Morphological characteristics of Artemisia annua

Plant properties

Morphological characteristics

Annual herb; plants have aroma. Some places are also called ursinum. The main root is single, vertical, with less lateral roots. Stems solitary, 30-150 cm tall, much branched above, green when young, with vertical stripes, slightly lignified below, slender, glabrous. Leaves on both sides of green or pale green, glabrous; basal leaves and stem lower leaves three times dentate pinnately divided, long petioles, flowering leaves withered; middle leaves oblong, oblong-ovate or elliptic, long 5–15 cm, width 2–5.5 cm, bifurcation dentate pinnate, first cracked, 4–6 lobes on each side, lobes oblong, base cuneate, with multiple pieces per lobe Long triangular caries or small, slightly linear lanceolate lobule, apex acute, often with 1-3 small or non-cracking teeth on both sides, the central axis and lobes often with small serrations The petiole is 0.5-1 cm long. The base has a small, semi-synaptic, false stipules. The upper leaves and the zygomatic leaves are one (to two) purslane-like, with sessile stems. Heads hemispherical or subhemispheric, 3.5-4 mm in diam., shortly stalked, pendulous, base linear-shaped, small temporal lobes, spikelike racemes arranged on branches, and in stalks On moderately developed panicle inflorescences; total sepals 3–4 layers, outer sepals narrow, long ovate or ovate-lanceolate, abaxially green, glabrous, with fine white dots, margin broad membranous, leaf Alternate, dark green or brownish green, curled, crushed, slightly thicker in middle layer, broadly ovate or long ovate, margin broadly membranous, innermost sepals semimembrane or membranous, apically rounded; inflorescence support Spherical; flowers pale yellow; female flowers 10-20, corolla narrow tube, axillary with 2 split teeth, style extends out of the corolla tube, apex 2 fork, fork tip; bisexual flower 30-40, bred or middle several flowers Infertile, corolla tubular, anther linear, apex appendaged, long triangular, base obtuse, style and corolla as long or slightly longer than corolla, apical two fork, fork end truncate, with lashes. Achenes oblong to elliptic. Flower and fruit period from June to September.

青蒿


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