Investigation of Walnut Tree on May 19, 218

Location: near the main building of Harbin Medical University

Weather: sunny? 26℃? Southwest wind level 3-4

The structure of female flower and fruiting place observed last time was mainly observed, except for B,G,H and J, which were not observed due to the high branches. Among them, C tree observed that the red part was extracted from the result, which was presumed to be a female flower.

Question: Most of the observed trees with female flower structure have many or almost no stamens falling off, so how to complete pollination? Or did the structure appear after successful pollination?

A:

B:

L:

Two stamens were found on the far lower branch near the trunk of tree C, which were dark brown, slightly curved and similar to withered

C: almost no stamens

Almost all visible stamens were withered

D:

D：

F: There were almost no stamens, only withered < Sporadic withered

I: stamens are still many

M: stamens are basically not

J: stamens are much less than last time

K: stamens are still more

p.s. The growth at the crown of branches can be roughly divided into two situations: leaf buds, flower bud structures presumed to be female flowers

Trees in other courtyards (trees with red dust) Juglans regia, born on slopes and hilly areas at an altitude of 4-18 meters, has a flowering period of May and a fruiting period of October. Sandy loam, which is fertile and moist, is commonly found in deep soil layers on both sides of mountain valleys. Agricultural cultivation is generally in low mountains and hills about 2 meters above sea level.

The inflorescence of male Euonymus japonicus is drooping, about 5-1 cm long and as thin as 15 cm. Bracts, bracteoles and perianth segments of male flowers are glandular hairy; Stamens 6 ~ 3, anthers yellow, glabrous.

Female spikes usually have 1 ~ 3 (~ 4) female flowers. The involucre of female flowers is very short glandular hairy, and the stigma is light green.

The fruit sequence is short, with 1 ~ 3 fruits. The fruit is nearly spherical, with a diameter of 4 ~ 6 cm and no hair; The stone is slightly wrinkled, with 2 longitudinal edges and a short tip; The diaphragm is thin and there is no gap inside; There are irregular gaps or no gaps in the endocarp wall but only wrinkles. ——by. Du Niang/dpool/blog/s/blog _ 63c3E48A 12VH5.html.