338 DR. HOOKER ON THE DISTRIBUTION OF ARCTIC PLANTS. 



hardly tangible ; Leclebour, who keeps them distinct, thinks it would be better to unite 

 them. Meisner refers domesticus to longifolins, DC, and makes of the Arctic American 

 plant the var. nanus. 



B. salicifoUus, Weinm. I am doubtftil as to the merits of this species, and cannot come 

 to any conclusion about it. 



PoLYGOXUM 23olijniorplmm, Led., is not Scandinavian ; but several of its varieties are 

 Arctic Siberian and American, as /3. setigerum, y. lapathifolkmi, and frigldum (P. aljn- 

 nwn, ALL). 



P. lapathlfoliiim, lu Kept distinct from Tersicaria by Fries, Watson, Koch, and 

 Bentham ; but I find it impossible to distinguish North Indian specimens of one from 

 the other, these being united by every intermediate form. P. Fersicaria is, according 

 to Fries, very rare in Lapland, and sporadic only. 



Ledebour includes P. Sydropiper as Arctic Lapland on the authority of Felmann ; but 

 I find no confii-mation in the works of Fries and Andersson. 



Chenopodium maritiimim, L., is doubtfully mentioned as a native of the arctic sea-coast 

 of America by Richardson. I have examined the specimens ; they are very young, but 

 identical with maritlmum, which is a common subarctic plant. 



MoNOLEPis Asiatica, Moq. I know nothing of this plant. The only recorded habitats 

 I find are both Arctic Siberian, viz. Nishni Kolymsk and the Boganida River. 



Atbiplex patula, L., It is impossible to unravel the synonymy and distribution of this 

 plant and A. liastata, if, indeed, they really be distinct, which Moquin dovibts. Fries 

 keeps one liastata distinct, assigning it a place in the section with rugose seeds. Koch 

 distinguishes it by the cordate-triangular (not hastato-rhomboid) sinuate-toothed perigonia. 

 Moquin unites angustifolla with it. Bentham unites both these with deltoides, littoralls, 

 and erecta. See, for further remarks in reference to the British species. Woods (Proc. 

 Linn, for April 17, 1849), who observes that in several species the seeds are of two forms 

 in the same individual,— one form shghtly depressed, smooth, black and shining ; the 

 other (in larger lower perigonia) three times as large, more depressed, chesnut and 

 crinkled : he admits angustifoUa, patttla, deltoidea, and perhaps erecta. On the south- 

 east coasts of England, I recognize three very distinct forms, often growing intermixed, 

 viz. A. littoralls, L., A. patula, L. {erecta, Huds.), and angustifoUa, Smith (all fairly well 

 represented in English Botany). Of these the first and last are Arctic European and 

 Arctic W. American ; and lilioralis Arctic W. American only, though common in tem- 

 perate America. 



A. deltoidea, Bab. Moquin refers this to hastata; Fries makes a variety of this 

 (prostrata) a native of Lapland ; Watson includes its distribution under that of ptatula 

 (see remark's, ' Cybele,' ii. 324). 



A. angiistijolia, Sm. Moquin makes of tliis a synonym oi pattda; Watson keeps it 

 distinct, but says nothing in its favour ; Koch brings it to patula, and both to latifolia, 

 Wahl. 



A. Gmelini, C. A. M. A little-known plant, referable, according to Ledebour, to pattda, 

 but rather, I think, to littoralis, L., or perhaps to angustifoUa, Sm. 



