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Morphology and Histology of damanaka - Artemisia sieversiana Willd.

damanaka :

Flowering stems (green/yellow flowers) Photograph by: Mountain Partnership at FAO


Morphology:

Herbs, annual or biennial, 50-150 cm tall, gray pubescent or glabrescent. Basal and middle stem leaves: petiole (1-)2-4 cm; leaf blade broadly ovate or ovate-orbicular, 4-8(-13) × (2-)3-6(-15) cm, 2- or 3-pinnatisect or -partite, segments 2 or 3 pairs, lobules linear or linear-lanceolate, 2-10 × 1-1.5(-2) mm, rarely lacerate, apex acute or obtuse. Uppermost leaves and bracts sessile, pinnatisect or entire, leaves or lobes elliptic-lanceolate or lanceolate. 

Histology:

Synflorescence a long, narrow panicle to 10-30 × 5-10 cm; branches ± erect, 5-10 cm, remote. Capitula many, remote, pedunculate or ± sessile, subtended by linear bracteoles. Involucre hemispheric or subglobose, (3-)4-6 mm in diam.; receptacle hemispheric, densely white pubescent. Marginal female florets 20-30 in (1 or)2 series; corolla conical, (2-)4-toothed. Disk florets 80-120, bisexual. Achenes oblong. Fl. and fr. Jun-Oct. 2n = 18.

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