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- Betula occidentalis Hook. (Береза западная, Betulaceae)
Betula occidentalis Hook. (Береза западная, Betulaceae)
Synonyms: Betula fontinalis Sarg.
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- Pollen unit: monad
- Size: medium
- Sculpture type: scabrate
- Aperture number: 3
- Aperture location: zonoaperturate
- Aperture type: porus
- Features: поры камерные
- Этикетка: 5664 California, Trail Canyon,White Mts.,Nevada, coll.V.Duran,12 June,1930