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

5. Artemisia sect. Albibractea Y. R. Ling, Acta Phytotax. Sin. 18: 506. 1980.

白苞蒿组 bai bao hao zu

Herbs, perennial, without glandular or viscid hairs (sessile glands often present). Leaves 1 or 2(or 3)-pinnatisect, rarely irregularly shallowly lobed or 3-cleft at apex. Capitula with bracts absent or minute and basal. Phyllaries ± uniformly membranous, white or yellowish, glabrous. Receptacle glabrous. Marginal florets 6-12. Disk florets 3-10(-23), bisexual; ovaries well developed; style ca. as long as or longer than corolla, branches divergent, recurved at apex.

Six species: E, S, and SE Asia; five species (four endemic) in China.

Many species contain sesquiterpenoids and some monoterpenoids.


1 Leaf blade entire, rarely 2- or 3-cleft at apex, margin shallowly serrate.   134 A. anomala
+ Leaf blade pinnately divided, margin more deeply serrate or lacerate   (2)
       
2 (1) Middle stem leaves pinnatipartite or -cleft, segments 2(or 3) pairs, uppermost leaves 3-partite, margin serrate.   130 A. deversa
+ Middle stem leaves 1-3-pinnatipartite or pinnatisect, segments 3-5 pairs, uppermost leaves not 3-partite, margin irregularly serrate   (3)
       
3 (2) Middle stem leaves sessile, lobules lanceolate, elliptic-lanceolate, or linear-lanceolate, rarely falcate-lanceolate, entire or few serrate; involucre 2.5-3.5(-4) mm in diam., disk florets 10-23.   133 A. flaccida
+ Middle stem leaves petiolate, 1-3-pinnatipartite or -sect, segments irregularly serrate or lacerate; involucre 1-2.5(-3) mm in diam., disk florets 3-10   (4)
       
4 (3) Middle stem leaves 1 or 2(or 3)-pinnatipartite or pinnatisect, segments 3 or 4(or 5) pairs, margin lacerate; involucre 1.5-2.5(-3) mm in diam.; marginal female florets 4-10.   131 A. lactiflora
+ Middle stem leaves 2- or 3-pinnatatisect, segments 4 or 5 pairs, margin regularly serrate; involucre 1-1.5 mm in diam.; marginal female florets 2-4.   132 A. emeiensis

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