Some Observations on the Floral Vascular Anatomy of Impatiens: Studies in Balsaminaceae: VI

Abstract

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Floral development in three species of Impatiens (Balsaminaceae)

“…From their position, he concludes that the anterolateral pair has been reduced. This is supported by the fact that in species with five sepals, the anterolateral pair is always smaller and thinner than the posterolateral one; moreover, it is positioned more to the inside (Grey- Wilson, 1980c). Our ontogenetic results from I. columbaria confirm the conclusions of Grey- Wilson (1980c): the rudimentary sepals develop in anterolateral position, and they are inserted somewhat higher up on the floral apex (more to the inside) when compared to the posterolateral sepals.…”

“…They find evidence for this hypothesis in the presence of a central incision in the upper margin of the bilobed structures. However, Grey-Wilson (1980c) proved on the basis of floral anatomy that each of the petals has its own independent vascular trace and that all petals develop separately. Our floral ontogenetic results support this conclusion: the lateral petals are formed from four separate petal primordia.…”

“…Grey- Wilson (1980c) studied the floral anatomy of Impatiens and found that some species contain rudiments of the vascular traces of the often-missing sepal pair. From their position, he concludes that the anterolateral pair has been reduced.…”

The biology of invasive alien plants in Canada. 9. Impatiens glandulifera Royle

“…Other common names include: Indian Balsam, policeman's helmet, jumping jack, jewelweed, 2. Description and Account of Variation (a) Species Description * The following description is based on characteristics of Canadian populations supplemented with published information (Fernald 1950;Clevenger 1971;Valentine 1971;Hitchcock and Cronquist 1973;Grey-Wilson 1980;Burbridge 1989;Beerling and Perrins 1993;Ennos et al 1993;Douglas et al 1998;Gilkey and Dennis 2001;Graham 2003). Annual herb from 0.6 m to 2 (3) m in height (Fig.…”

A combined chloroplast atpB–rbcL and trnL-F phylogeny unveils the ancestry of balsams (Impatiens spp.) in the Western Ghats of India

“…Impatiens is considered taxonomically as one of the most difficult genera of angiosperms, mainly due to hypervariable structure and fragile nature of its flowers making examinations of dried specimen extremely difficult (Grey-Wilson 1980). The important revision of the African taxa by Grey-Wilson (1980) distinguished six informal infrageneric groups for the African species for practical diagnosis.…”