321 DR. HOOKER ON THE DISTRIBUTION OF ARCTIC PLANTS 
inflato membranaceo nigro-piloso calyce 3-4-plo longiore, sutura carinali haud in- 
trusa. — G. B. 
Hab. Eschscholtz Bay, in Kotzebue's Sound, Seemann. 
In many respects similar, especially in habit, stipules, and form, to A. alpinus, L., but 
always more glabrous, with more deeply emarginate or almost bilobed leaflets, fewer 
flowers, longer calyx, narrower petals, shorter keel, almost sessile ovary, and widely dif- 
ferent pod, which is broadly linear oblong, not pendent, inflated, fully an inch long, and 
rounded at the ends. 
The introduction of a perfectly new and distinct arctic plant into the supplementary 
observations appended to this paper requires some notice here. I am indebted for it to 
to Dr. Seemann, who pointed it out to me, on his return from the Fiji Islands (after the 
first part of this paper was printed), as a plant omitted in his Botany of the ' Voyage 
of the Herald,' and as that alluded to by him as Oxytropis polaris in the narrative 
of that voyage. It is so like Astragalus alpinus, that it had been mixed with specimens 
of that plant, which is abundant throughout Eskimo-land. I have sought in vain, 
through a very large suite of specimens of A. alpinus and oroboides (which it also in 
many respects resembles), for another specimen of polaris ; it must therefore at present 
be considered as an addition (eighth) to the small list of peculiarly arctic plants men- 
tioned at p. 258, and the sixth to the species peculiar to Arctic N. W. America enume- 
rated at p. 267. 
Oxytropis campestris, DC. Many names are included under this* which represent 
species, varieties, and synonyms in the opinions of different authors. Of these, 0. borealis, 
DO, is referred (with O. sordida) to campestris by Ledebour. Of O. Middendorffii, Trautv., 
I have seen no authentic specimens ; but Trautvetter's plate appears to identify it with 
a not uncommon form of the same plant. 
O. sordida, Pers. The plant of Pries, < Herb. Normale,' is undoubtedly referable to 
campestris ; Ruprecht (Flor. Samojed.) goes at length into its characters, describes it as 
O. campestris 
Led., from the Gulf of St. Lawrence. This latter 
Ruprecht refers to borealis, DC, which differs from 
a 
the glandular 
cose parts, and calyx covered densely with black hairs," — all very inconstant characters 
in arctic specimens. Nyman and Fries put O. sordida under campestris. Koch and 
Ledebour both regard it as a variety, j3. sordida. 
O. polaris, Seem., alluded to (but not described) in Seemann's « Narrative of the 
Voyage of the Herald,' is founded in error. See Astragalus polaris, supra. 
O. arctica, Br. Ruprecht appears to refer the Arctic Siberian and Kotzebue Sound 
plant of this name to O. sordida. Ledebour refers Brown's arctica of Arctic America to 
a form of Uralensis. Torrey and Gray follow * Flora Boreali- Americana,' in keeping it 
distinct, with the observation that it probably does not differ from Uralensis. 
O. nigrescens, Fisch. This is certainly a very distinct and remarkable form ; but I much 
doubt its permanent distinctness from O. Uralensis. In the ' Flora Boreali- Americana ' it 
is regarded as probably very nearly allied to arctica {Uralensis). 
SpiRiEA chamadrifolia, L. The only apparently Arctic European habitat which I find 
