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单词 betulaceae
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Betulaceae


Thesaurus
Noun1.Betulaceae - monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis)Betulaceae - monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis)birch family, family Betulaceaehamamelid dicot family - family of mostly woody dicotyledonous flowering plants with flowers often unisexual and often borne in catkinsFagales, order Fagales - an order of dicotyledonous trees of the subclass HamamelidaeBetula, genus Betula - a genus of trees of the family Betulaceae (such as birches)Alnus, genus Alnus - aldersCarpinaceae, family Carpinaceae, subfamily Carpinaceae - used in some classification systems for the genera Carpinus, Ostryopsis, and OstryopsisCarpinus, genus Carpinus - mostly deciduous monoecious trees or shrubs: hornbeams; sometimes placed in subfamily Carpinaceaegenus Ostrya, Ostrya - deciduous monoecious trees of Europe and Asia and America; sometimes placed in subfamily or family Carpinaceaegenus Ostryopsis, Ostryopsis - deciduous monoecious shrubs of China and Mongolia resembling trees of the genus Ostrya; sometimes placed in subfamily or family CarpinaceaeCorylaceae, family Corylaceae, subfamily Corylaceae - used in some classification systems for the genus CorylusCorylus, genus Corylus - deciduous monoecious nut-bearing shrubs of small trees: hazel; sometimes placed in the subfamily or family Corylaceae

Betulaceae


Betulaceae

[‚bech·ə′lās·ē‚ē] (botany) A small family of dicotyledonous plants in the order Fagales characterized by stipulate leaves, seeds without endosperm, and by being monoecious with female flowers mostly in catkins.
white birch

white birch

Trees have paper-like bark. Snapped twigs have wintergreen aroma. Bark and twig tea used for lung problems, sore muscles, joint pain, skin fungus, cracked heels, bladder and urinary issues, stomach aches, laxative, diuretic, colds, fever, rheumatism, diarrhea, tumors, cancer, anti-viral, anti-inflammatory, skin cancer. Birch tea has been historically used in enemas. Worm-like flowers (catkins) also edible.

Betulaceae

 

a family of monoecious, dicotyledonous plants.

Betulaceae are trees or shrubs with alternate leaves and early falling stipules. The flowers are small, plain, unisexual, anemophilous, and gathered into compound, catkin-like inflorescences consisting of extremely vestigial dichasia (two or three flowered). The staminal (male) catkins are pendulous, long, and cylindrical; the pistillate (female) ones are more or less upright, shorter than the staminal ones, and cylindrical or oval. The ovary is on top. The fruit is nutlike, winged, or wingless. There are two genera of Betulaceae: Betula (birch) and Alnus (alder). The number of species is very approximate (because of highly developed hybridization of the birch) but is close to 200. Betulaceae are distributed chiefly in the nontropical regions of the northern hemisphere, but they are also found in southern Asia and in America as far south as Chile and Argentina. Both the birch and the alder are important timber-forming species. Sometimes the hazels are included in the Betulaceae family as a special subfamily.

REFERENCES

Flora SSSR, vol. 5. Moscow-Leningrad, 1936.
Winkler, H. “Betulaceae.” In Das Pflanzenreich, fasc. 19. Leipzig, 1904.

M. E. KIRPICHNIKOV

Betulaceae


Betulaceae

(bech″ŭ-lās′ē-ē″) [ Betula + -aceae] The family of flowering trees that include birches and beeches. Tree pollen from members of this family produces allergic reactions in many people in the early spring.
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