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Rhododendron prinophyllum (Small) Millais
EARLY AZALEA
Life   Plantae   Dicotyledoneae   Ericaceae   Rhododendron

Rhododendron prinophyllum, roseum
© Les Mehrhoff, 2008-2010 · 8
Rhododendron prinophyllum, roseum

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Rhododendron prinophyllum, Whole tree
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Rhododendron prinophyllum, Whole tree
Rhododendron prinophyllum, roseum
© Les Mehrhoff, 2008-2010 · 3
Rhododendron prinophyllum, roseum

Rhododendron prinophyllum, roseum
© Les Mehrhoff, 2008-2010 · 3
Rhododendron prinophyllum, roseum
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FNA | Family List | FNA Vol. 8 | Ericaceae | Rhododendron

20. Rhododendron prinophyllum (Small) Millais, Rhododendrons. 229. 1917.

Roseshell or early azalea, election-pink

Azalea prinophylla Small in N. L. Britton et al., N. Amer. Fl. 29: 42. 1914

Shrubs , to 3(-5) m, usually not rhizomatous. Stems: bark smooth to vertically furrowed, shredding; twigs scattered, multicellular eglandular-hairy (hairs unbranched), other-wise densely to sparsely unicellular-hairy. Leaves deciduous; petiole usually multicellular eglandular-hairy and unicellular-hairy; blade ovate to obovate, 3-9 × 1.2-3.7 cm, thin, membranous, margins entire, plane, conspicuously ciliate, eglandular-hairy (hairs ascending away from margins), apex acute to obtuse, often mucronate, abaxial surface sparsely to densely unicellular-hairy, sometimes also eglandular-hairy, adaxial surface usually sparsely unicellular-hairy, sometimes glabrous, often also scattered eglandular-hairy. Floral bud scales very sparsely to densely unicellular-hairy abaxially, especially near midvein, margins unicellular-ciliate. Inflorescences 4-13-flowered; bracts similar to bud scales. Pedicels 5-26 mm, usually stipitate-glandular-hairy, or, sometimes, also eglandular-hairy, otherwise sparsely to moderately unicellular-hairy. Flowers opening before or with leaves, erect to horizontal, fragrant (spicy-scented); calyx lobes 0.5-4 mm, surfaces and margins scattered stipitate-glandular- and/or eglandular-hairy, otherwise sparsely to densely unicellular-hairy; corolla usually bright pink, without blotch on upper lobe, funnelform, 25-45 mm, scattered, multicellular stipitate-glandular-hairy (hairs not form-ing distinct lines), otherwise sparsely to moderately unicellular-hairy on outer surface, petals connate, lobes 10-23 mm, tube gradually expanded into lobes, 11-27 mm (equaling or longer than lobes); stamens 5, much exserted, ± unequal, 32-53 mm. Capsules borne on erect pedicel, 10-28 × 3-7 mm, stipitate-glandular-hairy, otherwise sparsely unicellular-hairy. Seeds without distinct tails, flattened portion of testa well developed at each end; testa expanded, dorsiventrally flattened, ± loose. 2 n = 26.

Flowering spring. Acidic thickets or bogs, swampy to dry, rocky woods, bluffs, ravines, or along streams; 100-1500 m; Ala., Ark., Conn., Ill., Ky., Md., Mass., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., Tenn., Tex., Vt., Va., W.Va.

Rhododendron prinophyllum is unusual in its strongly disjunct distribution. Plants in the western portion of the range often have longer corolla tubes and are most similar to R. canescens and R. periclymenoides , and can be distinguished from both by their broader, more gradually expanded corolla tubes and usually consistently glandular sepal margins, pedicels, and ovaries. Hybrids are known with R. calendulaceum and R. periclymenoides . The name R. roseum (Loiseleur) Rehder, which has been used for this species, is illegitimate because it was superfluous when published (K. A. Kron 1989).

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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Rhododendron+prinophyllum&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Rhododendron+prinophyllum&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 4
Query: SELECT * FROM img WHERE ready=1 and taxon like "Rhododendron prinophyllum%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Rhododendron prinophyllum
Rhododendron prinophyllum
Mountain Azalea
ID: 0000 0000 1106 0862 [detail]
© 2006 Ron Thomas

Rhododendron prinophyllum
Rhododendron prinophyllum
Mountain Azalea
ID: 0000 0000 1106 0864 [detail]
© 2006 Ron Thomas

Rhododendron prinophyllum
Rhododendron prinophyllum
Mountain Azalea
ID: 0000 0000 1106 0865 [detail]
© 2006 Ron Thomas

Rhododendron prinophyllum
Rhododendron prinophyllum
Mountain Azalea
ID: 0000 0000 1106 0866 [detail]
© 2006 Ron Thomas

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