Artemisia L., sp. Pl. 845, 1753.

 

1. Disc florets functionally staminate, sterile; style shorter than corolla, branches not divergent; glandular hairs on corolla oblong, not stalked.

2.Involucre subgloboseA. borealis

2. Involucre ovoid.

3. Root a taproot; ultimate segments of leaf blade filiformA. capillaris

3. Roots fibrous, fusiform; ultimate segments of leaf blade wider, not filiform.

4.Leaves of sterile stems serrate at apex, not cleft or parted.

5. Middle leaves of fertile stems usually serrate at apex, ultimate segments more than 2 mm wide when pinnately parted A. japonica

5. Middle leaves of fertile stems pinnately parted or divided, ultimate segments less than 1.1                                                  mm wide A. angustissima

4. Leaves of sterile stems subpalmately or 2-pinnately cleft, parted or divided.

6. Plants 10—25 cm tall; middle leaves of fertile stems 0.9—2.5 x 0.7-2 cm; involucre 1.4-1.6mm wide A. hallaisanensis

             6. Plants 0.3—1.2 m tall; middle leaves 3.2—6 x 2—5 cm; involucre 1.8-2.1 mm wide A. littoricola

1. Disc florets bisexual, fertile; style as long as or longer than corolla, branches divergent; glandular hairs on corolla cuneate and not stalked or capitate and long stalked.

7.     Underground parts consisting of short woody rhizome bearing fusiform fibrous roots; style branches of disc florets acute at apex; corolla with long stalked glandular hairs and uniseriate hairsA. keiskeana

7. Underground parts consisting of a taproot or long creeping rhizomes bearing thin fibrous roots; style branches of disc florets not acute at apex; corolla glabrous or with cuneate sessile glandular hairs and/or T-shaped hairs.

8. Middle leaves pinnately parted or divided; ultimate segments pectinate.

9. Annual or biennial herbs; underground part a taproot, rhizomes absent.

10. Involucre subglobose, 1.5-1.9 x 1.3-1.6 mm A. annua

10. Involucre hemispherical, 3.2—5 x 3.5—6 mm.

11. Middle leaves oblong, oblong-ovate or elliptic, both surfaces glabrate; phyllaries sparsely vil-Ious; receptacle glabrous; ovary glandular pubescent A. carvifolia

11. Middle leaves ovate or ovate-orbicular, adaxial surface sparsely villous, abaxial surface densely villous; phyllaries densely villous; receptacle densely pubescent with uniseriate hairs and glandular hairs; ovary glabrous A. sieversiana

9. Perennial herbs or subshrubs; underground parts consisting of long creeping rhizomes bearing thin fibrous roots.

12. Perennial herbs; lower leaves persistent at anthesis; ultimate segments of lower and middle leaves serrate to pectinate, apex acute A. tanacetifolia

12. Subshrubs; lower leaves withered before anthesis; ultimate segments of middle leaves pectinate, apex triangular A. sacrorum

12.1 Both surfaces of leaves sparsely villousvar. iwayomogi

12.1 Abaxial surface of leaves densely villous.

12.2 Adaxial surface of leaves sparsely villous and white glandularvar. sacrorum

12.2 Adaxial surface of leaves densely villous var. incana

8. Middle leaves entire, serrulate or coarsely serrate, or 2- or 3-cleft at apex; ultimate segments not pectinate.

13. Middle leaves entire, serrulate or coarsely serrate, or 2- or 3-cleft at apex.

14. Middle leaves 2- or 3-cleft at apex; involucre hemispherical; receptacle with uniseriate hairs and glandular hairs; corolla with T-shaped hairs and cuneate sessile glandular hairsA. lagocephala

14.Middle leaves entire, serrulate or coarsely serrate; involucre ellipsoid-campanulate;

receptacle with glandular hairs only, rarely also with few uniseriate simple hairs; corolla glabrous.

15. Abaxial surface of middle leaves sparsely villous, margins  serrulateA. viridissima

15. Abaxial surface of middle leaves densely arachnoid pubescent, margins entire or coarsely serrate.

16. Middle leaves linear or linear-lanceolate, margins entire A. subulata

16. Middle leaves elliptic or elliptic-lanceolate, margins with 1—3 coarse serrationsA. integrifolia

13. Middle leaves pinnately or palmately cleft, parted or divided.

17. Annual or biennial herbs; underground part a taproot; phyllaries sparsely villous, rarely  with glandular hairs only.

18. Leaves membranous; ultimate segments of middle leaves filiform, apex acute; heads  A. aurata

18. Leaves fleshy; ultimate segments of middle leaves linear, apex obtuse; heads not   grouped in paniculiform synflorescences; involucre obconical or ellipsoid-campanulate.

19. Involucre 4.2—5.5 x 3.8—4.5 mm; receptacle glabrous or with few uniseriate  hairsA. fukudo

                            19. Involucre 2.5—4.1 x 2—2.5 mm; receptacle with dense uniseriate    hair A. fauriei

17. Perennial herbs or subshrubs; underground parts consisting of long creeping rhizomes bearing thin fibrous roots; phyllaries densely villous or moderately to densely arachnoid pubescent.

20. Middle leaves palmately parted or divided; segments serrulate A. selengensis

20. Middle leaves pinnately cleft, parted or divided.

21. Stems densely villous; involucre subglobose, 6—9 mm wide A. stelleriana

21. Stems arachnoid pubescent or rarely glabrous; involucre ellipsoid-campanulate or narrowly ellipsoid-campanulate, less than 3.5 mm wide.

22. Adaxial surface of leaves without white glandular hairs.

23.Middle leaves I-pinnately cleft or parted.

24. Middle leaves obtuse at apex, adaxial surface densely white arachnoid  pubescentA. saitoana

24. Middle leaves acute at apex, adaxial surface pubescent when young, later glabrate.

25. Middle leaves 5—12 x 3—7 cm; petiole 0.8—2 cm long, wingedA. stolonifera

25. Middle leaves 4—7 x 2—4 cm; petiole absent    A. brachyphylla

23. Middle leaves (1-) or 2-pinnately parted or divided.

26. Middle leaves (1-) or 2-pinnately divided; heads erect; involucre  narrowly ellipsoid-campanulate A. rubripes

26. Middle leaves (1-) or 2-pinnately parted; heads nodding; involucre ellipsoidcampanulate.

27. Primary segments of middle leaves ovate-lanceolate, apex acute, margins serrate A. sylvatica

27. Primary segments of middle leaves oblanceolate, apex acuminate, margins usually pinnately parted or lobed, or coarsely serrate.

28. Plants 0.6—1.1 m tall; middle leaves 4.5—10 x cm; basal lobes  3 or 4 pairs; involucre 1-1.3 mm wide A. indica

                                                                   28. Plants 1.3—2.2 m tall; middle leaves 13—18 x 9-14 cm; basal lobes absent; involucre 2.2—2.6 mm wideA. montana

22. Adaxial surface of leaves with white glandular hairs.

29. Primary segments of middle leaves linear, apex obtuse; heads erect; involucre narrowly ellipsoid-campanulate, 0.9—1.2 mm wide A. lancea

29. Primary segments of middle leaves oblanceolate or ovate-lanceolate, apex acute or  acuminate; heads nodding; involucre ellipsoid-campanulate, more than 2 mm wide.

30. Middle leaves 2-pinnately parted nearly to midrib or divided;   primary segments pinnately parted or dividedA. codonocephala

                                                       30. Middle leaves 1- or 2-pinnately cleft or parted; primary segments coarsely serrateA. argyi

Artemisia L., sp. Pl. 845, 1753.

 

1. Disc florets functionally staminate, sterile; style shorter than corolla, branches not divergent; glandular hairs on corolla oblong, not stalked.

2.Involucre subgloboseA. borealis

2. Involucre ovoid.

3. Root a taproot; ultimate segments of leaf blade filiformA. capillaris

3. Roots fibrous, fusiform; ultimate segments of leaf blade wider, not filiform.

4.Leaves of sterile stems serrate at apex, not cleft or parted.

5. Middle leaves of fertile stems usually serrate at apex, ultimate segments more than 2 mm wide when pinnately parted A. japonica

5. Middle leaves of fertile stems pinnately parted or divided, ultimate segments less than 1.1                                                  mm wide A. angustissima

4. Leaves of sterile stems subpalmately or 2-pinnately cleft, parted or divided.

6. Plants 10—25 cm tall; middle leaves of fertile stems 0.9—2.5 x 0.7-2 cm; involucre 1.4-1.6mm wide A. hallaisanensis

             6. Plants 0.3—1.2 m tall; middle leaves 3.2—6 x 2—5 cm; involucre 1.8-2.1 mm wide A. littoricola

1. Disc florets bisexual, fertile; style as long as or longer than corolla, branches divergent; glandular hairs on corolla cuneate and not stalked or capitate and long stalked.

7.     Underground parts consisting of short woody rhizome bearing fusiform fibrous roots; style branches of disc florets acute at apex; corolla with long stalked glandular hairs and uniseriate hairsA. keiskeana

7. Underground parts consisting of a taproot or long creeping rhizomes bearing thin fibrous roots; style branches of disc florets not acute at apex; corolla glabrous or with cuneate sessile glandular hairs and/or T-shaped hairs.

8. Middle leaves pinnately parted or divided; ultimate segments pectinate.

9. Annual or biennial herbs; underground part a taproot, rhizomes absent.

10. Involucre subglobose, 1.5-1.9 x 1.3-1.6 mm A. annua

10. Involucre hemispherical, 3.2—5 x 3.5—6 mm.

11. Middle leaves oblong, oblong-ovate or elliptic, both surfaces glabrate; phyllaries sparsely vil-Ious; receptacle glabrous; ovary glandular pubescent A. carvifolia

11. Middle leaves ovate or ovate-orbicular, adaxial surface sparsely villous, abaxial surface densely villous; phyllaries densely villous; receptacle densely pubescent with uniseriate hairs and glandular hairs; ovary glabrous A. sieversiana

9. Perennial herbs or subshrubs; underground parts consisting of long creeping rhizomes bearing thin fibrous roots.

12. Perennial herbs; lower leaves persistent at anthesis; ultimate segments of lower and middle leaves serrate to pectinate, apex acute A. tanacetifolia

12. Subshrubs; lower leaves withered before anthesis; ultimate segments of middle leaves pectinate, apex triangular A. sacrorum

12.1 Both surfaces of leaves sparsely villousvar. iwayomogi

12.1 Abaxial surface of leaves densely villous.

12.2 Adaxial surface of leaves sparsely villous and white glandularvar. sacrorum

12.2 Adaxial surface of leaves densely villous var. incana

8. Middle leaves entire, serrulate or coarsely serrate, or 2- or 3-cleft at apex; ultimate segments not pectinate.

13. Middle leaves entire, serrulate or coarsely serrate, or 2- or 3-cleft at apex.

14. Middle leaves 2- or 3-cleft at apex; involucre hemispherical; receptacle with uniseriate hairs and glandular hairs; corolla with T-shaped hairs and cuneate sessile glandular hairsA. lagocephala

14.Middle leaves entire, serrulate or coarsely serrate; involucre ellipsoid-campanulate;

receptacle with glandular hairs only, rarely also with few uniseriate simple hairs; corolla glabrous.

15. Abaxial surface of middle leaves sparsely villous, margins  serrulateA. viridissima

15. Abaxial surface of middle leaves densely arachnoid pubescent, margins entire or coarsely serrate.

16. Middle leaves linear or linear-lanceolate, margins entire A. subulata

16. Middle leaves elliptic or elliptic-lanceolate, margins with 1—3 coarse serrationsA. integrifolia

13. Middle leaves pinnately or palmately cleft, parted or divided.

17. Annual or biennial herbs; underground part a taproot; phyllaries sparsely villous, rarely  with glandular hairs only.

18. Leaves membranous; ultimate segments of middle leaves filiform, apex acute; heads  A. aurata

18. Leaves fleshy; ultimate segments of middle leaves linear, apex obtuse; heads not   grouped in paniculiform synflorescences; involucre obconical or ellipsoid-campanulate.

19. Involucre 4.2—5.5 x 3.8—4.5 mm; receptacle glabrous or with few uniseriate  hairsA. fukudo

                            19. Involucre 2.5—4.1 x 2—2.5 mm; receptacle with dense uniseriate    hair A. fauriei

17. Perennial herbs or subshrubs; underground parts consisting of long creeping rhizomes bearing thin fibrous roots; phyllaries densely villous or moderately to densely arachnoid pubescent.

20. Middle leaves palmately parted or divided; segments serrulate A. selengensis

20. Middle leaves pinnately cleft, parted or divided.

21. Stems densely villous; involucre subglobose, 6—9 mm wide A. stelleriana

21. Stems arachnoid pubescent or rarely glabrous; involucre ellipsoid-campanulate or narrowly ellipsoid-campanulate, less than 3.5 mm wide.

22. Adaxial surface of leaves without white glandular hairs.

23.Middle leaves I-pinnately cleft or parted.

24. Middle leaves obtuse at apex, adaxial surface densely white arachnoid  pubescentA. saitoana

24. Middle leaves acute at apex, adaxial surface pubescent when young, later glabrate.

25. Middle leaves 5—12 x 3—7 cm; petiole 0.8—2 cm long, wingedA. stolonifera

25. Middle leaves 4—7 x 2—4 cm; petiole absent    A. brachyphylla

23. Middle leaves (1-) or 2-pinnately parted or divided.

26. Middle leaves (1-) or 2-pinnately divided; heads erect; involucre  narrowly ellipsoid-campanulate A. rubripes

26. Middle leaves (1-) or 2-pinnately parted; heads nodding; involucre ellipsoidcampanulate.

27. Primary segments of middle leaves ovate-lanceolate, apex acute, margins serrate A. sylvatica

27. Primary segments of middle leaves oblanceolate, apex acuminate, margins usually pinnately parted or lobed, or coarsely serrate.

28. Plants 0.6—1.1 m tall; middle leaves 4.5—10 x cm; basal lobes  3 or 4 pairs; involucre 1-1.3 mm wide A. indica

                                                                   28. Plants 1.3—2.2 m tall; middle leaves 13—18 x 9-14 cm; basal lobes absent; involucre 2.2—2.6 mm wideA. montana

22. Adaxial surface of leaves with white glandular hairs.

29. Primary segments of middle leaves linear, apex obtuse; heads erect; involucre narrowly ellipsoid-campanulate, 0.9—1.2 mm wide A. lancea

29. Primary segments of middle leaves oblanceolate or ovate-lanceolate, apex acute or  acuminate; heads nodding; involucre ellipsoid-campanulate, more than 2 mm wide.

30. Middle leaves 2-pinnately parted nearly to midrib or divided;   primary segments pinnately parted or dividedA. codonocephala

                                                       30. Middle leaves 1- or 2-pinnately cleft or parted; primary segments coarsely serrateA. argyi

Under Construction