1, rape flower
Rape is the most common yellow flower and the most widely distributed yellow flower, which belongs to Brassica of Cruciferae.
2. Marigold plants
Calendula is a plant of Calendula in Compositae. Annual or perennial herb, the whole plant is covered with white hair. Simple leaves alternate, elliptic or elliptic obovate, entire, basal leaves with stalks, upper leaves with stalks. The flower head has a solitary stem top, which is larger, 4-6cm, with one or more rounds of tongue-shaped flowers spreading, golden yellow or orange, tubular flowers, yellow or brown.
There are also double petals (actually multi-layered tongue-shaped flowers), rolled petals, green hearts, deep purple hearts and other cultivated varieties. The flowering period is 65438+February-June, and the flowering period is March-June. Achenes, boat-shaped and claw-shaped, mature from May to July.
3. Chrysanthemum morifolium
Chrysanthemum morifolium is a perennial herb of Chrysanthemum in Compositae, with a height of 3-45 cm, underground creeping rhizomes, erect stems, solitary, unbranched, rarely with 1-2 short branches, densely long or pubescent, but the lower hairs become sparse to hairless;
Head, solitary stem tip, rarely stem with 2-3 heads, involucre saucer-shaped, tongue-shaped flowers white and pink. The tip of the tongue is 3-toothed or slightly concave. Achenes are about 2 mm long. The flowering and fruiting period is from June to August. It is distributed in Hebei, Shaanxi, Jilin and other places in Chinese mainland, and grows at an altitude of 1800 to 3000m.
4. Ai Ju
Ai Ju is a perennial herb of Chrysanthemum in Compositae, with a height of 30- 150 cm, erect stems, single or few stems clustered, only branches on the upper part, and single hairs are very sparse, but usually smooth and hairless. Most of the stems and leaves are ovoid or ovoid, and most of the spikes (10-20) are arranged at the top of the stems and branches in a dense umbrella or compound umbrella. The fruiting period of chrysanthemum is from June to August. Heilongjiang and Xinjiang (Altai and Tianshan).
5. Acorus calamus
Acorus calamus, also known as Acorus tingensis, is a perennial wet or emergent perennial herb of Iris in Iris family, with tall plants and short and thick rhizomes. The leaves are dense, basal, green, sword-shaped, 60- 100 cm long, with obvious midvein and transverse reticular veins.
The flower stems are slightly higher than the leaves, the petals are oblong, the base is nearly as wide, with or without brown stripes, the flag petals are light yellow, and the flower diameter is 8 cm. The capsule is long and contains many seeds. It is brown and angular. Flowering in May-June, native to Europe.
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