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Geographical variation in fruit morphology in Swedish Callitriche hermaphroditica (Callitrichaceae)
Author(s) -
Martinsson Karin
Publication year - 1991
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.1991.tb01257.x
Subject(s) - herbarium , biology , botany , taxonomy (biology) , biogeography , geographic variation , morphology (biology) , variation (astronomy) , ecology , zoology , demography , population , physics , sociology , astrophysics
The differentiation of Callitriche hermaphroditica in Sweden expressed in fruit morphology has been studied. Variation among 50 wild‐scored populations is illustrated by canonical variates analysis and cluster analysis and shown to be geographically correlated. Two major geographical races differing in fruit size are distinguished and confirmed by the study of herbarium collections. The anatomy of the fruits is described, based on light microscopical studies. An anatomically aberrant fruit form was found in two different areas in Sweden. Comparisons are made with herbarium collections from Denmark, Norway, Finland and Soviet Karelia. The biogeography, in the light of postglacial events, and the taxonomy of C. hermaphroditica are discussed and a distribution map of C. hermaphroditica s. lat. in Sweden is presented.