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FOC | Family List | FOC Vol. 20-21 | Asteraceae | Artemisia

7. Artemisia sect. Latilobus Y. R. Ling, Acta Phytotax. Sin. 18: 512. 1980.

牡蒿组 mu hao zu

Herbs, perennial, or subshrubs, puberulent or pubescent, often glabrescent, without glandular or viscid hairs (sessile glands often present). Leaves 1- or 2-pinnatisect to -pinnatipartite or 3-7-subpalmatisect or -partite; lobules linear, lanceolate, elliptic, linear-lanceolate, or serrate, 1.5-4(-12) mm wide. Capitula globose to ovoid. Phyllary margins scarious. Receptacle glabrous. Marginal florets 2-15(-21); corolla tubular or narrowly conical, often slightly enlarged at base, 2- or 3-toothed. Disk florets 2-20(-30), male; ovaries usually absent, rarely minute; style shorter than corolla, 2-cleft, lobes usually not divergent, with apex clavate or funnelform.

Twenty-three species: Asia, Europe; 17 species (seven endemic) in China.

Many species contain aromatic compounds and sesquiterpenoids and/or limited monoterpenoids.


1 Involucre 3-4 mm in diam.; marginal florets 10-15, disk florets 10-30   (2)
+ Involucre 1-2.5(-3.5) mm in diam.; marginal florets 2-9, disk florets 2-15   (5)
       
2 (1) Lower stem leaf petioles 5-7 cm; blades 10-15 cm; disk florets 25-30.   171 A. bargusinensis
+ Lower stem leaf petioles to 3 cm; blades 2-5 cm; disk florets 10-20   (3)
       
3 (2) Middle stem leaves spatulate or obovate-spatulate.   181 A. nanschanica
+ Middle stem leaves ovate, ovate-oblong, or elliptic   (4)
       
4 (3) Leaf blade pinnatisect; lower and middle leaves with petiole 1-3 cm; florets 21-30.   170 A. depauperata
+ Leaf blade ternately 3-partite (or -cleft); lower and middle leaves ± sessile; florets 33-40.   184 A. tridactyla
       
5 (1) Lower and middle stem leaf blades widest above middle, spatulate or subspatulate, often with attenuate base, serrate at apex, entire or 3-5-cleft with much broader middle lobe   (6)
+ Lower and middle stem leaves widest at or below middle   (11)
       
6 (5) Middle stem leaves 2-6 cm wide   (7)
+ Middle stem leaves 0.5-1.2(-2) cm wide   (9)
       
7 (6) Middle stem leaves 5.5-8 × 4-6 cm; involucre 2-3 mm in diam.   176 A. littoricola
+ Middle stem leaves 2.5-4 × 2-4 cm; involucre 1.5-2(-3) mm in diam   (8)
       
8 (7) Synflorescence a narrow, ± cylindric panicle.   177 A. manshurica
+ Synflorescence a broad, ± conical panicle.   174 A. eriopoda
       
9 (6) Basal leaves entire.   178 A. japonica
+ Basal leaves 1- or 2-pinnatipartite or -pinnatisect   (10)
       
10 (9) Middle stem leaves 2-3 cm, lobes 1-2 mm wide.   179 A. parviflora
+ Middle stem leaves 1-1.5, lobes 3-4 mm wide.   180 A. hancei
       
11 (5) Middle stem leaves 3-5(-7)-partite   (12)
+ Middle stem leaves 1- or 2-pinnatisect or pinnatipartite   (14)
       
12 (11) Branches 15-35 cm or more, usually flexuous and horizontal; middle stem leaves 3-7 cm wide.   183 A. dubia
+ Branches 8-14 cm, ascending; middle stem leaves 0.8-1.5 cm wide   (13)
       
13 (12) Middle stem leaves with lobes 10-20 mm; leaflike bracts 3-partite; corolla limb glabrous.   185 A. giraldii
+ Middle stem leaves with lobes 5-8(-10) mm; leaflike bracts linear or linear-lanceolate; corolla limb puberulent.   186 A. conaensis
       
14 (11) Rhizomes not shortly terete; middle stem leaves spatulate or attenuate, entire or obliquely 3-5-cleft, -partite, or -sect from apex to base, or leaves heteromorphic, spatulate or attenuate in sterile branches and 1(or 2)-pinnatisect or -partite.   175 A. angustissima
+ Rhizomes shortly terete; sterile and middle stem leaves not spatulate or attenuate, middle leaves 1- or 2-pinnatisect   (15)
       
15 (14) Stem, branches, leaves, and phyllaries densely gray and yellowish sericeous- pubescent, later sparsely pubescent; middle stem leaves with 2 or 3 pairs of lobes.   173 A. duthreuil-de-rhinsi
+ Stem, branches, and leaves pubescent or glabrescent; middle stem leaves with 2 or 3 pairs of lobes   (16)
       
16 (15) Middle stem leaves shortly petiolate, 1-pinnatipartite, or 2-pinnatipartite and then lobulate from mid-lateral lobes; capitula sparse.   172 A. desertorum
+ Middle stem leaves sessile, 1- or 2-pinnatisect, segments 2 or 3 pairs, basal lobes lobulate or not; capitula many, dense.   182 A. pengchuoensis

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