258 NORTH AMERICAN FLORA [VoLUME 34 
exserted, in the disk-flowers included to barely exserted; branches in the ray-flowers elongate- 
filiform, spreading; in the disk-flowers recurved and truncate at the apex, with an erose or 
penicillate apex. Receptacle woolly. 
Ill. Frigidae. Canescent plants, more or less woody at the base. Heads numerous, 
paniculate. Corollas glandular-granuliferous. 
23. Artemisia Absinthium I. Sp. Pl. 848. 1753. 
Absinthium vulgare Lam. Fl. Fr. 2: 45. 1778. 
Artemisia absinthia St.-Lag. Ann. Soc. Bot. Lyon 7: 119. 1880. 
A frutescent perennial; stem 6-10 dm. high, finely cinereous-puberulent, branched; lower 
leaves petioled, 5-15 cm. long; blades rounded-ovate in outline, twice or thrice pinnately 
divided into linear-oblanceolate divisions, canescent on both sides but often less so on the 
upper side; upper leaves less divided, with indistinct petioles or those of the inflorescence 
merely cleft or entire and sessile; heads numerous in a leafy panicle, heterogamous, nodding; 
peduncles 1-3 mm. long; involucre hemispheric, 3-3.5 mm. high, about 5 mm. broad; bracts 
12-15, in 3 series, canescent, the outermost lanceolate, not scarious-margined; inner bracts 
ovate, with yellow scarious margins; ray-flowers about 10; corollas 1.5 mm. long; disk-flowers 
about 15; corollas deeply campanulate, 2 mm. long; achenes 1.3 mm. long. 
TYPE LOCALITY: Europe. 
DISTRIBUTION: Newfoundland to British Columbia, Utah, and North Carolina; escaped from 
cultivation; native of Europe. 
InLusrrations: Sv. Bot. pl. 106; Engl. Bot. pl. 1230; Fl. Dan. pl. 1654; Hayne, Arzn. Gew. 
2: pl. 11; A. Dietr. Fl. Boruss. pl. 633; Fl. Deuts. ed. 5. pl. 3001; Reichenb. Ic. Fl. Germ. 16: #l. 
1029, f. I, 1-3; Britt. & Brown, Ill. Fl. f. 4005; ed. 2. f. 4578. 
24. Artemisia frigida Willd. Sp. Pl. 3: 1838. 1804. 
Artemisia procumbens Schrad.; DC. Hort. Monsp. 80. 1813. 
Artemisia sericea Nutt. Gen. 2: 143. 1818. Not A. sericea Weber. 1775. 
Artemisia pumila Link, Enum. 2: 316, as synonym. 1822. 
Artemisia virgata Richards. in Frankl. Journey App. 747. 1823. 
Artemisia jeniseensis Willd.; Spreng. Syst. 3: 489. 1826. 
Absinthium frigidum Besser, Bull. Soc. Nat. Mose. 1: 251. 1829. 
A perennial herb, with a cespitose woody caudex, or suffruticose with decumbent or ascend- 
ing stems, 2-4 dm. high; annual branches erect, rather simple, silky- or villous-canescent; leaves 
1-3 cm. long, silvery-canescent, twice ternately or quinately dissected into linear or linear- 
oblanceolate divisions, the basal ones crowded, the cauline ones often with fascicles of smaller 
ones in their axils; heads nodding, subsessile or short-peduncled, heterogamous, in narrow 
leafy panicles, with erect racemiform branches, or sometimes in simple racemes; involucre 
hemispheric, 3-4 mm. high, 5-6 mm. or in the racemose form even 7 mm. broad; bracts white- 
villous, about 20, in 3 series, sub-equal in length, those of the outermost series linear and 
herbaceous, the rest lanceolate, acute, with yellow or brown scarious margins; ray-flowers 
12-15; corollas 1.5 mm. long; disk-flowers 30-50; corollas narrowly funnelform, 2-2.5 mm. 
long; achenes about 1 mm. long, striate. 
TYPE LOCALITY: Davuria [Eastern Siberia]. 
DISTRIBUTION: Minnesota and Manitoba to Alaska, British Columbia, Arizona, and Texas; 
introduced in the east from Nova Scotia to Ontario and New Jersey; also native of Siberia. 
I_LustRaTIONs: Ledeb. Ic. Fl. Ross. pl. 462; Britt. & Brown, Ill. Fl. f. 4004; ed. 2. f. 4577. 
IV. Lanatae. Low sericeous herbs with rootstocks. Heads few in interrupted racemes 
or spikes, or solitary. Disk-corollas funnelform. 
25. Artemisia scopulorum A. Gray, Proc. Acad. Phila. 1863: 66. 
1863. 
A perennial herb, with a simple or branched rootstock; stem 1-3 dm. high, simple, some- 
what silky-canescent; basal leaves petioled, 3-7 cm. long, silky-canescent, twice pinnatifid 
into linear divisions; lower stem-leaves similar but smaller, the upper less divided, and those 
