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Alnus maritima

Alnus maritima (Robert H. Mohlenbrock. USDA NRCS. 1995.)

Cladus: Eukaryota
Regnum: Plantae
Divisio: Magnoliophyta
Classis: Magnoliopsida
Ordo: Fagales
Familia: Betulaceae
Subfamiliae: Betuloideae
Genus: Alnus
Subgenus: Alnus subg. Clethropsis
Species: Alnus maritima


Alnus maritima (Marsh.) Muhl. Nutt.


USDA, NRCS. 2006. The PLANTS Database, 6 March 2006 (http://plants.usda.gov). Data compiled from various sources by Mark W. Skinner. National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

Vernacular names
English: Seaside Alder
Türkçe: Sahil kızılağacı


Alnus maritima (also called Seaside Alder) is a species of plant in the Betulaceae family. Alnus maritima is endemic to the United States, and is found naturally in three disjunct populations in Oklahoma, Georgia, and in Maryland and Delaware on the Delmarva Peninsula. In 2002, the three populations were recognized as subspecies and given the names Alnus maritima subsp. oklahomensis, Alnus maritima subsp. georgiensis, and Alnus maritima subsp. maritima, respectively.[1] While some believe that subspecies maritima is the oldest of the three subspecies and that the other two disjunct populations resulted from some form of long distance dispersal, evidence from morphometric and phylogeographic studies indicates that the Oklahoma population (subsp. oklahomensis) is in fact the most ancestral and that the species probably had a wide, continuous distribution across the United States in the past. [1][2]

Alnus maritima is considered a large shrub or small tree and is the only autumn-blooming member of its genus native to North America. All other North American alders bloom in the spring. The autumn-blooming phenology is a characteristic that Alnus maritima shares with two old-world Alnus species, Alnus nitida and Alnus nepalensis, which are endemic to southeast Asia. This profound similarity in their timing of anthesis has led to their classification as the only three members in the subgenus Clethropsis.[1]


* World Conservation Monitoring Centre 1998. Alnus maritima. 2006 IUCN Red List of Threatened Species. Downloaded on 20 August 2007.


1. ^ a b c Schrader, J.A. and W.R. Graves. 2002. Infraspecific systematics of Alnus maritima (Betulaceae) from three widely disjunct provenances. Castanea 67: 380–401.
2. ^ Schrader, J.A. and W.R. Graves. 2004. Systematics of Alnus maritima (seaside alder) resolved by ISSR polymorphisms and morphological characters. J. Amer. Soc. Hort. Sci. 129: 231–236.

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