Scientific name: Oxalis? Rubbra? Alias: clover, oxalis macrophylla, safflower hydrochloride, oxalis macrophylla, acid grass, oxalis purpurea, copperhead snake, etc. ? Origin: South America, Brazil.

Perennial herb with a plant height of 15-25 cm. With a huge spindle-shaped rhizome. The whole plant is covered with fine white hairs. Basal leaves, long stalks, 3 leaflets palmately inverted heart-shaped, and soft back. Flowering stems are pulled out at the base, umbels, slightly higher than leaves. Flowers are dark rose with longitudinal stripes. Flowering from April to165438+1October? . Flowers and leaves open during the day and close at night. There are all kinds of white flowers and purple flowers.

Prefer warmth, dislike cold, avoid heat, grow slowly or hibernate in midsummer, like shade, have strong tolerance to shade, and are suitable for soil with humus and good drainage. ? Use asexual reproduction. Vegetative propagation is divided into bulb propagation and ramet propagation. The conjoined stems of oxalis purpurea can be divided into three types: mother bulb, gemmule and leaf bulb. Among the three kinds of bulbs, the mother bulb has the ability to split into bulbs directly, with a diameter of 2 to 2.5 cm, residual leaf scars and latent buds at the leaf scars, which can germinate and grow into bulbs one after another. Bud bulb is a young bulb growing on the mother bulb, and the diameter of the bulb is about 0.5 to 0.8 cm. Leaf bulbs are leafy bulbs that grow from bud bulbs and grow leaves. They can bloom, about 1.2 to 1.5 cm, and grow and develop into female bulbs. According to the experiment, the propagation coefficient of a single bulb is high, and about 15 ~ 17 bulbs can be obtained for each single bulb on average. The survival rate of mother bulbs and leaf bulbs in the open field is almost the same, but the reproductive coefficient of leaf bulbs is the highest. ? The breeding process is best carried out in spring and autumn to improve the survival rate. ? Do a good job in weeding, watering, fertilizing and pest control in intertillage in time. Generally, it is beneficial to plant growth to water or rain in spring (April-May) and autumn (July-August) or to furrow and apply chemical fertilizer (5 kg urea+10 kg compound fertilizer).

Oxalis purpurea:? Perennial erect stemless herbs. Leaves clustered, all root leaves, 3 leaflets, broadly obovate, leaves wider than long and soft. Inflorescence basal, as long as leaves or slightly longer, with 5- 10 florets, lavender. ? Oxalis grandiflora? :? A perennial herb with leaves clustered from the base. 3 leaflets, inverted heart-shaped, umbel with 8- 12 florets, dark pink. ? Oxalis: a perennial herb, the whole plant is puberulent, the stem is soft and creeping, and adventitious roots are born between nodes. Compound leaves alternate, petiole slender, 3 leaflets, inverted heart. Umbrella axillary, composed of 1 to several flowers, with smaller yellow flowers. Fruit subcylindric, pubescent. ? In addition, there is Oxalis (O? Pescaprae), O.oregana, etc.