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Alnus formosana (Burkill) Makino

Brief Summary

    Alnus formosana: Brief Summary
    provided by wikipedia
    Tree shape.jpg Infructescence.jpg

    Alnus formosana, or Formosan Alder, is a species of alder native to Taiwan. It is a medium-sized tree, up to 20 metres (66 ft) in height. It is a common species growing on riverbanks from near sea level to 2,900 metres (9,500 ft).

Comprehensive Description

    Alnus formosana
    provided by wikipedia
    Tree shape.jpg
    Infructescence.jpg

    Alnus formosana, or Formosan Alder, is a species of alder native to Taiwan. It is a medium-sized tree, up to 20 metres (66 ft) in height. It is a common species growing on riverbanks from near sea level to 2,900 metres (9,500 ft).[1]

    References

    1. ^ Pei-chun Li & Alexei K. Skvortsov. "Alnus formosana". Flora of China. Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. Retrieved 10 September 2012..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""'"'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}

    Alnus formosana (Burkill) Makino, Bot. Mag. (Tokyo). 26: 390. 1912. Alnus maritima (Marshall) Nuttall var. Formosan Burkill in FB Forbes and Hemsley, J. Linn. Soc., Bot. 26: 500. 1899; A. japonica (Thunberg) Steudel var. Formosan Callier. Trees up to 20 m in height; dark gray-brown bark. Purplish brown branches, glabrous, grooved; barely pubescent twigs. Stipitate outbreaks, with 2 scales glabrous vaults. Petiole 1.2-2.2 cm, slender pubescent, densely furrow; Elliptic or oblong-lanceolate Limbo, rarely ovate-oblong, 6-12 × 2–5 cm, abaxially bearded in axils, lateral veins adaxially subglabrous, rounded or broadly cuneate base, irregularly minutely serrated margin, acuminate or acute apex; lateral veins 6 or 7 on each side of the midrib. One female inflorescence, or 2-4 in a cluster, ellipsoid, 1-2.5 cm; peduncle 3–5 mm, robust; bracts 3–4 mm, woody, cuneate base, rounded apex 5-lobed. Nutlet obovate, 2–3 mm, papery wings 1 / 4-1 / 3 as wide as nutlet. Fl. May–June, fr. July–September

    • Riverbanks, forming pure, common masses; sea level, about 2,900 m. Taiwan (Tanshui)
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Distribution

    Distribution
    provided by eFloras
    Taiwan (Tanshui)

Morphology

    Description
    provided by eFloras
    Trees to 20 m tall; bark dark gray-brown. Branches purplish brown, glabrous, striate; branchlets sparsely pubescent. Buds stipitate, with 2 glabrous, ribbed scales. Petiole 1.2-2.2 cm, slender, densely pubescent in furrow; leaf blade elliptic or oblong-lanceolate, rarely ovate-oblong, 6-12 × 2-5 cm, abaxially bearded in axils of lateral veins, adaxially subglabrous, base rounded or broadly cuneate, margin irregularly minutely serrate, apex acuminate or acute; lateral veins 6 or 7 on each side of midvein. Female inflorescence 1, or 2-4 in a raceme, ellipsoid, 1-2.5 cm; peduncle 3-5 mm, robust; bracts 3-4 mm, woody, base cuneate, apex rounded, 5-lobed. Nutlet obovate, 2-3 mm, with papery wings 1/4-1/3 as wide as nutlet. Fl. May-Jun, fr. Jul-Sep.

Diagnostic Description

    Synonym
    provided by eFloras
    Alnus maritima (Marshall) Nuttall var. formosana Burkill in F. B. Forbes & Hemsley, J. Linn. Soc., Bot. 26: 500. 1899; A. japonica (Thunberg) Steudel var. formosana Callier.

Habitat

    Habitat
    provided by eFloras
    * Riverbanks, forming pure stands, common; near sea level to 2900 m.