ParRT 3, 1916] CARDUACEAE: ANTHEMIDEAE 237 
1. Chrysanthemum coronarium [,. Sp. Pl. 890. 1753. 
Matricaria coronaria Desr. in Lam. Encyc. 3: 737. 1791. 
Pyrethrum breviradiatum Ledeb. Mém. Acad. St.-Pétersb. 5: 577. 1815. 
Pinardia coronaria Less. Syn. Comp. 255. 1832. 
Chrysanthemum segetum Forsk.; DC. Prodr. 6: 64, as synonym. 1837. Not C. segelum L. 1753. 
Glebionis coronaria Cass.; Spach, Hist. Vég. 10: 181. 1841. 
A leafy annual; stem 3-6 dm. high, glabrous, branched, grooved; leaves mostly twice 
pinnatifid, 3-6 cm. long, glabrous, the cauline sessile and auricled at the base, obovate in 
outline, the primary divisions oblanceolate, the secondary ones lance-linear in outline; heads 
solitary at the ends of the branches; peduncles 5-15 cm. long; involucre hemispheric, 8-10 
mm. high, 12-18 mm. broad; bracts yellow, with broad light-brown scarious margins, the 
outer ones ovate, the inner elliptic and much longer; ray-flowers 15—20; ligules 10-15 mm. 
long, 4-5 mm. wide; disk-corollas 5 mm. long; ray-achenes obpyramidal, as broad as long, 
3-angled, the middle angle winged; disk-achenes 4-angled, the inner angle produced into a 
short spur. 
TYPE LOCALITY: Crete. , 
DistrRiBuTion: Escaped from cultivation and on ballast in Ontario, Alabama, and the 
Bermudas; native of the Mediterranean region. 
ILLUSTRATIONS: Coste, Fl. Fr. f. 1931; Sibth. Fl. Graeca pl. 877; Reichenb. Ic. Fl. Germ. 
16: pl. 986, f. II, 5-13. 
2. Chrysanthemum segetum L. Sp. Pl. 889. 1753. 
Chrysanthemum laciniatum Gilib. Fl]. Lithuan. 218. 1782. 
Matricaria segetum Schrank, Baier. Fl. 2: 406. 1789. 
Pyrethrum segetum Moench, Meth. 597. 1794. 
Glebionis segetum Fourr. Ann. Soc. Linn. Lyon II. 17: 90. 1869. 
A leafy annual; stem glabrous, striate, 2-5 dm. high; lower leaves glabrous, spatulate 
or oblanceolate in outline, narrowed into winged petioles, pinnatifid into oblanceolate to cune- 
ate toothed divisions, the middle ones oblong, with toothed lobes, the uppermost lanceolate, 
dentate or entire; heads several, solitary at the ends of the branches; peduncles 1-5 cm. long; 
involucre nearly hemispheric, about 1 cm. high, 17-20 mm. broad; bracts yellow, with broad 
brown margins, elliptic or oval, rounded at the apex; ray-flowers 12-15; ligules 1-2 cm. long, 
4-7 mm. wide; disk-corollas yellow, 4 mm. long; ray-achenes as broad as long, with two lateral 
wings; disk-achenes cylindric, 10-ribbed. 
Tyrer Locauity: Skane, Sweden. 
DisTrRiBuTION: Adventive, especially on ballast, from Maine to Florida; California and Ore- 
gon; native of Europe, northern Africa, and the Orient. 
ILLUSTRATIONS: Coste, Fl. Fr. f. 1932; Fl. Dan. pl. 995; Curt. Fl. Lond. 6: pl. 60 [2: pl. 175]; 
Engl. Bot. pl. 540; Sv. Bot. pl. 496; Baxter, Brit. Bot. pl. 306; A. Dietr. Fl. Boruss. pl. 632; Reichenb. 
Ic. Fl. Germ. 16: pl. 986, f. I, 1-8; Fl. Deuts. ed. 5. pl. 3048; Britt. & Brown, Ill. FI. ed. 2. f. 4562. 
DOUBTFUL AND EXCLUDED SPECIES 
CHRYSANTHEMUM MEXICANUM H. B. K. Nov. Gen. & Sp. 4: 299. 1820. 
CHRYSANTHEMUM ANGUSTIFOLIUM Raf. Atl. Jour. 178. 1833. Both are insufficiently de- 
scribed and no plants answering the descriptions known to be found in Mexico and Texas, 
respectively. Both are described as having white ligules and hence to be excluded from the 
genus. 
10. BALSAMITA Desf. Act. Soc. Hist. Nat. Paris 1: 1. 1792. 
Aromatic perennial herbs. Leaves alternate, conspicuously punctate, broad, crenate, 
or lobed at the base. Heads many, corymbose, discoid or radiate. Involucre hemispheric; 
bracts 25-35, in 4-5 series, distinctly imbricate, the outer much shorter and wholly green. 
Receptacle convex. Ray-flowers in ours wanting, if present pistillate and fertile; ligules if 
present oblong, white. Disk-flowers many, hermaphrodite and fertile; corollas yellow, glandu- 
lar-granuliferous, nearly cylindric, the tube and throat scarcely differentiated; lobes 5, erect, 
ovate. Anthers with ovate obtuse tips. Style of the disk-flowers included; branches short, 
truncate and fimbriate at the tip. Achenes oblong-cylindric, 10-nerved; pappus a mere 
denticulate border. 
Type species, Tanacetum Balsamita L. 
