Hieracium albiflorum — Details

White Hawkweed learn more about names for this taxon

Overview

Brief Summary

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Hieracium albiflora is broadly distributed in North America from Alaska to California and eastward to Manitoba, South Dakota and Colorado. The classic habitat for occurrence of this herb is within dry forests at elevations from sea level to 2900 meters in elevation.

Also known as White hawkweed, this plant can achieve a height of 40 to 80 centimeters. The lower plant is densely hairy, with oblong to oblanceolate leaves being mostly basal. These coarsely hairy leaves are either entire or few toothed and have a length of eight to 15 centimeters. This white flowered species, unlike most hawkweeds, is a true native to North America.
  • * United States Department of Agriculture. 2010. Plants Profile: Hieracium albiflorum. USDA. Natural Resources Conservation Service

    * Jepson Manual. 1993. Hieracium albiflora University of California, Berkeley, California, USA

  • * Gary A. Monroe. 2000. "Hieracium albiflorum". Fire Effects Information System. USDA Forest Service.
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Distribution

National Distribution

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Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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Hieracium albiflorum Hook.:
United States (North America)
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Physical Description

Morphology

Description

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Plants 15–40(–90) cm. Stems proximally usually piloso-hirsute (hairs 1–6+ mm), rarely glabrous, distally glabrous. Leaves: basal (0–)3–8+, cauline 1–5(–12+); blades oblanceolate, 40–100(–300) × 12–30(–60+) mm, lengths 3–5+ times widths, bases cuneate, margins usually entire, sometimes sinuately toothed, apices obtuse to acute, faces piloso-hirsute (hairs 1–6 mm), rarely glabrous. Heads (3–)12–50+ in corymbiform to paniculiform arrays. Peduncles usually glabrous, sometimes stipitate-glandular. Calyculi: bractlets 5–12+. Involucres ± campanulate, (7–)8–10(–11) mm. Phyllaries 8–13+, apices acuminate, abaxial faces piloso-hirsute (hairs 1–2+ mm), stellate-pubescent, and stipitate-glandular. Florets (6–)12–25+; corollas yellow, 9–10 mm. Cypselae columnar, 2.5–4 mm; pappi of 30–40+, stramineous bristles in ± 2 series, (4–)5–7 mm.
  • Flora of North America @ eFloras.org
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Diagnostic Description

Synonym

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Chlorocrepis albiflora (Hooker) W. A. Weber
  • Flora of North America @ eFloras.org
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Type Information

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Isotype for Hieracium helleri Gandoger
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Status verified by specimen annotations only
Preparation: Pressed specimen
Collector(s): A. A. Heller & E. G. Heller
Year Collected: 1898
Locality: Near Montesano., Grays Harbor, Washington, United States, North America
Elevation (m): 61 to 61
  • Isotype: Gandoger, M. 1918. Bull. Soc. Bot. France. 65: 51.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Hieracium albiflorum

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

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Conservation

Conservation Status

National NatureServe Conservation Status

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Canada

Rounded National Status Rank: N5 - Secure

United States

Rounded National Status Rank: N4 - Apparently Secure

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NatureServe Conservation Status

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Rounded Global Status Rank: G4 - Apparently Secure

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