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Overview

Distribution

Localities documented in Tropicos sources

Erigeron subtrinervis var. conspicuus (Rydb.) Cronquist:
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Localities documented in Tropicos sources

Erigeron speciosus var. macranthus (Nutt.) Cronquist:
Canada (North America)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Localities documented in Tropicos sources

Erigeron speciosus var. conspicuus (Rydb.) Breitung:
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Localities documented in Tropicos sources

Erigeron speciosus (Lindl.) DC.:
China (Asia)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Description

Perennials, 30–80(–100) cm; rhizomatous, fibrous-rooted, caudices relatively thick. Stems erect, glabrous or sparsely hirsuto-pilose (hairs 0.5–1 mm), often minutely glandular distally. 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). Heads (2–)4–20 in corymbiform arrays. Involucres 6–9 × 11–22 mm. Phyllaries in 2–3(–4) series, usually glabrous, sometimes sparsely hirsuto-pilose, minutely glandular. Ray florets 75–150; corollas blue to lavender, rarely whitish, 8–16 mm (mostly 1 mm wide), laminae slightly coiling at least at tips. Disc corollas 4–5 mm. Cypselae 1.5–1.8 mm, 2(–4)-nerved, faces sparsely strigose; pappi: outer of setae, inner of 20–30 bristles.
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Diagnostic Description

Synonym

Stenactis speciosa Lindley, Edwards’s Bot. Reg. 19: plate 1577. 1833; Erigeron conspicuus Rydberg; E. macranthus Nuttall; E. speciosus var. conspicuus (Rydberg) Breitung; E. speciosus var. macranthus (Nuttall) Cronquist; E. subtrinervis Rydberg ex Porter & Britton subsp. conspicuus (Rydberg) Cronquist; E. subtrinervis var. conspicuus (Rydberg) Cronquist
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Type Information

Isotype for Erigeron eucephaloides Greene
Catalog Number: US 242558
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): B. W. Evermann
Year Collected: 1895
Locality: Pettit Lake., Idaho, United States, North America
  • Isotype: Greene, E. L. 1912. Leafl. Bot. Observ. Crit. 2: 216.
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Isotype for Erigeron villosulus Greene
Catalog Number: US 690653
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): J. Fleet
Year Collected: 1911
Locality: Mt. Angeles., Washington, United States, North America
  • Isotype: Greene, E. L. 1912. Leafl. Bot. Observ. Crit. 2: 215.
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Isolectotype for Erigeron conspicuus Rydb.
Catalog Number: US 361262
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: ; Card file verified by examination of alleged type specimen
Preparation: Pressed specimen
Collector(s): P. A. Rydberg & E. Bessey
Year Collected: 1897
Locality: Jack Creek., Montana, United States, North America
  • Isolectotype: Rydberg, P. A. 1900. Mem. New York Bot. Gard. 1: 400.; Cronquist, A. J. 1947. Brittonia. 6: 156.
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Holotype for Erigeron leiophyllus Greene
Catalog Number: US 221417
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): M. E. Jones
Year Collected: 1886
Locality: Fort Douglas., Utah, United States, North America
  • Holotype: Greene, E. L. 1912. Leafl. Bot. Observ. Crit. 2: 218.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Erigeron speciosus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Conservation Status

NatureServe Conservation Status

Rounded Global Status Rank: T5 - Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: T5 - Secure

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: N4 - Apparently Secure

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NatureServe Conservation Status

Rounded Global Status Rank: T4 - Apparently Secure

Reasons: Widespread in western US and Canada on gravelly or loamy soil on wooded mountain slopes.

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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Notes

Comments

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.

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Names and Taxonomy

Taxonomy

Comments: This is a narrowly defined concept which excludes Erigeron speciosus var. mollis as per Kartesz 1999.

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