ఆల్డర్ అనేది బెటులేసి (Betulaceae) కుటుంబానికి చెందిన ఒక పుష్పించే మొక్కల ప్రజాతి. ఇందులో సుమారు 30 జాతులకు చెందిన చిన్న పొదలు మరియు వృక్షాలు ఉన్నాయి.

Alder
Tagalder8139.jpg
Alnus serrulata (tag alder)
Male catkins on right,
mature female catkins left
Johnsonville, South Carolina
Scientific classification
Kingdom:
(unranked):
(unranked):
(unranked):
Order:
Family:
Genus:
Alnus

Species

About 20–30 species, see text.

వర్గీకరణసవరించు

ఈ జాతి మూడు ఉపజాతులుగా విభజించబడినది :

Subgenus Alnus :

 
Speckled alder (Alnus incana subsp. rugosa) —leaves
  • Alnus incana—grey alder, Eurasia
    • Alnus hirsuta (A. incana subsp. hirsuta) —Manchurian alder, northeastern Asia, and central Asia in mountains
    • Alnus oblongifolia (A. incana subsp. oblongifolia) —Arizona alder, southwestern North America
    • Alnus rugosa (A. incana subsp. rugosa) —speckled alder, northeastern North America
    • Alnus tenuifolia (A. incana subsp. tenuifolia) —thinleaf or mountain alder, northwestern North America
  • Alnus japonica—Japanese alder, Japan
  • Alnus jorullensis—Mexican alder, Mexico, Guatemala (one of the few evergreen species)
  • Alnus mandshuricaRussian Far East, China, Korea
  • Alnus matsumuraeHonshū (Japan)
  • Alnus nepalensis—Nepalese alder, eastern Himalaya, southwest China
  • Alnus orientalis—Oriental alder, southern Turkey, northwest Syria, Cyprus
  • Alnus pendula—Japan, Korea
  • Alnus rhombifolia—white alder, interior western North America
  • Alnus rubra—red alder, west coastal North America
 
Leaves of the tag alder

Subgenus Clethropsis. :

Subgenus Alnobetula. :

 
Green Alder (Alnus viridis)
  • Alnus viridis—green alder, widespread:
    • Alnus viridis subsp. viridis - Eurasia
    • Alnus viridis subsp. maximowiczii (A. maximowiczii) - Japan
    • Alnus viridis subsp. crispa (A. crispa) - northern North America
    • Alnus viridis subsp. sinuata (A. sinuata, Sitka alder or slide alder - western North America, far northeastern Siberia