obtuse +
distinct +
1.8 cm18 mm <br />0.018 m <br /> (13.2 cm132 mm <br />0.132 m <br />) +
squarrose +  and spreading +
subequal +
indurate +
2mm +  and 6mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +  and open +
indeterminate +  and determinate +
Luc Brouillet +
(Aiton) G. L. Nesom +
rounded +  and cuneate +
indurate +
Aster paludosus +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (10.3 cm103 mm <br />0.103 m <br />) +
linear-lanceolate;lanceolate;elliptic;lanceolate or linear-lanceolate +
reduced +
5mm;9mm +
rugulose +  and muricate +
phyllary-like +
barbellulate +  and barbellate +
0.5 cm5 mm <br />0.005 m <br /> (0.67 cm6.7 mm <br />0.0067 m <br />) +
Southern swamp aster +
not 2-lipped +  and actinomorphic +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
yellow +, lavender +  and purple +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
ampliate +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
7-12(-18)-nerved +
beaked +, 2-ribbed +  and 5-ribbed +
stramineous +  and tawny +
compressed +, cylindric +  and narrowly obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Fla. +, Ga. +, N.C. +  and S.C. +
0–100 m +
strigillose +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Moist savannas, margins of pools and swamps, low pinelands, seldom on sand hills of coastal plains, open hammocks +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1.4 cm14 mm <br />0.014 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
campanulate +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
lanceolate-acuminate +
spinulose-serrate +  and entire +
18mm;132mm +
densely ciliate +  and proximally distally scabrous +
2mm +  and 6mm +
2-carpellate +
barbellulate +  and barbellate +
pinkish +, yellowish +, tan +, tawny +  and cinnamon +
persistent +
unequal +
hirtello-puberulent +  and villoso-hirsute +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering late summer–fall. +
oblong +  and linear-oblanceolate or linear +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
strigillose +
10 +  and 16 +
exalbuminous +
straight +
1 +  and 10 +
appendaged +  and truncate +
papillate +  and smooth +
Heleastrum paludosum +
Eurybia paludosa +
species +
ampliate +
10 cm100 mm <br />0.1 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
less;0;1/6 +
expanded +