1967
Cytotaxonomic studies in the genus Symphytum. I. Symphytum officinale L. in the Netherlands
Publication
Publication
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht , Volume 275 - Issue 1 p. 378- 391
The genus Symphytum contains about 25 species (Bucknall, 1913). In the Netherlands it is represented by one indigenous species, S. officinale L.; two others, S. asperum Lepech. and S. bulbosum Schimp., have been introduced but have not become established. S. officinale is a variable species. Keener (1863) described a segregate, S. uliginosum, which was reduced to subspecific rank by Nyman (1878): S. officinale L. ssp. uliginosum (Kern.) Nym. The differences between subspecies officinale and uliginosum are: in ssp. officinale the stems and leaves are more or less densely hispid, in ssp. uliginosum they are provided with small white deciduous prickles with tubercular base. Furthermore in the first-mentioned ssp. the upper stem-leaves are entirely decurrent but in the last named they are not or partially decurrent. There is also a difference in the colour of the flowers: white, yellowish, or dark purple in ssp. officinale, and red-purple or violet in ssp. uliginosum.
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Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht | |
Released under the CC-BY 4.0 ("Attribution") License | |
Organisation | Naturalis journals & series |
Gadella, T. W. J., & Kliphuis, E. (1967). Cytotaxonomic studies in the genus Symphytum. I. Symphytum officinale L. in the Netherlands. Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 275(1), 378–391. |