Overview

Distribution

National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Physical Description

Morphology

Description

Perennials, 10–35(–70) cm (in bushy clumps); taproots deep, vertical, rhizomes branched, woody. Stems erect to ascending or decumbent, green, glaucous, much branched from bases and distally, strongly striate, glabrous (often bearing round galls). Leaves (basal not in rosettes, absent at flowering); proximal blades linear, 5–30(–60) × 1–2(–4) mm, margins entire, apices acute, faces glabrous; cauline reduced to subulate scales. Heads (1–50+) borne singly or in corymbiform arrays. Involucres cylindric, 10–16 × 4–6 mm, apices spreading. Calyculi of 8, ovate to linear bractlets 2–4 mm, margins erose-ciliate (faces glabrous). Phyllaries 5(–7), linear, 10–15 mm, margins scarious, apices acute or obtuse, not appendaged, faces glabrous . Florets usually 5; corollas usually light pink to lavender, rarely white, 18–20 mm, ligules 3–4 mm wide. Cypselae 6–10 mm, weakly striate, glabrous ; pappi 6–9 mm. 2n = 18.
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Diagnostic Description

Synonym

Prenanthes juncea Pursh, Fl. Amer. Sept. 2: 498. 1813
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Lygodesmia juncea

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: N5 - Secure

United States

Rounded National Status Rank: N5 - Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Notes

Comments

Lygodesmia juncea is the most widespread species of the genus, occurring throughout the High Plains region of North America. It is easily distinguished by its bushy habit, greatly reduced cauline leaves, relatively small heads and involucres, and phyllaries lacking appendages. Mature cypselae are rarely found on this species, and the plants are presumably sterile and reproduce mainly by vegetative means. Many specimens have round galls to 10 mm diameter on the stems, produced by solitary wasps and apparently unique to this species.
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