Artemisia ludoviciana, Louisiana wormwood



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Intermountain Flora


Intermountain Flora
Aromatic, rhizomatous perennial herb, mostly 3-10 dm tall, simple up to the inflorescence, more or less white-tomentose, at least above; leaves mostly 1.5-11 cm long, varying from lancelate or lance-elliptic or nearly linear and entire, to deeply lobed or cleft, the segments sometimes again toothed or irregularly cleft, the blade seldom more than 1 (1.5) cm wide exclusive of the lobes, more or less white-tomentose beneath, at least when young, often also above; inflorescence narrow and congested to loose and ample; involucre 2.5-5 mm high; receptable without hairs; flowers all potentially fertile, the 5-12 marginal ones pistillate, the 6-45 central ones perfect; achenes smooth and shining, obscurely or scarcely nerved, somewhat compressed, plumply oblong-oblanceolate, often slghtly oblique at the summit; 2n = 36, 54.

Cronquist, A., Holmgren, A.H., Holmgren, N.H., Reveal, J.L., and Holmgren, P.K. (1994) "Intermountain Flora" pg.151, vol. 5, The New York Botanical Garden New York.