376 COMPOSITE. Petasites. 



radical leaves on strong petioles, cottony-tomentose or glabrate ; the flowers 

 whitish or purplish, in spring. — Gasrtn. Fruct. ii. 406, t. 1G6; Grenier & Godr. 

 Fl. Fr. ii. 89; Reidienb. Ic. Y\. Germ. t. 89G-901 ; Benth. & Hook. Gen. ii. 

 438. Nardosmia (Cass.) & Petasites, DC. Prodr. v. 20"), 20G. 



§ 1. No ligule to female flowers: an introduced plant. — Petasites, DC. 



P. VULGARIS, Desf. Rootstock very stout: leaves at maturity very large, round-cordate, an- 

 gulate-dentate and denticulate : lieads racemosely disposed : flowers purplish. — Tussilacjo 

 I^etasiies, L. — In cult, and waste grounds, spreading in the vicinity of Philadelphia, C. E. 

 Smith. (Nat. from Eu.) 



§ 2. Female flowers with distinct ligules : rootstocks in ours slender and creep- 

 ing : leaves developing with or soon following the whitish blossoms, in spring. — 

 Nardosmia, Cass. ; so named from the fragrant flowers of the original species. 



P. sagittata, Gray. Leaves from deltoid-oblong- to rcniform-hastate, from acute to 

 rounded-obtuse, repatid-dentate, very white-tomento.se beneath, when full grown 7 to 10 

 inches long : heads short-racemose becoming corymbose : ligules equalling or shorter than 

 the disk. — Bot. Calif, i. 407. Tussilaijo sagittata, Pursh, Fl. ii. 332. Nardosviia sagittata, 

 Hook. Fl. i 307, and apparently a part of iV. frigida, Hook. — Wet ground, Hudson's Bay 

 to Fort Franklin, west to the Rocky Mountains in Brit. Columbia, and .south to those of 

 Colorado. 



P. frigida, Friks. Leaves small (1 to 3 or 4 inches long), rounded- or oblong-cordate to 

 renil'orm-hastate, sometimes even truncate at base, angulately or more deeply and sinuately 

 lobed, the lobes entire: beads few, corymbose. — " Syll. 20," & Sum. Veg. b'cand. 182. 

 Tussilago frigida, L. ; Fl. Dan. t. 61, not of Pursh, whose plant from Canada and Kew 

 England is either fictitious or the succeeding species. T. corijmbosa, R. Br. in Parry Voy. 

 & Richards. App. Frankl. Journ. ]\a}-dosmia angulosa, Cass. Diet, xxxiv 188. ^V. frigida 

 & N. cort/mhosa, Hook. 1. c, at least mainly. — Arctic coast and west to Kotzebue Sound, the 

 Aleutian Lslands, &c. (N. Eu. & Asia.) 



P. palmata, Gray. Leaves (7 to 10 or even 18 inches broad) round-reniform in outline, 

 palmately 7-11 -cleft to beyond the middle or deeper; the lobes oblong-lanceolate to oblong- 

 cuneate, laciniate-dentate : scape muitibracteate, bearing rather numerous heads. — Bot. 

 Calif, i. 407. TussUngo palmata. Ait. Kew. ii. 188, t. 2; Pursh, 1. c. Nardosmia palmata. 

 Hook. I.e.; Torr. & Gray, I.e. — Wet woodlands, jSTewfoundland and Labrador, Canada, 

 New England, and Wisconsin to Brit. Columbia and California. (E. Asia.) 



181. GACALIOPSIS, Gray. (KaK-aAm, ancient Greek name of Colts- 

 foot ? and oi/fi-, likeness ; from resemblance, if not to the ancient Cacalia, at 

 least to tliat of Tournefort.) — Proc. Am. Acad. xix. 50. — Single known species. 



C. Nardosmia, Gray, 1. c. Robust perennial, a foot or two high, floccose-woolly, at length 

 glabrate; leaves considerably resembling those of Petasites palmata, alternate, long-petioled, 

 all but 2 or 3 radical, orbicular-cordate or fiabellate, 5-9-cleft or rarely parted ; the lobes or 

 divisions rather broad, iucisely lobed or dentate : heads (an inch high) few or several, pe- 

 dunculate, corymbosely or racemosely disposed at the naked summit of the .stem : corolla 

 pure yellow : flowers honey-scented. — Cacalia Nardosmia, Gray, Proc. Am. Acad. vii. 3G1. 

 Adenostijles Nardosmia, Gray, 1. c. viii. 631, & Bot Calif, i. 301, following Benth. & Hook. 

 — Open pine woods, California from Mendocino Co. northward (Bolander, Kellogg, Greene) 

 to Oregon and Washington Terr., Suksdorf, Howell. 



182. LtJlNA, Benth. (Anagram of Inula, which this genus approaches.) 

 — Hook. Ic. PI. t. 1139; Benth. & Hook. Gen. ii. 438. — Single species. 



L. hypoleuca, Benth. 1. c. Herbaceous and simple-stemmed from a .stout woody root- 

 stock, wliitc with appressed tomentum : stems hardly a foot high, equably leafy up to the 

 corymbiform cyme of several small heads : leaves ovate or oval, alternate, .sessile, entire, 

 inch or less long, nervose-vciny and reticulated, the upper face soon glabrate and green, 



