Theodor Holm: Types of Claytonia Gronov. 11 



we are not aware of any formae hebetatae; 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 Alsina- 

 strum. Furthermore it seems doubtful whether the dwarfed annuals be regarded as for- 

 mae desciscentes. Therefore in venturing to present the foliowing outHning of the species, 

 we wish this to be considered as a mere suggestion. 



Claytonia. 



[ ardica, tuberosa 

 Centrales { megarrhiza, sarmentosa, Virginica^ Caroliniana^ 

 lanceolala 



asarifolia, Sibirica 



the annual species of Limnia 



Desciscentes 



j Naiocrene^ Alsinastrum 

 \ Montiastrum. 



Thus we regard as fundamental species the high northern arctica and tuberosa^ re- 

 presented also in the mountains of Altai; parallel with these may havo luen megarrhiza 

 and sarmentosa, and then: Virginica, Caroliniana and lanceolala. Types oi a niort» 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 Monti- 

 astrum. In this classification the large-rooted species with monopodial shoots, and with 

 both fore-leaves developed precede the slender-rooted asarifolia and Sibirica with peren- 

 nial rhizomes, monopodial shoots, anddistinct fore-leaves; then follow the annual species 

 of Limnia of otherwise the same structure. Devialing from these is the bulbiferous 

 Naiocrene with monopodial shoot, but with the fore-leaves merely rudimentary; further- 

 more the stoloniferous Alsinastrum witli the fore-leaves of very unequal »\7>\ ml with 

 the shoot terminated by an inflorescence, similar to Montiastrum, but in tins only one 

 fore-leaf is developed in the shape of a small sheath. 



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