424 COMPOSITiE. Artemisia. 



31. A. Calijornica (Less.) : shrubby, pubescent-canescent ; leaves pin- 

 nately 5-7-divided, with very narrowly linear segments, which are rarely 

 2-3-cleft ; the uppermost entire ; heads in a simple or compound raceme, 

 secund, nodding, on short pedicels, hemispherical; scales of the involucre 

 elliptical, obtuse, with broad scarious margins, almost glabrous; corolla 

 glabrous. Less, in Linneea, 6. p. 523 (whence the above character is de- 

 rived) ; Hook. Sf Am. bot. Beechey, p. 150 ; Bess, in Linneea, 15. p. 93 8f 

 109. A. abrotanoides, Nutt. in trans. Amer. phil. soc. I. c. p. 399, ex char. 



California, Chamisso, Capt. Beechey. At St. Barbara, Nutlali; where it 

 is said to be common, to have much the appearance of A. Abrotanum, the 

 branches canescent, the heads large, and the receptacle somewhat hairy. — 

 De Candolle has omitted this species. Besser, who has recently examined 

 the original specimens [Linntsa, l. c), pronounces the plant a congener and 

 near ally of his A. Fischeriana, differing only in the division of the leaves. 

 He adds that the ovary is acutely 4-5-ribbed, one of the ribs winged, and 

 the rather large disk crowned with 4 or 5 short membranaceous squamellser. 



32. A. Fischeriana (Bess.) : shrubby, subcanescent ; lower leaves biter- 

 nately divided ; the upper 3-cleft ; segments filiform ; uppermost leaves en- 

 tire ; heads racemose, secund, nodding, hemispherical ; scales of the involu- 

 cre ovate-elliptical, with scarious margins ; corolla glabrous. Bess. Abrot., S^' 

 in DC. prodr. 6. p. 105. 



^3. vegetior (Bess. 1. c.) : leaves simply ternately divided ; scales of the in- 

 volucre all nearly glabrous. — A. foliosa, Nutt. ! in trans. Amer. phil. soc. I. c 

 p. 397. 



" St. Francisco, California. — Shrub 3 feet high, decumbent." Besser, I. c. 

 who, under var. /?., remarks that the receptacle bears a dense wool, longer than 

 the involucre ; and that the acutely ribbed achenia are terminated by a mem- 

 branaceous aad somewhat lobed pappus ; the epigynous disk therefore large, 

 as in Tanacetum. Mr. Nuttall's plant (not in flower) is from Monterey. 

 The leaves have smaller ones fascicled in the axils ; which is said by Les- 

 sing to be the case in A. Californica. 



§ 6. Receptacle villous or hairy : heads heterogamous ; the floioers all fertile : 

 achenia not ribbed: pappus none. — Absinthium, (Tourn., Gsertn.) Bess. 



33. A. Absinthium (Linn.) : suffruticose, erect, silky-canescent ; leaves 

 2-3 pinnately parted ; the lobes lanceolate, often incised, obtuse ; heads 

 hemispherical, racemose-paniculate, nodding ; exterior scales of the involu- 

 cre linear or lanceolate, silky; the inner broad, rounded, scarious. — Engl. 

 bot. t. 1230 ; Darlingt.fl. Cest. p. 491 ; DC. prodr. 6. p. 125 ; Oakes, cat. 

 pi. Vermont, in Thompson, gazetteer. Absinthium' vulgare, Lam.; Gcertn. 

 fr. t. 164. 



Road -sides, naturalized in the Northern States ! Also in Newfoundland, 

 DC. — Bitter and odorous. — Wormwood. 



34. A. frigida (Willd.): suffruticose, silky-canescent; cauline leaves 

 pinnately divided; the segments linear, 3-5-cleft ; heads small, racemose- 

 paniculate, globose, nodding, exterior scales of the involucre canescent ; the 

 inner woolly, oblong; corolla glabrous. DC. ! I. c. — Willd. spec. 3. p. 1838 ; 

 Ledeb. fl. Alt. 4. p. 63, 8fic. Alt. t. 462; Bess.! in Hook. Ji. Bor.-Am. 1. 

 p. 321. 



8. Gmelinana (Bess. ! 1. c.) : branched fromthe base ; lower pinnae of the 

 leaves simple and remote from the others, resembling stipules; segments 

 narrowly linear. — A. frigida, Pwrs/i.' ^. 2. p. 521. A. sericea, Nutt.! gen. 

 2. p. 143. A. virgata, Richards. ! appx. Frankl. journ. ed. 2. p. 30. Ab- 

 sinthium incanum, &c., Gmel, fl. Sibir. 2. p. 128, t. 62. 



Dry hills and rocks, Saskatchawan ! and Missouri ! to the Rocky Moun- 



