Part 3, 1916] CARDUACEAE: ANTHEMIDEAE 223 
villous, bipinnatifid; primary divisions ovate in outline, short, ascending, rather crowded, the 
ultimate ones lanceolate or ovate, strongly punctate, callous-thickened towards the spinulose- 
mucronate tips; heads numerous, in round-topped corymbiform panicles; involucre about 
5 mm. high and 4 mm. broad, villous, campanulate; bracts about 20, yellowish or straw- 
colored, with margins of the same color, the outer ones ovate, the inner elliptic or oblong, all 
obtuse or rounded at the apex; ray-flowers about 5; ligules suborbicular, round-lobed, 3—4 
mm. long; disk-flowers 20 or more; corollas yellowish-white, nearly 3 mm. long; achenes fully 
2 mm. long, thick-margined. 
Type collected at Grenada, Siskiyou County, California, June 19, 1905, A. A. Heller 8067 (herb. 
N. Y. Bot. Gard.). 
DistTRIBuTION: Washington and Idaho to southern California. 
11. Achillea gigantea Pollard, Bull. Torrey Club 26: 370. 1899. 
A robust perennial, with a rootstock; stem nearly 1 m. high, often much branched, sulcate, 
densely long-villous; stem-leaves 5-10 cm. long, bipinnatifid, linear-lanceolate in outline, 
densely long-villous; primary divisions short, crowded, the ultimate ones linear to ovate, usually 
obtuse, 1-2 mm. long; heads in dense many-branched corymbiform panicles, with densely 
pubescent branches; involucre 5-6 mm. high, about 4 mm. broad; bracts greenish-yellow 
throughout, the outer acutish, ovate, the inner oblong, rounded at the apex; ray-flowers about 5; 
ligules very small, 1-1.5 mm. long; disk-flowers about 30; corollas yellowish-white; achenes 
elliptic, obscurely margined. 
TYPE Locality: Tulare Lake, California. 
DistRrButIon: Type locality, in Owen’s Valley, and near Fort Tejon, California. 
12. Achillea puberula Rydberg, sp. nov. 
A stout perennial; stem about 5 dm. high, sulcate, puberulent; leaves linear or linear- 
oblanceolate in outline, 5-10 cm. long, less than 1 em. wide, bipinnatifid, puberulent, not villous, 
conspicuously punctate; rachis distinctly winged, about 1 mm. wide; primary divisions ovate, 
short, ascending, the ultimate ones oblanceolate or obovate, thickened towards the spinulose- 
mucronate tips; heads numerous, in compound corymbiform panicles; involucre about 4 mm. 
high and 3 mm. broad, nearly glabrous, minutely puberulent; bracts about 20, the outer 
lanceolate or lance-ovate, less than half as long as the innermost; inner bracts elliptic, obtuse; 
ray-flowers about 5; ligules white, suborbicular, 2 mm. long; disk-flowers about 20; corollas 
yellowish-white, 2.5 mm. long, densely glandular-granuliferous; achenes 2 mm. long, with 
thick margins. 
Type collected in Suisun Marsh, California, July 6, 1913, Alice Eastwood 3460 (herb. N. Y. 
Bot. Gard.). 
Distrisution: Central California. 
13. Achillea lanulosa Nutt. Jour. Acad. Phila. 7: 36. 1834. 
Achillea tomentosa Pursh, F1. Am. Sept. 563. 1814. Not A. tomentosa. 1753. 
Achillea Millefolium lanulosa Piper, Mazama 2: 97. 1901. 
Achillea lanulosa arachnoidea Lunell, Am. Midl. Nat. 1: 235. 1910. 
A perennial, with a creeping rootstock; stem 3-5 dm. high, more or less densely villous, 
simple, striate; leaves 5-10 cm. long, rarely more than 1 cm. wide, the lower oblanceolate in 
outline and petioled, the upper sessile and clasping, linear in outline; primary divisions lance- 
olate in outline, ascending, crowded, the ultimate ones linear, spinulose-mucronate; rachis 
scarcely margined; heads in flat-topped corymbiform panicles; involucre campanulate, 4~-4.5 
mm. high, 3-4 mm. broad, villous; bracts about 20, in 4 series, the outer lance-ovate, obtusish, 
the inner elliptic or oblong, obtuse; margins light-brown; ray-flowers commonly 5; ligules white, 
2.5-3.5 mm. long, nearly orbicular, round-lobed; disk-flowers about 20; corollas 2.5 mm. long, 
yellowish-white; achenes 2 mm. long, with thick margins. 
Tyrer Locauiry: Banks of the Kooskoosky [Clearwater River, Idaho]. ‘ 
Disrrmution: Minnesota and Saskatchewan to Kansas, Chihuahua, California, and British 
Columbia; occasionally introduced eastward to Ontario. 
ILLUSTRATION: Britt. & Brown, Ill. Fl. ed. 2. f. 4554. 
