Difference between revisions of "Alnus maritima"
N. Amer. Sylv. 1: 50. 1842.
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}}{{Treatment/ID/Special_status | }}{{Treatment/ID/Special_status | ||
|code=F | |code=F | ||
| − | |label= | + | |label=Illustrated |
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|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Betula-alnus maritima | |name=Betula-alnus maritima | ||
|authority=Marshall | |authority=Marshall | ||
| + | |rank=species | ||
|publication_title=Arbust. Amer., | |publication_title=Arbust. Amer., | ||
|publication_place=20. 1785 | |publication_place=20. 1785 | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Alnus maritima | name=Alnus maritima | ||
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|authority=(Marshall) Muhlenburg ex Nuttall | |authority=(Marshall) Muhlenburg ex Nuttall | ||
|rank=species | |rank=species | ||
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|publication title=N. Amer. Sylv. | |publication title=N. Amer. Sylv. | ||
|publication year=1842 | |publication year=1842 | ||
| − | |special status=Endemic; | + | |special status=Endemic;Illustrated |
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V3/V3_590.xml |
|subfamily=Betulaceae subfam. Betuloideae | |subfamily=Betulaceae subfam. Betuloideae | ||
|genus=Alnus | |genus=Alnus | ||
Revision as of 21:29, 16 December 2019
Shrubs or trees, to 10 m; crowns narrow. Bark light gray, smooth; lenticels small, inconspicuous. Winter buds stipitate, ovoid to ellipsoid, 2.5–5 mm, apex rounded; stalks 1–3 mm; scales 2–3, subequal, often poorly developed, heavily resin-coated. Leaf blade narrowly elliptic, oblong, or narrowly obovate, 4.5–9 × 2–5 cm, leathery, base acute to cuneate, margins flat, teeth low, single, relatively distant, apex acute, obtuse, or rounded; surfaces abaxially mostly glabrous, resin-coated when young. Inflorescences: catkins formed during same season as flowering; staminate catkins in 1 terminal cluster of 2–4, 2–6 cm; pistillate catkins solitary in leaf axils proximal to staminate catkins. Flowering in late summer or early fall. Infructescences ovoid, 1.2–2.8 × 1.2–2.2 cm; peduncles 5–10 mm. Samaras elliptic, wings reduced to narrow, leathery ridges. 2n = 28.
Phenology: Flowering late summer–early fall.
Habitat: Along edges of ponds and small streams, often in standing water
Elevation: 0–100 m
Distribution
Del., Md., Okla.
Discussion
Alnus maritima consists of widely disjunct populations in Delaware, Maryland, and southern Oklahoma. The populations probably represent remnants of Pleistocene and post-Pleistocene distributions and migrations. It is our only member of the predominantly Asian fall-blooming Alnus subg. Clethropsis.
Selected References
None.