26 C. H. OSTENFELD. M.-N. KI. 
Samojed. cisural., 1846, p. 42; J. LANGE, Consp. Fl. Groenl., 1880, p. 103; 
an Pyrethrum ambiguum LEDEB.? 
Pyrethrum inodorum, var. pumilum, Raz, Wollaston-Victoria Land. 
In full bloom in the beginning of August (Aug. 6th 1904, Aug. rst— 
roth in 1905) and with scapes from the foregoing year. 
The synonymy above shows the identity of Hooker’s Chrysanthemum 
grandiflorum with Ruprecut’s Matricaria inodora var. phæocephala. From 
this it follows, that this arctic variety (or subspecies) of Matricaria inodora 
has a circumpolar distribution. | 
I have seen specimens from Fern Bay and Neerto Nakto (collected 
by Parry) in the Copenhagen Herbarium: upon these plants Hooker 
(I. c., 1825) based his new species of which he says that it is distinguished 
from Chrysanthemum inodorum »by its diminutive stature, simple stem, 
and the broad black scariose margin to the scales of the involucre« 
(I. c., p. 398). His diagnosis of the var. 8, nanum in Fl. Bor. Am. is much 
more meagre, viz.: »caule unifloroc. — RUPRECHT (I. c., pp. 42—43) in his 
Flores Samojedorum cisuralensium says about his new variety: »Licet 
nostra quod staturam et diramificationem valde variabilis est, 
tamen in pluribus specc. e 12 diversis locis maris glacialis reportatis et 
alibi etiam a me examinatis numquam squamas anthodii margine scarioso 
pallescente ut in communi planta ruderali, sed fusco-nigricante et plerum- 
que latissimo ornatas video«. It will be evident from these quotations that 
Ruprecut and Hooker were both aware of the most important character 
separating our form from the typical M. inodora, viz. the broad, black or 
at least dark scariose margin of the involucral scales; but RUPRECHT has 
much better understood the variability in the other characters of the form 
in question. Nevertheless it is necessary to use the oldest, Hookerian name. 
Perhaps the variety is the same as Pyrethrum ambiguum LEDEBOUR, 
Fl. altaica, IV, 1833 p. 118; at least it is identical with the plant of this 
name from Kola Peninsula distributed from the R. Botanical Garden of 
St. Petersburg, a plant which I have had in cultivation here in Copen- 
hagen. Further it is most likely that Matricaria inodora, var. borealis 
Hartman, Handb. Skandinav. F1, ed. 5, 1849 belongs here. 
Lastly it may be that our form is the more northern representative 
of the coast-plant which has been named M. maritima L., sp. pl, 1753, 
p. 1256, and which nowadays is taken as a perennial variety of M. inodora. 
Taraxacum HALL. 
63. Taraxacum hyperboreum DAHLSTEDT, n. sp., Fig. 18. 
Planta humilis vulgo 1—1,5 cm. alta. 
