9. Tribe ANTHEMIDEAE

ANTHEMIDEAE
4a. Phyllaries scarious throughout, glabrescent, midvein not green ........................................... 5. A. sect. Albibractea (p. 717)
4b. Phyllaries scarious only at margin, midvein green or sometimes brown.
5a. Plants glandular or viscid pubescent .............................................................................. 4. A. sect. Viscidipubes (p. 711)
5b. Plants not glandular or viscid, puberulent or glabrescent.
6a. Capitula globose, rarely ovoid; lobules of leaf blade less than 1(–1.5) mm wide, if
wider then pectinate ................................................................................................... 2. A. sect. Abrotanum (p. 685)
6b. Capitula ellipsoid or oblong, rarely subglobose, campanulate, or hemispheric;
lobules of leaf blade more than (1.5–)2 mm wide ...................................................... 3. A. sect. Artemisia (p. 694)
1. Artemisia sect. Absinthium (Miller) Candolle in Candolle & Lamarck, Fl. Franç. 4: 189. 1805.
莳萝蒿组 shi luo hao zu
Absinthium Miller, Gard. Dict. Abr., ed. 4. 1754; Absynthium G. Gaertner, B. Meyer & Scherbius.
Shrubs, subshrubs, or annual, biennial, or perennial herbs, tomentose or puberulent, rarely arachnoid, without glandular or viscid
hairs (sessile glands often present). Leaves 1–3-pinnatisect; lobes or lobules linear or filiform, serrate. Capitula globose or subglobose.
Phyllary margin scarious. Receptacle pubescent or chaffy, hairs sometimes deciduous. Marginal florets (2–)4–30, sometimes
in 2 series and up to 70; corolla vasiform or narrowly conical, (2–)4-toothed. Disk florets (8–)20–120, bisexual; ovaries well
developed; style ca. as long as or longer than corolla, branches divergent, recurved at apex.
About 50 species: N Hemisphere, mostly in Asia and Europe, five species in North America, a few species in Africa and Central and South
America; 23 species (three endemic) in China.
Most species contain monoterpenoids.
1a. Annual or biennial herbs; main root solitary, vertical, tapered or ± fusiform; basal leaves (including petiole)
usually less than 8 cm.
2a. Synflorescence a simple erect terminal raceme; capitula 5–10(–15) mm in diam. ....................................... 1. A. macrocephala
2b. Synflorescence a panicle with spreading lateral branches; capitula 1.5–4(–6) mm in diam.
3a. Capitula 3–6 mm in diam.; marginal female florets 5–30, bisexual florets 30–120.
4a. Plants 50–150 cm tall; middle stem leaf blades 4–8(–13) × 3–6(–15) cm; female florets 20–30,
often in double series, bisexual florets 80–120 ..................................................................................... 2. A. sieversiana
4b. Plants 25–40 cm tall; middle stem leaf blades 1.5–2 × 1–1.5 cm; female florets 5–20 in
single series, bisexual florets 30–50 ............................................................................................... 22. A. succulentoides
3b. Capitula 1.5–3(–4) mm in diam.; marginal female florets 3–6, bisexual florets 18–28.
5a. Basal leaf blades 8–15 × 8–15 cm ............................................................................................................... 19. A. nakaii
5b. Basal leaf blades 3–4.5(–5) × 2–4 cm.
6a. Capitula 2–3(–4) mm in diam.; bisexual florets 18–28 ................................................................ 20. A. anethifolia
6b. Capitula 1.5–2(–2.5) mm in diam.; bisexual florets 8–16 ............................................................ 21. A. anethoides
1b. Perennial herbs, subshrubs, or shrubs; roots several, not fusiform (if biennials with single fusiform root
then basal leaves 11–18 cm); basal leaves usually more than 8 cm.
7a. Disk florets 8–20.
8a. Plants 15–25(–30) cm tall, densely gray or yellowish tomentose ...................................................... 16. A. younghusbandii
8b. Plants 25–80 cm tall, gray or yellowish arachnoid tomentose or silky pubescent, lower parts
sometimes glabrescent.
9a. Middle stem leaf blades 3–5 × 3–5 cm; marginal female florets 2–5 ........................................................ 18. A. fauriei
9b. Middle stem leaf blades 0.5–2 × 0.8–2.8 cm; marginal female florets 4–10.
10a. Ultimate leaf lobules narrowly spatulate, linear, or linear-oblanceolate, 1–3 × 0.5–1.5 mm ..... 9. A. xerophytica
10b. Ultimate leaf lobules elliptic-oblanceolate or elliptic-lanceolate, 6–12 × 1–1.5 mm ..................... 10. A. rutifolia
7b. Disk florets 20–80.
11a. Leaf blade entire or with apex crenately 3–5-lobed .............................................................................. 12. A. lagocephala
11b. Leaf blade 1–3-pinnatisect.
12a. Capitula 2–4(–5) mm in diam.
13a. Basal to middle stem leaves with petiole 2–12 cm; plants 60–150 cm tall ............................ 5. A. absinthium
13b. Basal to middle stem leaves sessile or with petiole to 2 cm; plants 20–70 cm tall.
14a. Middle stem leaves sessile, gland-dotted ...................................................................... 11. A. obtusiloba
14b. Middle stem leaves with petiole 5–20 mm, not gland-dotted.
15a. Bisexual florets 20–30; perennial herbs or occasionally subshrubs with
slender rootstock; plants densely yellowish or pale yellow sericeous ........................ 6. A. frigida
15b. Bisexual florets 35–50; subshrubs with a thick woody rhizome ca. 1 cm or
more in diam.; plants arachnoid puberulent, glabrescent ......................................... 23. A. persica
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