Morphological characteristics of orchids

Perennial herbs. The root is fleshy, hairless and symbiotic. With false bulb, commonly known as Reed head, wrapped with leaf sheath, often multiple pseudobulbs connected together, existing in rows at the same time. Leaves linear or sword-shaped, leathery, erect or pendulous, flowers solitary or in racemes, pedicels bearing numerous bracts. Flowers bisexual, fragrant. Corolla consists of 3 sepals, 3 petals and core column. The middle one of the sepals is called the main lobe. The next two are the sidelobe, and the extension of the sidelobe is called household. The upper 2 petals are upright, fleshy, and the apex is curled inward, commonly known as holding. The following one is the lip flap, which is larger, commonly known as Lansun. It is brown after maturity, and the seeds are fine and powdered.