Cacalla. COMPOSITiE. 395 



with aspect mostly unlike Seiieci'o. LeavHS petioled. Our spocies all smooth, 

 glabrous, and akenos irlabrous : fl. summer. — L. ( ren. ed. 4, olJ2 (partly); DC. 

 Prodr. vi. o'Jl (with Psacalium, & excl. § 3, 4) ; Gray, Proo. Am. Acad. xix. 51. 



§ 1. Involucre in our- of rather many bracts, calyculate with some small loose 

 ones, and man3'-flowered : corolla-lobes shorter than the throat : receptacle plane. 



C. SUaveolens, L- Xearly glabrous : stem striate-angled, 3 to 5 feet high, leafy up to tlie 

 corymbiiorm cyme of numerous heads : leaves hastate and on margined or winged jietioles, 

 or uppermost merely truncate or cuneate at base, acutely and often doubly dentate: proper 

 bracts of the involucre about \2 : flowers 23 to 30; corolla dobes fully lialf the length of the 

 throat: style-branches capiitellate-truncate. — Spec. ii. 83.'); Walt. Car. 195; ilichx. Fl. ii. 

 9G; Schkuhr, Handb. t. 23C ; Torr. & Giaj, IL ii. 434. Srnecio sunrfolms, Ell. Sk. ii. 328. 

 — Moir:t and shaded ground, W. Xew England to Jlichigan and Illinois, and along the 

 mountain region to W. Elorida. 

 C. insT.ixA, L., wliicli reaches Kamtschatka, is said to have been collected in Sitka by four 



collectors (?ee Herder in PI. Kadd. iii. 103); but btewart's plant, named by Herder, is Pre- 



nanthes alata, and probably the others likewise. 



§ 2. Involucre of about 5 narrowly oblong or linear bracts and as many flow- 

 ers : receptacle commonly with a fleshy projection or 2 or 3 thickish fimbrillse in 

 the centre : corolla-lobes longer than the throat : heads numerous in corymbose 

 cymes. — § Cunoj^/iora, DC. 



* Leaves merely lobed, pedately ribbed, veiny: plants glabrous and smooth. 

 C. reniforniis Mihl. Green, not at all glaucous: stem angled, 4 to 9 feet high: leaves 

 slii'hth angulate-loVjed, repand-dentate, ample; radicji] dilated-reniforra, often 2 feet wide ; 

 upper cauline subcordate or flabelliform : corolla parted down almost to the proper tube. 

 iluhl. in WiUd. Spec. iii. 1735 (where the heads are wronL'ly said to be many-flow- 

 ered); Pursh, Fl. ii. 518; Torr. & Gray, Fl. ii. 435. — Rich and damp woods, Penn. to 

 Carolina and Tennessee along the mountains. 

 *'C. atriplicif olia, L. Glaucous : stem terete, 3 to 6 feet high, naked at summit ; leaves of 

 firmer texture, lobed or incised, but not dentate ; radical from round-reniform to subcordate- 

 ovate (larger 6 inches broad) ; cauline angnlate-curilate or triangular, or with cuneate base 

 and 3 to 7 laciniate lobes, to rhombicdanceolate and entire in the uppermost : cymes open : 

 corolla-lobes fully twice the length of the throat. — Spec. ii. 8.35 ; Walt. I.e.; Miclix. I.e.; 

 Pursh, 1. c. ; Sclikuhr, Handb. t. 236; Torr. Fl. X. Y. i. 401, t. 50. C. atriplicif Ala, etc., 

 Jloris. Hist. iii. sect. 7, t. 15, f. 7. C. gigantm, Xees & Srhauer, Ind. Sern. Vratisl. 1841, & 

 LinuEea, xvi. 216. Smtciu atriplicifolius, Hook. Fl. i. 332, with var. rr-niformls. — iloist or 

 dry ground, W. Canada and Xew York to Florida, west to Michigan and Illiu.jis. 

 C diversif olia Toer. & Ge-\y. Xut glaucous : stem striate, 2 or 3 feet high : corolla- 

 lobes a little longer than the oblong-campanulate throat : otherwise nearly as in the preced- 

 ing! into which it may pass. — Fl. iL 435. — Kiver swamps in Middle Florida, Chapman. 

 S. Carolina, Po'ventl. 



* * Leaves from sinuately dentate to entire, 3-7-nerved or triplinerved : plants gkbrous and 

 smooth: style-tips with o"r without a short setiform central cusp. 



-1- Corolla-lobes moderately longer than the oblong-campanulate throat. 

 C Floridana, Gkay. Xot glaucous ; stem 3 or 4 feet high, rigid, striate-angled : leaves 

 thickish ovate or oblong, obtuse, cuneate-contracted at base into a margined petiole, 3-5- 

 nerved from or near the base, obtuselv dentate (cauline 2 or 3, and radical 5 or 6 inches long) : 

 cymes open, irregular. - Proc. Am. Acad. xix. 52.-Coast of Florida, Palmer, rh<,,„„.:n. 

 4_ ^_ Corolla parted down almost to the proper tube : stems comparatively naked above, bearing 

 loose fastigiate-corymbose cymes. 

 C OVata Ell- Somewhat glaucous: stem terete ; 3 or 4 feet high: leaves thinnish, from 

 'oval or radical broadlv ovate, to oblong or upper cauline oblong-lanceolate, obtuse or acute, 

 entire or with a few irregular teeth ; uppermost sessile ; lower and radical nervose at base 

 and triplinerved above it, the nerves commonly diverging. — EU. Sk. ii. 310; Torr. & Gray, 



