Halesia macgregorii is a species of flowering plant

Flowering plant

The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies...

 in the family Styracaceae

Styracaceae

Styracaceae is a small family of flowering plants in the order Ericales, containing 11 genera and about 160 species of trees and shrubs. The family occurs in warm temperate and subtropical regions of the Northern Hemisphere....

. It is endemic to southeastern China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

, where it grows at moderate altitudes of 700–1,200 m. It is threatened by habitat loss. Recent genetic evidence suggests it is probably more closely related to the genus Rehderodendron

Rehderodendron

Rehderodendron is a genus of five species of flowering plants in the family Styracaceae, native to southeastern Asia, from southwestern China south to Myanmar and Vietnam.The species are small deciduous trees growing to 10–15 m tall.Species...

than to other species of Halesia

Halesia

Halesia , also known as is a small genus of four or five species of deciduous large shrubs or small trees in the family Styracaceae, native to eastern Asia and eastern North America...

; it may be transferred to that genus in the future.

It is a deciduous

Deciduous

Deciduous means "falling off at maturity" or "tending to fall off", and is typically used in reference to trees or shrubs that lose their leaves seasonally, and to the shedding of other plant structures such as petals after flowering or fruit when ripe...

 tree

Tree

A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...

 growing to 24 m tall, with a trunk up to 45 cm diameter. The leaves

Leaf

A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....

 are 5–13 cm long and 3–4.5 cm broad, with a petiole 5–10 cm long. The flower

Flower

A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs...

s are pendulous, 1.5 cm long, with four white petals. The fruit

Fruit

In broad terms, a fruit is a structure of a plant that contains its seeds.The term has different meanings dependent on context. In non-technical usage, such as food preparation, fruit normally means the fleshy seed-associated structures of certain plants that are sweet and edible in the raw state,...

 is a dry drupe

Drupe

In botany, a drupe is a fruit in which an outer fleshy part surrounds a shell of hardened endocarp with a seed inside. These fruits develop from a single carpel, and mostly from flowers with superior ovaries...

2.5–4 cm long and 2–3 cm diameter.