11 (Mindeskrift i anledning af hundredaaret for Japetus Steenstrups fødsel / XXI. Types of Claytonia Gronov)

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we are not aware of any formae hebetaiae; as regards the centrales we presume these being
represented by the alpine, and high northern types, but the difficulty arises when making
an attempt to combine with these the perennial Limnia-species, Naiocrene and
Alsinastrum. Furthermore it seems doubtful whether the dwarfed annuals be regarded as
formae desciscentes. Therefore in venturing to present the following outlining of the species,
we wish this to be considered as a mere suggestion.

Claytonia.

Centrales	arctica, tuberosa megarrhiza, sarmentosa, Virginica, Caroliniana, lanceolata
	asarifolia, Sibirica the annual species of Limnia
Desciscetites	Naiocrene, Alsinastrum Montiastrum.

Thus we regard as fundamental species the high northern arctica and tuberosa,
represented also in the mountains of Altai; parallel with these may have been megarrhiza
and sarmentosa, and then: Virginica, Caroliniana and lanceolata. Types of a more recent
origin may be asarifolia and Sibirica passing into the annual species of Limnia. As
desciscentes we have placed Naiocrene and Alsinastrum, and parallel with these
Montiastrum. In this classification the large-rooted species with monopodial shoots, and with
both fore-leaves developed precede the slender-rooted asarifolia and Sibirica with
perennial rhizomes, monopodial shoots, and distinct fore-leaves; then follow the annual species
of Limnia of otherwise the same structure. Deviating from these is the bulbiferous
Naiocrene with monopodial shoot, but with the fore-leaves merely rudimentary;
furthermore the stoloniferous Alsinastrum with the fore-leaves of very unequal size, and with
the shoot terminated by an inflorescence, similar to Montiastrum, but in this only one
fore-leaf is developed in the shape of a small sheath.

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		Mindeskrift i anledning af hundredaaret for Japetus Steenstrups fødsel / XXI. Types of Claytonia Gronov / 11 (1914) Author: Hector Jungersen, Eugen Warming Table of Contents / Innehåll \| << Previous \| Next >>
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