Nardosmia. COMPOSITiE. 93 



tomentose ; the lobes at the base dlverginn;. DC. — Hook. ! fl. Bor.-Am. 1. 

 p. 307 (excl. 13. ?); DC. prodr. 5. p. 205. N. aiigulosa, Cass. did. l. c. ; 

 Less, in Linnaa, 6. j}. 107. Tussihigo frigida, Linn.; Ft. Dan. t, 61 ; 

 Pursh, Jl. 2. p. 531. T. scapo imbricato, &c. Gmel. fl. Sibir. 2. p. 

 150, t. 70. 



Arctic America, from lat. 66°, Richardson! Kotzebue's Sound! and Una- 

 laschka ! to Lake Wiiiipeg, lat. 52°, the mountains of Canada, and the 

 highest mountains of Vermont and New Hampshire, according to Pursh. 



2. N. rorymhosa (Hook.) : leaves cordate, siniiate and acutely denticulate, 

 oblong, acute, glabrous above, tomentose beneath ; the lobes at the base di- 

 verging. DC. — Hook. ! I. c. ; DC. jjrodr. 5. p. 206. Tussilago corym- 

 bosa, Jl. Br.! in Parry's 1st voy. sujtpl. p. 269; Hook, t^' Am !'bot. 

 Beechey, p. 126. 



Arctic America, from Melville Island ! to Kotzebue's Sound ! and south to 

 Fort Norman, in about lat. 65°. — Corymb with few heads. 



3. N. sagiltata (Hook.) : leaves oblong, acute, sagittate, entire ; the lobes 

 obtuse, DC. (leaves cordate or reniform-sagittate, sinuate-toothed, tomentose 

 beneatli. Hook. ! I. c. — Tussilago sagittata, Pursh, Jl. 2. p. 332. 



Hudson's Bay (Hulchinsoj\), Pursh. Svvamp.s in the Rocky Mountains 

 {Drummond .') and from Lake Superior in lat. 48°, to Fort Franklin in lat. 

 66°, Richardson. — With numerous specimens bef()re us, we strongly suspect 

 (as Hooker also does) that this and the two preceding are in reality one 

 species. Hooker's N. sagittata has deeply toothed leaves, which are some- 

 times reniform. Can it be the same as Pursh's plant with "foliis in- 

 tegerrimis" ? 



4. N. pahnata (Hook.) : leaves reniform or roundish-cordate, tomentose 

 beneath, palmately 5-7-lobed ; the segments coarsely toothed, often incised 

 or somewhat lobed. — Hook. ! Jl. Bor.-Am. \. p. 308; DC. I. c. N. pal- 

 mata, Hookeriana, & speciosa, Nutt. ! in trans. Amer. phil. soc. (n. ser.) 7. 

 p. 288. Tussilago palmata, Ait. Kew. (ed. I) 3. p. 188, t. 2 ; Willd. ! spec. 

 3. p. 1972 ; Pursh! jl. 2. p. 531 ; Beck, hot. p. 199. 



Swamps and shady banks of streams, Newfoundland & Labrador! and 

 from Bear Lake, lat. 67°, to the Rocky Mountains ! and to the Pacific at the 

 mouth of the Oregon ! Also Lake Huron and Maine, Nuttall. Fairhaven, 

 Vermont, Mr. Robhins ! Prof. Beck. Sunderland, Massachusetts, ProJ. 

 Hitchcock! Saratoga, New York, Dr. Steele! April-May. — Leaves some- 

 times 10 to 12 inches in diameter, when fully developed. Scape stout, 6-20 

 inches high, with numerous leaf-sheaths. Heads numerous, in a corymbose 

 thyrsus. — Some specimens from the Rocky Mountains are noticed by Hooker, 

 which, if they really belong to this species, approach the preceding perhaps 

 too closely. Mr. Nuitall's N. Hookeriana is said to be founded upon the N. 

 palmata of Hooker, as well as of Wilklenow, Pursh in part, and De CandoUe. 

 His N. speciosa is the N. palmata of Hooker from Oregon : the specimens 

 accord so well with the figure of Alton, and with the plant of the Northern 

 United States, &c. (which presents very considerable diversities in size and 

 foliage) that we see not how it is to be distinguished. Although the species of 

 this genus are by no means well settled, it is evident that little dependence 

 can be placed on the degree of division or toothing of the leaves. The sub- 

 masculine and subj'eminine plants are difFerent in appearance. 



20. TUSSILAGO. Tour?i. ; Gcertn.fr. t. 170; Less. syn. p. 159. 



Heads many-flowered, heterogamous. Flowers of the ray very narrowly 

 ligulate, in several series, pistillate ; those of the disk few, tubular (the limb 



