Erigeron speciosus |
Erigeron lobatus |
|
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aspen fleabane, showy daisy, showy fleabane, splendid fleabane |
lobed fleabane |
|
Habit | Perennials, 30–80(–100) cm; rhizomatous, fibrous-rooted, caudices relatively thick. | Annuals, mostly 10–40(–50) cm; taprooted. |
Stems | erect, glabrous or sparsely hirsuto-pilose (hairs 0.5–1 mm), often minutely glandular distally. |
erect, sparsely hispido-pilose (hairs spreading, straight, 0.6–2 mm), densely stipitate-glandular. |
Leaves | basal (usually withering by flowering) and cauline; basal blades oblanceolate-spatulate, 30–80(–150) × 4–18(–28) mm, margins entire, often ciliate (main veins sometimes also), faces glabrous, eglandular or distal sparsely minutely glandular; cauline blades ovate to ovate-lanceolate, oblong-lanceolate, or lanceolate, nearly even-sized distally or sometimes mid largest (continuing to immediately below heads, bases usually clasping to subclasping). |
basal (persistent) and cauline; basal and proximal cauline blades obovate-spatulate, 50–100(–150) × 4–25 mm, cauline gradually reduced (lobing distally), margins pinnatifid or bipinnatifid with (1–)2–4 pairs of rounded to acute lobes, faces sparsely hispido-pilose, stipitate-glandular. |
Involucres | 6–9 × 11–22 mm. |
3–4 × 6–10 mm. |
Ray florets | 75–150; corollas blue to lavender, rarely whitish, 8–16 mm (mostly 1 mm wide), laminae slightly coiling at least at tips. |
85–110; corollas white, drying dark blue, 6–9 mm, laminae not coiling or reflexing. |
Disc corollas | 4–5 mm. |
1.8–2.9 mm. |
Phyllaries | in 2–3(–4) series, usually glabrous, sometimes sparsely hirsuto-pilose, minutely glandular. |
in 2–3 series (sometimes basally connate, broad, thin) sparsely hispido-pilose, stipitate glandular. |
Heads | (2–)4–20 in corymbiform arrays. |
1–5 (peduncles long, ebracteate). |
Cypselae | 1.5–1.8 mm, 2(–4)-nerved, faces sparsely strigose; pappi: outer of setae, inner of 20–30 bristles. |
1.2–1.4 mm, 2-nerved, faces sparsely strigose; pappi: outer of scales (sometimes connate, forming crowns), inner of 11–12 bristles. |
Erigeron speciosus |
Erigeron lobatus |
|
Phenology | Flowering Jul–Oct. | Flowering (Jan–)Feb–May(–Oct). |
Habitat | Dry or moist, gravelly or loamy soil, prairies, yellow pine, pine-fir, spruce-fir, aspen-spruce | Stream banks, sandy lake shores, dry washes, desert or riparian scrub, sometime with creosote bush |
Elevation | (600–)900–3400 m ((2000–)3000–11200 ft) | 300–1200 m (1000–3900 ft) |
Distribution |
AZ; CO; ID; MT; NM; NV; OR; SD; UT; WA; WY; AB; BC; Mexico (Baja California)
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AZ; CA; NV; Mexico (Sonora)
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Discussion | The population in Baja California is disjunct from the closest range in Arizona and northern Nevada. Plants glabrous and glandular on the phyllaries, stems, and leaves have been recognized as var. macranthus; they intergrade with hairier forms and do not show a coherent geographic pattern. Plants commonly identified as Erigeron subtrinervis var. conspicuus usually have stems sparsely hirsuto-pilose with hairs 1–1.5 mm, and the leaves commonly are ciliate on the margins and veins. As implied in the nomenclatural combination by Breitung, those plants are more similar to E. speciosus than to E. subtrinervis, and they apparently show part of the greater variability of E. speciosus in the northwestern part of its range (Alberta, British Columbia, Idaho, Montana, Oregon, Washington, and Wyoming), where more typical plants also occur. Erigeron speciosus and E. subtrinervis are sympatric over large parts of their ranges and appear to be at least partially reproductively isolated entities, although intermediates are frequently encountered. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Erigeron lobatus is characterized by persistent basal and proximal cauline leaves with rounded to acute lobes, vestiture of stipitate glands and sparse, spreading, hispido-pilose hairs, heads on relatively long, ebracteate peduncles, and broad, thin phyllaries. Erigeron divergens often is similar; its glandularity is not stipitate and its nonglandular hairs are shorter and denser. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 330. | FNA vol. 20, p. 338. |
Parent taxa | Asteraceae > tribe Astereae > Erigeron | Asteraceae > tribe Astereae > Erigeron |
Sibling taxa | ||
Synonyms | Stenactis speciosa, E. conspicuus, E. macranthus, E. speciosus var. conspicuus, E. speciosus var. macranthus, E. subtrinervis subsp. conspicuus, E. subtrinervis var. conspicuus | |
Name authority | (Lindley) de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 284. (1836) | A. Nelson: Amer. J. Bot. 21: 580. (1934) |
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