Symphyotrichum ciliolatum |
Symphyotrichum eulae |
|
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aster ciliolé, fringe blue aster, Lindley's American-aster, Lindley's aster, Lindley's or fringe blue aster |
Eula's aster, Texas aster |
|
Habit | Perennials, (10–)20–120 cm, colonial or cespitose; usually long-rhizomatous, sometimes with branched caudices. | Perennials, 5–150 cm, colonial; long-rhizomatous (rhizomes thick). |
Stems | 1–3+, erect (straight to ± flexuous), glabrate to sparsely hirsute or strigillose, especially distally. |
1–3+, erect (straight, stout), glabrous. |
Leaves | thin, margins coarsely, sharply serrate to crenate-serrate or serrulate, ciliate to scabrous, apices acute or acuminate, mucronulate, abaxial faces glabrate to sparsely hirsute, midveins usually densely hirsute, sometimes glabrous, adaxial glabrous or glabrate to scabrellous; basal usually withering by flowering (sometimes persistent on small plants), long-petiolate (petioles slightly winged, sheathing, ciliate), blades ovate, (24–)40–120(–270) × 15–70 mm, bases usually shallowly cordate, sometimes rounded; proximal cauline often withering by flowering, winged-petiolate, blades ovate to oblanceolate or lanceolate, (24–)60–150 × (10–)20–60 mm, reduced distally, bases subcordate to cuneate; distal sessile or sometimes subsessile (petioles widely-winged), blades lance-ovate to linear-lanceolate or linear, 18–75 × (2–)5–25 mm, bases cuneate, sometimes ± clasping, margins serrulate or entire. |
firm, margins serrulate to serrate, distally entire, ± revolute, scabrous, apices mucronate, abaxial faces glabrous or glabrate, adaxial scabrous, cauline often with axillary tufts of leaves; basal withering by flowering, petiolate (petioles slightly winged, ciliate, sheathing), blades ovate or elliptic to elliptic-lanceolate, 15–120 × 15–35 mm, bases gradually to ± abruptly attenuate, margins crenate-serrate, apices obtuse to acute; proximal cauline withering by flowering, petiolate to subpetiolate (clasping), blades elliptic to lanceolate, 85–100 × 18–30 mm, bases cuneate to slightly attenuate, apices acute to acuminate; distal sessile, blades elliptic or elliptic-lanceolate to lanceolate, or lance-oblong to linear-lanceolate (arrays), 8–90 × 1–25 mm, progressively reduced distally, abruptly so in arrays, bases cuneate, margins entire, apices acute to acuminate. |
Peduncles | 0.2–1.5+ cm, unequal, reduced distally, ± hirsutulous, bracts 0–4, subulate or linear. |
0.4–3 cm, secund, glabrous, bracts 5–10, not crowded, linear to linear-lanceolate, spreading, foliaceous, grading into phyllaries. |
Involucres | campanulate, (4–)5–6.5 mm. |
hemispheric, (4–)5–6.5 mm. |
Ray florets | (12–)14–20; corollas pale to deep blue or bluish purple, laminae (8.3–)10–15 × 1–2.3 mm. |
(20–)27–36; corollas usually white to bluish or lavender-white, rarely pale lavender or lavender-pink, laminae 8–11 × 1–1.5 mm. |
Disc florets | 14–25(–29); corollas yellow becoming reddish purple, 4.3–6.4 mm, tubes shorter than funnelform throats, lobes narrowly triangular, 0.5–1.1 mm. |
25–31; corollas yellow turning reddish then brown, (4.1–)4.5–5.8 mm, tubes shorter than funnelform throats, lobes recurved to erect, lanceolate, 1.1–1.3 mm. |
Phyllaries | in 4–5 series, narrowly oblong-lanceolate to oblong-oblanceolate or linear-oblanceolate (innermost), ± unequal, bases indurate 1/3–2/3, margins narrowly scarious, erose, hyaline or infrequently purplish, sparsely ciliolate, green zones lanceolate to linear-lanceolate or linear, apices acuminate to long-acuminate, faces glabrous. |
in 5–6 series, lanceolate to oblong-lanceolate (some inner linear), unequal, bases indurate 1/3–2/3, margins scarious, erose, hyaline, sparsely ciliolate, green zones lanceolate, prominent, apices acute (acuminate), slightly spreading, faces glabrous. |
Heads | [(6–)13–50(–100+)] in open, paniculiform arrays, branches ascending. |
in leafy, open, paniculiform arrays, branches ascending to divaricate, nearly horizontal, elongate (to 38 cm), secund-racemiform. |
Cypselae | yellowish white, obovoid, compressed, 1–2 mm, 5–6-nerved, faces glabrate to sparsely strigillose; pappi white to pinkish, 3–6 mm. |
tan to reddish brown, obovoid to fusiform-obovoid, ± compressed, 1.4–2.9 mm, 4–5-nerved, faces strigillose; pappi white (sordid), 4.5–5.8 mm. |
2n | = 48. |
= 48. |
Symphyotrichum ciliolatum |
Symphyotrichum eulae |
|
Phenology | Flowering late Jul–Oct. | Flowering Oct. |
Habitat | Rich, open, often ± calcareous, boreal deciduous forests (aspen or aspen-birch-fir-spruce), edges of woods, clearings, aspen or bur oak thickets, sometimes open pine forests, streambanks, trails, roadsides | Usually partly shaded, heavy-clayey, clayey-loamy, or silty soils, banks, open stream-bottom woods, ditches, drainage systems, disturbed areas, hedgerows |
Elevation | 0–2000+ m (0–6600+ ft) | 0–100 m (0–300 ft) |
Distribution |
IL; MA; ME; MI; MN; MT; ND; NH; NY; SD; VT; WI; WY; AB; BC; MB; NB; NF; NS; NT; ON; QC; SK; YT
|
TX |
Discussion | Symphyotrichum ciliolatum sporadically hybridizes with S. laeve var. laeve or var. geyeri in their areas of overlap, notably across the Canadian prairies and in south-central Ontario (Manitoulin Island, Bruce Peninsula). It also hybridizes with S. novi-belgii var. novi-belgii in the Gulf of St. Lawrence area [Symphyotrichum ×subgeminatum (Fernald) G. L. Nesom; syn. Aster subgeminatus (Fernald) B. Boivin]. Aster ciliolatus forma comatus Fernald is densely ciliolate along the midnerves and represents an extreme of the variation found in the species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Symphyotrichum eulae is known only from Texas. It has been reported as a hybrid of S. lanceolatum and S. praealtum. It is not a hybrid, according to Shinners, and we are not considering it as such here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 502. | FNA vol. 20, p. 516. |
Parent taxa | Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum > sect. Symphyotrichum | Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum > sect. Symphyotrichum |
Sibling taxa | ||
Synonyms | Aster ciliolatus, Aster ciliolatus var. comatus, Aster lindleyanus, Aster wilsonii | Aster eulae |
Name authority | (Lindley) Á. Löve & D. Löve: Taxon 31: 359. (1982) | (Shinners) G. L. Nesom: Phytologia 77: 281. (1995) |
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