How to identify bluegrass

Identification of orchid grass is mainly based on the morphological characteristics of orchid grass, as follows:

1. Rhizome: The rhizome runs horizontally and is light reddish brown. The stem is upright, green or reddish-purple, with a base length of 0.5 cm, few branches or only corymb branches at the top of the stem. All stems and branches are sparsely pubescent, and the hairs on the inflorescence branches and peduncles are denser.

2. Stems and leaves: All stems and leaves of orchids are smooth on both sides, hairless and glandular, with pinnate veins and coarse or irregular fine teeth on the edges. The stems and leaves below the middle gradually become smaller, and the leaves at the base wither during the flowering period.

3. Flowers: The flowers are white or reddish, the corolla is about 5 mm long, and there are no glands on the outside. Achenes are dark brown, oblong, 5-ridged, 3-4 mm long, hairless and glandless; the pappus is white, about 5 mm long.

Extended information:

Orchid is a plant that likes warmth and is afraid of cold. Most orchids in my country are distributed in tropical and subtropical areas. Only a few varieties (Chunlan and Cymbidium) are produced in In temperate areas, the distribution of orchids is rarely seen in the areas north of the Yellow River Basin at higher latitudes. It can be seen that bluegrass needs to live within a certain temperature range in order to grow and develop normally.

In the hot summer season, when the outside temperature is higher than 38℃, in the deep forests where orchids grow, the daytime temperature usually does not exceed 30℃ due to the good shade; in the cold winter season, the temperature When the temperature is lower than 0℃, because the orchid grass is covered with fallen leaves and snow, the surface temperature will still not be lower than 0℃. It can be seen that the adaptable temperature of the orchid grass is between 0℃ and 30℃. Generally speaking, orchid grass grows slowly when the temperature is above 30℃, and when the temperature is below 0℃, the orchid seedlings will suffer from freezing damage.

Baidu Encyclopedia-Blue Grass