Cacalia. COMPOSITE. 395 



with aspect mostly unlike Senecio. Leaves petioled. Our species all smooth, 

 glabrous, and akenes glabrous: fl. summer. --L. Gen. ed. 4, 362 (partly); DC. 

 Prodr. vi. 327 (with Psacah'um, & excl. 0, 4) ; Gray, Proc. Am. Acad. xix. 51. 



1. Involucre in ours of rather many bracts, calyculate with some small loose 

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



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

 corymbiform cyme of numerous heads : leaves hastate and on margined or winged petioles, 

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

 bracts of the involucre about 12 : flowers 25 to 30: corolla-lobes fully half the length of the 

 throat: style-branches capitellate-truncatc. Spec. ii. 835; Walt. Car. 195; Michx. Fl. ii. 

 90; Schkuhr, Ilandb. t. 230; Torr. & Gray, Fl. ii. 434. Senecio suaveolens, Ell. Sk. ii. 328. 



Moist and shaded ground, W. New England to Michigan and Illinois, and along the 

 mouiitaiu region to W. Florida. 



C. IIASTATA, L., which reaches Kamtschatka, is said to have been collected in Sitka by four 

 collectors (see Herder in PL Radd. iii. 10SJ ; but Stewart's plant, named by Herder, is Pre- 

 nanthes aluta, 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 fimbrilltc in 

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

 cymes. Conophora, DC. 



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



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

 slightly angulate-lobed, repand-deutate, ample; radical dilated-reniform, often 2 feet wide; 

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



Muhl. in Willd. Spec. iii. 1735 (where the heads are wrongly said to be many-flow- 

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

 Carolina and Tennessee along the mountains. 



C. atriplicifolia, 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 inches broad) ; cauline angulate-cordate or triangular, or with cuneate base 

 and 3 to 7 laciniate lobes, to rhombic-lanceolate and entire in the uppermost : cymes open : 

 corolla-lobes fully twice the length of the throat. Spec. ii. 835 ; Walt. 1. c. ; Michx. 1. c. ; 

 Pursh, 1. c. ; Schkuhr, Haudb. t. 236; Torr. Fl. N. Y. i. 401, t. 59. C. atriplici/'olin, etc., 

 Moris. Hist. iii. sect. 7, t. 15, f. 7. C. gic/antea, Nees & Schauer, Ind. Sem. Vratisl. 1841, & 

 Linusea, xvi. 216. Senecio atriplicifolius, Hook. Fl. i. 332, with var. reniformis. Moist or 

 dry ground, W. Canada and New York to Florida, west to Michigan and Illinois. 



C. diversif 61ia, TORE. & GRAY. Not 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. ii. 435. River swamps in Middle Florida, Chapman. 

 S. Carolina, Rarenel. 



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

 smooth: style-tips with or without a short setiform central cusp. 



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



C. Floridana, GRAY. Not 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, obtusely dentate (cauline 2 or 3, and radical 5 or 6 inches long) : 

 cymes open, irregular. Proc. Am. Acad. xix. 52. Coast of Florida, Palmer, Chapman. 



i -l 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 broadly 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. Ell. Sk. ii. 310; Torr. & Gray, 



