73a. Leaves densely white-woolly beneath (flowers yellowish, late
summer) --74.

73b. Leaves smooth or hairy, never white-woolly --75.

74a. Heads 6-8 mm. wide (4-8 dm. high)
=Wormwood, Artemisia stelleriana.=

74b. Heads 3-4 mm. wide (5-10 dm. high)
=Wormwood, Artemisia ludoviciana.=

75a. Principal bracts of the involucre 5, with frequently a few much
smaller ones --76.

75b. Principal bracts of the involucre numerous --77.

76a. Heads few in small terminal clusters; foliage somewhat
viscid-pubescent (6-15 dm. high; flowers yellow, summer)
--114a.

76b. Heads very numerous in flat-topped clusters; foliage never
viscid-pubescent (1-2 m. high; flowers white, late summer)
--105c.

77a. Leaves broadly halberd-shape, 3-lobed (1-2 m. high; flowers white,
late summer) --105b.

77b. Leaves lobed only at the base (5-10 dm. high; flowers yellow,
summer) --93a.

77c. Leaves pinnatifid (2-8 dm. high; flowers yellow) --172.

78a. Bracts of the involucre dry and chaffy, at least at the tip;
plants always pubescent and usually white-woolly --79.

78b. Bracts of the involucre green or colored, but never dry and
chaffy --90.

79a. Pappus none; heads 3-4 mm. wide, in ample panicled spikes (flowers
yellowish, late summer) --74b.

79b. Pappus a minute ring or crown; leaves crenate (5-10 dm. high;
flowers yellow, summer) --93a.

79c. Pappus of hairs; heads in flat-topped clusters or slender spikes
--80.

80a. Heads sessile or subsessile in small flat-topped clusters;
flowering in spring or early summer; principal leaves basal
(1-4 dm. high; flowers white or purplish) (Everlasting) --81.

80b. Heads in terminal spikes (2-6 dm. high; flowers purplish,
summer) =Cudweed, Gnaphalium purpureum.=

80c. Heads in small or large flat-topped clusters, flowering in
summer or autumn; principal leaves on the stem --88.

81a. Stolons from the basal rosette of leaves leafy throughout and
ascending at the tip --82.

81b. Stolons prostrate throughout, leafy only at the tip --87.

82a. Basal leaves 2-5 cm. long, 1-nerved --83.

82b. Basal leaves 5-12 cm. long, 3-nerved --84.

83a. Basal leaves spatulate or oblanceolate, smooth above