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dragon herb, dragon sagewort, dragon wormwood, tarragon, wild tarragon

Porter mugwort, Porter's wormwood

Habit Perennials or subshrubs, 50–120(–150) cm, strongly tarragon-scented or not aromatic; rhizomatous, caudices coarse. Perennials or subshrubs, (7–)8–14 cm (cespitose), faintly aromatic.
Stems

relatively numerous, erect, green to brown or reddish brown, somewhat woody, glabrous.

5–8, silver-gray, densely tomentose.

Leaves

proximal blades bright green and glabrous or gray-green and sparsely hairy, 5–8 cm;

cauline blades bright green (gray-green in desert forms), linear, lanceolate, or oblong, 1–7 × 0.1–0.5(–0.9) cm, mostly entire, sometimes irregularly lobed, acute, usually glabrous, sometimes glabrescent (deserts).

persistent, silver-green, mostly basal;

proximalmost blades 3–4 × 1–1.5 cm, 1-pinnately lobed, lobes mostly 2–3 mm wide;

blades of flowering stems somewhat reduced, (1–)2–3(–5) × 0.15 cm, mostly entire;

apices rounded, faces densely hairy.

Involucres

globose, 2–3 × 2–3.5(–6) mm.

broadly campanulate, 4–5(–7) × 2–3 mm.

Florets

pistillate 6–25; functionally staminate 8–20;

corollas pale yellow, 1.8–2 mm, eglandular or sparsely glandular.

pistillate 8–10 (2–2.8 mm); functionally staminate 22–32;

corollas pale yellow, 2.2–4.5 mm, glandular.

Phyllaries

(light brown, broadly lanceolate, membranous): margins broadly hyaline, glabrous.

(ovate, margins broadly scarious) densely tomentose.

Heads

in terminal or lateral, leafy, paniculiform arrays 15–45 × 6–30 cm; appearing ball-like on slender, sometimes nodding peduncles.

borne singly or (clustered in 2s and 3s on lateral branches; peduncles 0 or to 5 mm) in paniculiform arrays, (2–)4–9 × 1–1.5(–2) cm.

Cypselae

oblong, 0.5–0.8 mm, faintly nerved, glabrous.

(light brown) ellipsoid, flattened (faintly nerved), 1.5–2 mm, sparsely hairy, glabrous or resinous.

2n

= 18.

Artemisia dracunculus

Artemisia porteri

Phenology Flowering mid summer–late fall. Flowering mid–late summer.
Habitat Open meadows and fields, desert scrub, moist drainages, roadsides Barren clay and gravelly soils
Elevation 500–3000 m (1600–9800 ft) 1800–2000 m (5900–6600 ft)
Distribution
from FNA
AK; AZ; CA; CO; IA; ID; IL; KS; MN; MO; MT; ND; NE; NM; NV; OK; OR; SD; TX; UT; WA; WI; WY; AB; BC; MB; ON; SK; YT; Eurasia
[WildflowerSearch map]
[BONAP county map]
from FNA
MT; WY
[BONAP county map]
Discussion

Artemisia dracunculus is widely cultivated as a culinary herb and may be introduced in parts of its range. It is easily cultivated from rootstocks, and while establishment from seeds is rare, seedlings can be found with amenable environmental conditions. Because of its popularity as an herb, it may suffer from overcollecting. Its scarcity in Missouri, Iowa, and Illinois (J. T. Kartesz and C. A. Meacham 1999) may have been caused by overly enthusiastic collecting as well as habitat loss.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Although Cronquist observed that Artemisia porteri may be an autopolyploid derivative of A. pedatifida, morphologic similarities to northerly cespitose taxa suggest a more complex origin.

Artemisia porteri is in the Center for Plant Conservation’s National Collection of Endangered Plants.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 19, p. 508. FNA vol. 19, p. 509.
Parent taxa Asteraceae > tribe Anthemideae > Artemisia > subg. Drancunculus Asteraceae > tribe Anthemideae > Artemisia > subg. Drancunculus
Sibling taxa
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. borealis, A. californica, A. campestris, A. cana, A. carruthii, A. douglasiana, A. filifolia, A. franserioides, A. frigida, A. furcata, A. globularia, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. nova, A. packardiae, A. palmeri, A. papposa, A. pattersonii, A. pedatifida, A. pontica, A. porteri, A. pycnocephala, A. pygmaea, A. rigida, A. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. borealis, A. californica, A. campestris, A. cana, A. carruthii, A. douglasiana, A. dracunculus, A. filifolia, A. franserioides, A. frigida, A. furcata, A. globularia, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. nova, A. packardiae, A. palmeri, A. papposa, A. pattersonii, A. pedatifida, A. pontica, A. pycnocephala, A. pygmaea, A. rigida, A. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris
Synonyms A. aromatica, A. dracunculina, A. dracunculoides, A. dracunculoides subsp. dracunculina, A. glauca, A. glauca var. megacephala
Name authority Linnaeus: Sp. Pl. 2: 849. (1753) Cronquist: Madroño 11: 145. (1951)
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