Artemisia ludoviciana

Nuttall
Gen. N. Amer. Pl. 2: 143. 1818.
Common names: Silver wormwood white or silver sage
Illustrated
Synonyms: Artemisia vulgaris var. ludoviciana (Nuttall) Kuntze
Treatment appears in FNA Volume 19. Treatment on page 527. Mentioned on page 522, 524, 530, 532.

Perennials, 20–80 (rarely to 120 in desert washes) cm, aromatic (rhizomatous). Stems relatively few to relatively numerous, erect, gray-green, simple or widely branched, hairy. Leaves cauline, uniformly gray-green, green, or white, or bicolor (white and green); blades linear to broadly elliptic, 1.5–11 × 0.5–4 cm, entire or lobed to relatively deeply pinnatifid, faces hairy. Heads (erect to nodding, peduncles 0 or 2–5 mm) in congested to open (widely branched) arrays. Involucres campanulate or turbinate, (1–)2–4(–5) × 2–5(–8) mm. Phyllaries (gray-green), lanceolate to ovate or obovate (margins narrowly hyaline), densely tomentose. Florets: pistillate 5–12; bisexual 6–45; corollas yellow, sometimes red-tinged, 1.5–2.8 mm, glabrous. Cypselae ellipsoid ca. 0.5 mm, (obscurely nerved) glabrous. 2n = 18, 36, 54.

Distribution

V19-908-distribution-map.gif

Alta., B.C., Man., N.B., Ont., P.E.I., Que., Sask., Ala., Ariz., Ark., Calif., Colo., Conn., Del., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., Mont., N.C., N.Dak., N.H., N.J., N.Mex., N.Y., Nebr., Nev., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Va., Vt., Wash., Wis., Wyo., Mexico.

Discussion

Subspecies ca. 7 (6 in the flora).

Selected References

None.

Key

1 Leaves usually relatively deeply lobed (1/3+ widths, nearly to midrib, proximal leaves sometimes entire); involucres 3–8 mm diam.; mountain meadows and slopes > 2
1 Leaves entire or relatively shallowly lobed (lobes to 1/3 widths); involucres 2–3(–4) mm diam.; desert valleys and mountains > 3
2 Involucres 4–5 × 4–8 mm Artemisia ludoviciana subsp. candicans
2 Involucres 3–4 × 3–5 mm Artemisia ludoviciana subsp. incompta
3 Heads in paniculiform arrays (4–)8–30 cm diam.; leaves mostly 1.5–2 cm Artemisia ludoviciana subsp. albula
3 Heads in paniculiform or racemiform arrays 1–6 cm diam.; leaves 1.5–11 cm > 4
4 Leaf margins plane Artemisia ludoviciana subsp. ludoviciana
4 Leaf margins revolute > 5
5 Leaves bicolor (gray-green and bright green), margins mostly entire, abaxial faces glabrous Artemisia ludoviciana subsp. redolens
5 Leaves gray-green, margins usually lobed, abaxial faces hairy Artemisia ludoviciana subsp. mexicana
... more about "Artemisia ludoviciana"
Leila M. Shultz +
Nuttall +
Silver wormwood +  and white or silver sage +
Alta. +, B.C. +, Man. +, N.B. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ala. +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, N.C. +, N.Dak. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Nebr. +, Nev. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Va. +, Vt. +, Wash. +, Wis. +, Wyo. +  and Mexico. +
Gen. N. Amer. Pl. +
Illustrated +
Artemisia vulgaris var. ludoviciana +
Artemisia ludoviciana +
Artemisia subg. Artemisia +
species +