242 



This plant is closely related to the preceding species^ with which Herder proposed 

 even to unite it. According to the descriptions given by I)e Candolle and Ruprecht, it 

 differs from A. Ptarmica, var. speciosa, in the following characters: — teeth of the leaves 

 more prominent and not incurvedly appressed; peduncle elongated; rays 8-9, obovate- 

 elliptical; chaff on the receptacle oblong, serrate from the middle upward, fuscous, and 

 subtrifid at the apex. 



141. Chrysanthemum arcticum, L. Sp. ed. 2, p. 889; Hook. Fl. Bor.-Am. I, p. 319; A. 



Gray, Synop. Fl. i, p. 365. Leucanthemum arcticum, DC. Prodr. vi, p. 45; 

 Ledeb. Fl. Ross, n, p. 541; Max. Prim. Fl. Amur. p. 155; Fr. & Sav. Enum. 

 i, p. 234. 



Hab. Urwpl (ex Max.). Htorofu, on rocky cliffs at Tsurubetsu. 



Professor Maximo wicz kindly informs me that his Urup specimen is of "the large- 

 headed form with pinnatifid leaves of Hakodate." My Etorofu plant is also of the same 

 form. 



Distrib. In northeastern Asia: coast regions of Manchuria, Saghalin, northern Japan ; 

 all around the Ochotsk Sea, Kamtschatka. and adjacent islands to the Behring Strait. 

 In North America, from arctic Alaska along the arctic shores to Hudson Bay; also in 

 eastern Lapland, and arctic Russia. 



142. Matricaria ambigua, Ledeb. Fl. Alt. iv, p. 118, and Fl. Ross, n, p. 547 (under Pyre- 



thrurri). CJunncemelum limosum, Max. Prim. Fl. Amur. p. 156. Cliamozmelon 

 tetragonospermum, F. Schm. Fl. Sach. p. 148. Tripleurospermum ambiguum, 

 Fr. & Sav. Enum. I, p. 236. Tripleurospermum inodorum,vav. ambiguum, Her- 

 der, PI. Radd. in, 2, p. 42. 

 Hab. Shilcotan, in grassy places about the harbor. 



Distrib. Northern Europe and Asia, extending southward to southwestern Siberia 

 and the Altai region, and to Manchuria, Saghalin and northern Japan; according to 

 Herder also at Kotzebue Sound in Alaska. 



143. Matricaria discoidea, DC. Pr odr. vi, p. 50; Ledeb. Fl. Ross, n, p. 544; A. Gray, 



Synop. Fl. i, p. 364; Reg. & Til. Fl. Ajan. p. 102. 

 Hab. Urup ! (ex Max.) . 



Distrib. Eastern Siberia in the Ochotsk region, Kamtschatka, and the Kurile Islands; 

 through the Aleutian Islands and Alaska to western California, thence to Montana ; 

 now naturalized in the Atlantic states of North America, and in northern and middle 

 Europe. 



144. Artemisia laciniata, Willd. Sp. in, p. 1843; Besser, Tent. Abrot. p. 40; Ledeb. Fl. 



Ross, n, p. 581; Max. Mel. Biol, vin, p. 530. — Var. laciniata, Max. I. c.l 



Hab. Shilcotan, on cliffs along the harbor. 



Distrib. In Siberia from the Altai to the Ochotsk region; also in Dahuria, Mongolia, 

 eastern Manchuria, and the southern Kuriles. 



145. Artemisia glomerata, Ledeb. in Mem. Acad. Petersb. v, p. 564, Fl. Ross, n, p. 588; 



Bess. Abrot. p. 63; Max. Mel. Biol, vm, p. 532; A. Gray, Synop. Fl. i, p. 370. 



A. leontopodioides, Fisch. ex Besser, Abrot. p. 63. 

 Hab. Kurile Islands! (Pallas ex Max.). 



