194 COMPOSITE. 



Rich wood3 and banks of streams. Sept. Stem 3 to 4 feet high, grooved and an- 

 gled, leafy. Leaves smooth and green on both Fides. Root-haves on long petiolea, 

 pointed. Stem-leave* on winged petioles. Flowers whitish, in a terminal compound 

 eary nib. 



4. C. COCCIXEA, Curt Scarlet Cacalia. Tassel Flower. 



Radical leaves ovate-spatulate ; stem-leaves clasping, crenate; involucre ovate- 

 •ylindric ; scales linear, at length reflexed; achenia ciliate; pappus in several rowl 

 A hands )mo border flower from the East Indies. Stem 1 foot high. Flowers brighl 

 aaaxlet. Juno — Sept. Annual. 



50. SENECIO, Linn. Groundsel. 



Lat. senejr, an eld man ; the pappus resembling a white beard. 



Heads many-flowered, discoid, with the flowers all perfect 

 and tubular, or mostly radiate, the rays pistillate. Invol- 

 ucre scales in a single row, or with a few bracelets at tht 

 base. Receptacle flat. Pappls of numerous very soft 

 and slender capillary bristles. — A vast genus embracing about 

 600 species of herbs and shrubs, with alternate leaves and mostly 

 yellow flowers exceeding the involucre in solitary or corymbed heads, 

 *Fays none; annual. 



1. S. vulgaris, L. Common Groundsel. 



Nearly smooth, or at first woolly; stem erect, often branching; leaves pinnatiM 

 «nd toothed, clasping, the lowest petioled; heads in a corymb, nodding; pappus 

 •qualling^he corolla. 



Waste place?; common, naturalized. May — Oct. A common weed, growing 

 about houses. rubbi>h, &c, 6 to IS inches high, leafy, branching, mostly smooth. 

 Leaves thin, bright green. Heads terminal, without rays, yellow. 



• * Rays present ; heads corymlcd ; perennial. 



2. S. aureus, L. Golden Senicio. Squaic-weed. 



8moothor downy-woolly when young; rcoi-leaves simple and rounded, the larger 

 mostly cordate, exoaaia-toothed, long-petioled; the lower stem-leaves lyre-shaped, 

 upper lanceolate, cut pinnat':fid, sessile or partly clasping ; corymb umlel-like. 



A very variable plant, embracing several nominal varieth s. of which the follow- 

 ing are the most common : \ar.l, olovatvs, with the root-leaves round t borate, 

 generally found in dry places. Var. 2, Balsam He. with the root-leaves oblong, 

 ■patulate or lanceolate, sometimes cut toothed, t; 1 poring into the petiole. Rocky 

 places; common everywhere. May, June. Stem 1 to 2 feet high, branched above, 

 •ften woolly. Heads middle-sized, numerous, on long peduncles which are thick- 

 ened near the involucre. Fays 8 to 12, and with the di>k yellow. 



3. S. TOMENTOSUS, Michx. Doicng Groundsel. 

 Whitc-tomentose and woolly; radical leaves oval-oblong, obtuse ere rate-toothed, 



•c slender petioles; stem leaves oblong, somewhat divided; corymb flat-topped. 



Dry rocks on the Blue Mountains. Pursh. May, June. Stem 1 to 8 feet high, 

 nearly leafless above. Heads yellow, larger than in S. aureus; rays 12 to 15, eloa- 

 gated. 



4. S. elongatus, Pursh. Elongated Groundsel. 



Smooth ; radical leaves spatulate, serrate, attenuated into a petiole ; stem learn* 

 ftanatifid, toothed, very remote; httd* on elongated pcdunolw, arranged in a 

 ABtewhat omUled coryab. 



