О таксономическом значении анатомических признаков коры в семействе Betulaceae s. lстатья
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Дата последнего поиска статьи во внешних источниках: 3 ноября 2021 г.
Аннотация:ON TAXONOMIC SIGNIFICANCE OF THE BARK ANATOMY IN THE FAMILY BETULACEAE s. l.
Bark anatomy has been investigated in 13 betulaceous species of all genera except Ostryopsis. Architecture of the non-conducting phloem determined by the stereom pattern is considered to be of taxonomic significance. Three patterns of stereom are recognized in Betulaceae s. l.: 1) stereom consists of only clustered sclereids; 2) stereom consists of both clustered sclereids and phloem fibers agregated in radial rows; 3) stereom consists of both clustered sclereids and phloem fibers agregated in tangential rows. The first pattern characterizes Alnus and Betula species. The second and the third are scattered among other species investigated. This is in accordance with the division of the betulaceous plants into two traditional subfamilies — Betuloideae (Betula, Alnus) and Coryloideae (Corylus, Carpinus, Ostrya, ?Ostryopsis).