Overview

Comprehensive Description

Nomenclatural History

 

Azalea lapponica Linnaeus, Sp. PI. 151 (1753). Described from Lapland. A. ferruginosa Pallas, Fl. Ross. 2: pi. 70 fig. 1A, B (1788). R. parvifolium Adams, Nouv. Mem. Soc. Nat. Mosc. 9:237 (1834). R. palustre Turczaninow in Bull. Sci. Nat. Mosc. 11:96 (1838). R. parviflorum F. Schmidt, Fl. Sachal. 158 (1868).. Azalea parvifolia (Adams) Kuntze, Rev. Gen. 2:387 (1891). R. confertissimum Nakai, Bot. Mag. Tokyo 31:239 (1917)

 
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Distribution

 

Scandinavia, ussr (Siberia), usa (Alaska), Canada, Greenland, with outliers in c USA and Canada (British Columbia)

 
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Distribution

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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Heilongjiang, Jilin, Liaoning, Nei Mongol [Japan, N Korea, Mongolia, Russia (Siberia); N Europe (Scandinavia), N North America (Canada, Greenland, N United States)].
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Physical Description

Morphology

Description

Small, much-branched prostrate or erect shrubs, 0.2–0.45(–1) m tall. Petiole 1.5–4 mm, scaly; leaf blade oblong-elliptic, ovate-elliptic to oblong-obovate, 0.4–1.5(–2.5) × 0.2–0.5(–0.9) cm; base broadly cuneate; apex obtuse or rounded, mucronate; abaxial surface fawn to reddish brown, scales contiguous or overlapping, 2-colored, pale brown or ferruginous, nearly equal in number and intermixed; adaxial surface pale green, matt, densely scaly. Inflorescence (2–)3–5(–6)-flowered. Pedicel 0.3–1.2 cm, scaly; calyx reddish or purple; lobes (0.5–) 1–2 mm, deltoid or rounded, persistent in fruit, scaly, margin ciliate and rarely scaly; corolla broadly funnelform, violet rose to purple or rarely white, (0.65–)0.7–1.3(–1.6) cm, tube (1.5–) 2–5(–6) mm, outer surface glabrous, throat pubescent; stamens 5–10, filaments pubescent towards base; ovary ca. 1.2 mm, densely scaly; style 1.1–1.5 cm, longer than stamens, glabrous. Capsule cylindric-ovate, 3–6 mm, densely scaly. Fl. May–Jul, fr. Sep–Oct.
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Diagnostic Description

 

Much branched prostrate or erect shrub to 1 m. Leaves 4-20(-25) x 2-7(-9) mm, oblong-elliptic to elliptic-ovate, apex obtuse or rounded, mucronate (sometimes obscurely so), base cuneate, undersurface fawn to ferrugineous, the contiguous scales bicolorous, either straw-coloured to fawn, or ferrugineous, the two colours occurring in various proportions. Inflorescence 3-6-flowered, pedicels lepidote, 3-12 mm. Calyx 1-2 mm, lobes deltoid, variably lepidote, margin ciliate. Corolla violet-rose to purple or sometimes white, broadly funnel-shaped, pubescent in the throat, (6-5-)7-5-14(-15) mm, tube (1-5-)2-5(-6) mm. Stamens 5-10, filaments pubescent towards the base. Ovary lepidote, style 10.5-15 mm, exceeding the stamens, glabrous. Capsule ovoid, 4-6 mm, lepidote.

 
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Ecology

Habitat

Arctic regions, mountain tundra, bogs, peat or moss lands, clayey soils, other damp places; sea level to 1900 m.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Rhododendron lapponicum

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 9
Specimens with Barcodes: 27
Species With Barcodes: 1
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Conservation

Conservation Status

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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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Wikipedia

Rhododendron lapponicum

Rhododendron lapponicum (Lapland rosebay, 高山杜鹃) is a rhododendron species found in subarctic regions around the world, where it grows at altitudes ranging from sea level to 1900 meters. It is a shrub that grows to 0.2–0.45 m in height, with leaves that are oblong-elliptic or ovate-elliptic to oblong-obovate, 0.4–1.5 by 0.2–0.5 cm in size. Flowers are reddish or purple.

Synonyms[edit]

  • Azalea lapponica L.
  • Rhododendron confertissimum Nakai
  • Rhododendron lapponicum subsp. parvifolium (Adams) T. Yamaz.
  • Rhododendron palustre Turcz.
  • Rhododendron parviflorum F. Schmidt
  • Rhododendron parvifolium Adams
  • Rhododendron parvifolium subsp. confertissimum (Nakai) A.P. Khokhr.

References[edit]


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