bo 
bo 
or 
ParT 3, 1916] CARDUACEAE: ANTHEMIDEAE 
dense rounded corymbiform panicles; involucre campanulate, 4 mm. high, 2—2.5 mm. broad; 
bracts 15—18, villous, in 4 series, the outer ovate, acute, half as long as the innermost; inner 
bracts elliptic, obtuse; ray-flowers usually 5; ligules white, almost orbicular, 1.5 mm. long, 
roundly 3-lobed; disk-flowers about 12; corollas yellowish-white, 2.5 mm. long, sparingly 
glandular-granuliferous; tube about equaling the trumpet-shaped throat. 
TYPE LocALity: Near Pest, Hungary. 
DISTRIBUTION: Nantucket Island, Massachusetts, and Gaspé Peninsula, Quebec; adventive 
from Europe. 
ILLUSTRATION: Reichenb. Ic. Fl. Germ. 16: pl. 1028, II. 
18. Achillea angustissima Rydberg, sp. nov. 
A slender perennial, with a rootstock; stem striate, sparingly long-villous, simple; leaves 
narrowly linear in outline, bipinnatifid, 5-10 cm. long, 2-4 mm. wide; primary divisions short 
and crowded, ovate, the ultimate ones short, lanceolate, callous towards the spinulose-mucro- 
nate tips; heads many, in rather open flat-topped corymbs; involucre about 4.5 mm. high and 
3 mm. broad; bracts sparingly villous, 18—20, in 4 series, light-brown or straw-colored with 
margins of the same color, the outer lanceolate, the inner oblong, all acutish; ray-flowers 
usually 5; ligules white, broadly oval, about 4 mm. long, 2.5-3 mm. wide; disk-flowers 15—20; 
corollas yellowish-white, 2.5 mm. long; achenes fully 2 mm. long, narrowly margined. 
Type collected at Nasqually, Oregon, Wilkes Expedition 41 (Torrey Herbarium; herb. Colum- 
bia Univ.). 
19. Achillea asplenifolia Vent. Descr. Pl. Cels pl. 95. 1803. 
Achillea rosea Desf. Tabl. 105. 1804. 
Achillea Millefolium crustala Rochel, Pl. Banat. 71. 1828. 
Achillea crispa Lam.; DC. Prodr. 6: 26, assynoaym. 1837. 
? Achillea Millefolium rosea Rand & Redf. Fl. Mt. Desert 118., 1894. 
Achillea Millefolium asplenifolia Farwell, Asa Gray Bull. 3: 2f. 1895. 
A perennial, with a creeping cylindric rootstock; stem erect, 3-6 dm. high, sparingly silky- 
villous to nearly glabrous, simple or branched above; leaves glabrous and conspicuously punc- 
tate above, sparingly villous beneath, bi- or tri-pinnatifid, 4-15 cm. long, the lower petioled, 
oblanceolate, the upper sessile, linear, 1-1.5 cm. wide; primary divisions ovate in outline, ' 
spreading, the secondary ones lanceolate or ovate, entire or few-lobed, the segments or lobes 
with callous lanceolate tips; heads in rather open, round-topped, corymbiform panicles; in- 
volucre campanulate, 4-4.5 mm. high, 3-4.5 mm. broad; bracts in about 4 series, nearly 
glabrous, keeled, the outer ovate, half as long as the oblong acute inner ones; margins light- 
brown; ray-flowers about 5; ligules nearly orbicular, rose or purple, rarely white, about 2.5 
mm. long; disk-flowers 20 or more; corollas yellowish-white, 2.5 mm. long, nearly glabrous; 
achenes 2 mm. long, with thick margins. 
Type Locatity: Garden of J. M. Cels, Paris, from seed supposed to come from North America. 
DistripuTion: Nova Scotia to South Dakota and North Carolina; escaped from cultivation. 
ILLUSTRATIONS: Vent. Descr. Pl. Cels pl. 95; Rochel, Pl. Banat. f. 65; Fl. Dan. pl. 1937. 
20. Achillea Millefolium L. Sp. Pl. 899. 1753. 
Alitubus Millefolium Dulac, F1. Hautes-Pyr. 500. 1867. 
A perennial, with a creeping rootstock; stem 3-6 dm. high, simple or branched above, 
sparingly villous, striate; leaves sparingly villous, bi- or tri-pinnatifid, the lower oblanceolate 
in outline, 1-2 dm. long, 2-4 mm. wide, petioled, the upper sessile, linear, oblong, 1-2.5 cm. 
wide; primary divisions ovate in outline, divaricate; rachis winged, 1-2 mm. broad; ultimate 
divisions linear-lanceolate, spinulose-tipped; heads many, in corymbiform panicles; involucre 
4-5 mm. high, 3-5 mm. broad, villous; bracts about 20, in 4 series, the outer ovate, obtuse, 
about half as long as the innermost; inner bracts oblong, obtuse; margins light-brown, rarely 
dark-brown; ray-flowers mostly 5; ligules white or rarely pink or rose-colored, orbicular, 2.5—3 
mm. long; disk-flowers 20-25; corollas 2.5-3 mm. long, yellowish-white; achenes 2 mm. long, 
with thick wing-margins. 
Tyre LocaLity: Europe. 
Disrerution: Naturalized or native (?) from Nova Scotia and Quebec to New Jersey and 
Pennsylvania, occasionally found as far as Florida, Illinois, and Alberta; Yukon; Bermudas; native 
of Europe and Asia. 
