Artemisia L.
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publication ID |
https://doi.org/10.5281/zenodo.293764 |
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persistent identifier |
https://treatment.plazi.org/id/90236A28-9DEA-F4EA-F777-FC9D10394618 |
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treatment provided by |
Plazi |
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scientific name |
Artemisia L. |
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88. Artemisia L. View in CoL 12
Herbs or small shrubs, frequently aromatic. Leaves alternate. Capitula small, usually pendent, in racemose, paniculate or capitate inflorescences, rarely solitary. Involucral bracts in few rows. Receptacle flat to hemispherical, without scales, sometimes hirsute. Florets all tubular. Achenes obovoid, subterete or compressed, smooth, finely striate or 2-ribbed; pappus absent or sometimes a small scarious ring.
Literature: T. G. Leonova, Nov. Syst. Pl. Vase. (Leningrad)!: 280-294 (1971). K. Persson, Op. Bot. (Lund) 35: 1-188 (1974).
Most leaves on the flowering stems undivided 2 Leaves glabrous, except for the lowest 49. dracunculus 2 Leaves ± hairy 3 Leaves thinly lanate, often glabrescent 10. caerulescens 3 Leaves densely stellate-tomentose 50. glauca Most leaves on the flowering stems divided Annual or biennial 5 Cauline leaves with rather dense, appressed hairs 5. siversiana 5 Cauline leaves glabrous 6 Cauline leaves with filiform lobes 57. scoparia 6 Cauline leaves with linear-lanceolate lobes 48. annua 4 Perennial 7 All florets hermaphrodite and fertile 8 Leaves rarely more than 10 mm, mostly in axillary fascicles on the flowering stems 9 Leaves c. 5 mm, usually 1-pinnatisect, all but the lowest sessile 45. herba-alba 9 Leaves c. 10 mm, 2-pinnatisect, all but the upper longpetiolate 44. barrelieri 8 Most leaves more than 10 mm, not in axillary fascicles on the flowering stems 10 Lower cauline leaves l(-2)-pinnatisect 11Panicle-branches l-2(-3)cm, erect to erecto-patent 18. lessingiana 11 At least some panicle-branches more than 3 cm, erectopatent, sometimes distally pendent (9-15). maritima group 10 Lower cauline leaves 2- to 4-pinnatisect 12 Panicle wide, with erecto-patent to patent branches (9-15). maritima group 12 Panicle narrow, with erect branches 13 Not or slightly caespitose; flowering stems not very slender; involucre usually more than 2-5 mm (9-15). maritima group 13 Caespitose, with numerous, very slender flowering stems; involucre 2-2-5 mm 14 Glabrescent; leaf-lobes linear to somewhat spathulate; involucre subglabrous to glabrous, shiny 16. pauciflora 14 Grey-tomentose; leaf-lobes linear to filiform; involucre grey- to white-tomentose with distinct glandular dots 17. gracilescens 7 Outer florets female, with filiform perianth 15 Inner florets functionally male 16 Outer involucral bracts hairy 17 Stems and leaves persistently sericeous; outer involucral bracts sparsely hairy 56. campestris 17 Stems and leaves glabrescent; outer involucral bracts densely hairy 51. trautvetterana 16 Outer involucral bracts glabrous
18 Involucre notmore than 3(-3-5)mm
19 Panicle narrow; branches erect 54. commutata
19 Panicle wide; branches erecto-patent
20 Outermost involucral bracts with wide scarious margins 56. campestris
20 Outermost involucral bracts almost entirely herbaceous 53. tschemieviana
18 Involucre at least 4 mm
21 Leaves almost all basal 55. bargusinensis
21 Leaves almost all cauline
22 Middle cauline leaves pinnatisect 56. campestris
22 Middle cauline leaves palmately 3-fid 52. salsoloides
15 Inner florets hermaphrodite and fertile
23 Receptacle hairy
24 Inflorescence paniculate; stems usually at least 30 cm
25 Leaf-lobes mostly 0-5 mm wide
26 Inner involucral bracts with wide glabrous margins 8. alba
26 Inner involucral bracts hairy all over 41. frigida
25 Leaf-lobes mostly at least 1 mm wide
27 Corolla-lobes hairy 42. sericea
27 Corolla-lobes glabrous
28 Involucre 2-3 mm; capitula c. 3 mm across 4. absinthium
28 Involucre 3-5-4 mm; capitula 6-7 mm across 6. arborescens
24 Inflorescence racemose or capitate, sometimes with a few short branches; stems usually less than 30 cm
29 Involucral bracts not hairy all over
30 Involucral bracts hairy, but with a glabrous scarious margin 8. alba
30 Involucral bracts nearly or quite glabrous
31 Involucral bracts strongly ciliate 47. rupestris
31 Involucral bracts glabrous 32. chamaemelifolia
29 Involucral bracts hairy all over
32 Corolla glabrous
33 Cauline leaves sessile or subsessile 41. frigida
33 Cauline leaves long-petiolate 38. glacialis
32 Corolla hairy at least in the upper part
34 Capitula erect, with c. 15 florets; corolla-lobes sparsely hairy 34. umbelliformis
34 Capitula nodding (at least when mature), with more than 20 florets; corolla-lobes densely hairy
35 Plant silvery-sericeous; involucral bracts with closely appressed hairs and dark margin; receptacle shortly hairy 35. nitida
35 Plant whitish villous-lanate; involucral bracts villous-lanate with pale margin; receptacle with long hairs 40. pedemontana
23 Receptacle glabrous
36 Leavesc. 5mm,mostlyinaxillary fasciclesonthe flowering stems 43. reptans
36 Leaves usually 10 mm or more, not in axillary fascicles on the flowering stems
37 Terminal lobe of cauline leaves at least 2 mm wide at the base
38 Capitula 10 or fewer 26. norvegica
38 Capitula numerous
39 Leaves not white-lanate beneath
40 Leaves appressed-pubescent beneath 20. armeniaca
40 Leaves glabrous or nearly so 21. latifolia
39 Leaves white-lanate beneath
41 Leaves white-lanate above 7. stellerana
41 Leaves green and glabrous to sparsely hairy above
42 Panicle usually sparingly branched; involucre
4-5 mm 3. tilesii 42 Panicle usuallymuch-branched; involucre 2-5-3 mm
43 Leaves withan obscure network of small veins; flowering July-September 1. vulgaris 43 Leaves with a conspicuous network of small veins; flowering October-November 2. verlotiorum
37 Terminal lobe of cauline leaves less than 2 mm wide at base
44 Capitula10or fewer 45 Capitulac. 10mm across, long-pedunculate; involucral bracts more than 5 mm 26. norvegica
45 Capitulaupto7 mm across,shortlypedunculate;
involucral bracts 3-4-5 mm
46 Corollaglabrous; involucralbractswitha conspicuous dark margin; capitula with 10-15
florets 37. genipi
46 Corollahairy, atleastintheupperpart; involucral bracts without a conspicuous brown margin;
capitula withat least 25 florets
47 Capitula usually more than 6, ina narrow raceme;
corolla yellow; hairs oncorolla-lobes flexuous,
the longest more than 0-5 mm; achenes hairy 36. eriantha
47 Capitula 1-4, in a corymb; corolla purplish; hairs on corolla-lobes thick, the longest less than
0-5 mm; achenes glabrous 39. granatensis
44 Capitula more than 10
48 Capitulaina simpleorvery slightlybranchedrace
mose inflorescence
49 Lowercaulineleaves2 -pinnatisect
50 Involucre c. 4 mm; capitula 6-8 mm across 25. atrata
50 Involucre c. 3 mm; capitula 3-5 mm across 19. laciniata
49 Lower cauline leaves simple, ±pinnatifid or digitate
51 Capitula with at least 25 florets; corolla villous
36. eriantha
51 Capitula with 10-15 florets; corolla usually glabrous 37. genipi
48 Capitula ina much-branched panicle; branches sometimes short but numerous
52 Lower caulineleaves sessile,thelowestpairof segments usually ± amplexicaul
53 Involucre glabrous 32. chamaemelifolia
53 Involucre pubescent
54 Leaves subglabrous above; lobes 0-5-1 -5 mm wide
55 Involucre c. 2-5 mm; corolla-lobes glabrous
29. santolinifolia
55 Involucre 3-5-4-5 mm; corolla-lobes arachnoidpubescent beneath 33. macrantha
54 Leaves densely pubescent on both surfaces; lobes up to 0-5 mm wide
56 Leaves matt; lobes up to 5 mm; corolla glabrous 30. pontica
56 Leaves sericeous; lobes 5-12 mm; corolla pubescent 31. austriaca
52 Lowercaulineleavesdistinctlypetiolate
57 Plant densely white-tomentose 46. hololeuca
57 Plant green or grey-green
58 Leaf-lobes filiform
59 Involucre 3-4 mm; inner bracts ovate 27. abrotanum
59 Involucre 2- 5 mm; inner bracts lanceolatespathulate 28. molinieri
58 Leaf-lobes linear to linear-lanceolate
60 Lower leaves with 1-2 small, ± amplexicaul lobes at base of petiole 8. alba
60 Lower leaves without lobes at base of petiole
61 Leaves usually with sparse, patent hairs beneath, often glabrescent; lamina usually more than 3 times as long as the longest segment
62 Inflorescence usually freely branched, with numerous capitula; involucral bracts usually with a pale margin 19. laciniata
62 Inflorescence with few or no short branches and few capitula; involucral bracts with a dark brown margin 25. atrata
61 Leaves usually appressed-pubescent beneath; lamina usually less than 3 times as long as the longest segment
63 Leaf-lobes making an angle of less than 45° with the segment 20. armeniaca 63 Leaf-lobes making an angle of more than 45° with the segment 64 Leaves not sericeous beneath 24. oelandica 64 Leaves sericeous beneath 65 Terminal lobes of leaves usually more than 1 *5 mm wide at base 22. pancicii 65 Terminal lobe of leaves usually c. 1 mm wide at base 23. insipida
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