Part 3, 1916] CARDUACEAE: ANTHEMIDEAE 239 
A stout perennial, with a rootstock; stem 4-10 dm. high, often reddish, simple, round- 
angled, more or less puberulent; leaves 1-3 dm. long, twice pinnately divided, glandular- 
punctate and more or less puberulent; primary divisions 2-5 cm. long, linear, acute or in var. 
crispum oblong and obtuse, more or less decurrent on the more or less winged and lobed rachis, 
the upper confluent; secondary divisions lanceolate or oblong-lanceolate, acute or in the variety 
obovate and obtuse, sharply serrate; heads many, in compound corymbs; involucre hemispheric, 
about 4 mm. high, 6-8 mm. broad; bracts 30-40, in 2-3 series, sparingly puberulent or glabrate, 
the outer lanceolate, acute, the inner oblong and obtuse; ray-flowers ina single series; corollas 
tubular, flattened, split on one side, 3-lobed, glabrous, 2 mm. long; disk-flowers 200-400; 
corollas 2 mm. long, glabrous; achenes 3—5-angled,] mm.long; pappusasmall 3—5-toothed crown. 
TYPE Locality: Europe. 
DISTRIBUTION: Introduced and naturalized, Nova Scotia to South Carolina, Mississippi, Cali- 
fornia, and Washington; Bermudas; native of Europe and Asia. 
ILLustRaTIONs: Fl. Dan. pl. 871; Sv. Bot. pl. 81; Engl. Bot. pl. 1229; Baxter, Brit. Bot. pl. 
24; Coste, Fl. Fr. f. 1903; Hayne, Arzn. Gew. 2: pl. 6; Reichenb. Ic. Fl. Germ. 16: pl. 996; A. Dietr. 
Fl. Boruss. pl. 666; Fl. Deuts. ed. 5. pl. 3014; Thomé, Fl. Deuts. pl. 586; Britt. & Brown, Ill. 
Fl. f. 3996; ed. 2. f. 4569. 
2. Tanacetum huronense Nutt. Gen. 2: 141. 1818. 
A stout perennial, with a branched rootstock; stem 3-6 dm. high, simple or branched 
above, more or less villous; leaves elliptic or oval in outline, 1-3 dm. long, twice or thrice 
interruptedly pinnatifid, more or less villous; primary divisions oblong in outline, acute, 2-6 
em. long, with smaller ones interposed on the narrowly winged rachis; secondary divisions 
elliptic, acute, toothed or often cleft into lanceolate lobes; heads few, 1-8, corymbose; 
involucre hemispheric or depressed, 5 mm. high, 10-15 mm. broad; bracts 20-30, in 2 series, 
lanceolate, acute, with brownish or purplish scarious tips; ray-flowers in a single series, pistil- 
late; corollas about 4 mm. long; ligules oval, 2-2.5 mm. long, with enrolled margins, slightly 
3-lobed; disk-flowers very numerous; corollas 3 mm. long; achenes 3 mm. long, somewhat 
angled; pappus a 3—5-lobed erose crown. 
Type Locatity: Shores of Lake Huron, near Michilimackinack. 
DISTRIBUTION: New Brunswick and Maine to es and Hudson Bay. 
ILLUSTRATIONS: Britt. & Brown, Ill. Fl. f. 3997; ed. 2. f. 4570. 
3. Tanacetum Douglasii DC. Prodr. 6: 128. 1837. 
Tanacetum huronense A. Gray, Syn. Fl. N. Am. 12: 366, in part. 1884. 
A stout perennial, with a branched rootstock; stem 3-5 dm. high, more or less villous; 
leaves 1-2 dm. long, obovate or oblong-oblanceolate in outline, twice or thrice interruptedly 
pinnatifid, villous; primary divisions oblong in outline, obtuse, 2-5 cm. long, the secondary 
ones obovate, toothed or cleft, the teeth or lobes oblong, obtuse; heads few, 3-10, corymbose; 
involucre depressed-hemispheric, 5 mm. high, 10-15 mm. broad; bracts 25-30, in 2 series, 
villous, the outer lanceolate, acute, the inner elliptic or ovate, mostly obtuse, with brown tips; 
ray-flowers few; corollas about 5 mm. long; ligules flabelliform, deeply 3-lobed, as long as the 
tube; style-branches short, oblong; disk-flowers very numerous; corollas 4 mm. long; achenes 
3 mm. long, obtusely angled; pappus a short crown. 
Tyre Locality: Western North America. 
DisTrRiBuTion: British Columbia to Oregon. 
4. Tanacetum bipinnatum (L.) Schultz-Bip. Tanac. 48. 1844. 
Chrysanthemum bipinnatum L,. Sp. Pl. 890. 1753. 
Matricaria bipinnata Desr. in Lam. Encyc. 3: 736. 1791. 
Pyrethrum bipinnatum Willd. Sp. Pl. 3: 160. 1804. 
ec Samat rT E um Richards. in Frankl. Journey ed. 2. App. 30. 1823. Not T. pauciflorum 
isc! 
Artemisia kotzebuensis Besser, Nouv. Mém. Soc. Nat. Mosc. 3: 80. 1834. 
Tanacetum kotzebuense Besser, Bull. Soc. Nat. Mose. 9: 107. 1836. 
Tanacetum boreale Nutt. Trans. Am. Phil. Soc. II. 7: 401. 1841. Not T. boreale Fisch. 1822, 
Pyrethrum velutinum Fisch.; Herder, Bull. Soc. Nat. Mosc. 38: 419. 1865. 
A stout perennial, with a creeping rootstock; stem 2-3 dm. high, striate, round-angled, 
more or less hirsute with flat crisp hairs; leaves 5-15 cm. long, oval or elliptic in outline, twice 
