''Goniothalamus chartaceus'' is a species of
plant
Plants are the eukaryotes that form the Kingdom (biology), kingdom Plantae; they are predominantly Photosynthesis, photosynthetic. This means that they obtain their energy from sunlight, using chloroplasts derived from endosymbiosis with c ...
in the family
Annonaceae
The Annonaceae are a Family (biology), family of flowering plants consisting of trees, shrubs, or rarely lianas commonly known as the custard apple family or soursop family. With 108 accepted genera and about 2400 known species, it is the largest ...
. It is native to
Vietnam
Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...
.
Hui-lin Li, the Chinese botanist who first
formally described the species, named it after its papery ( in Latin) leaves.
Description
It is a bush or small tree. It has smooth, black branches. Its
petioles are about 5 millimeters long. Its olive-colored, smooth, oblong, papery leaves are 11–17 by 1.7–2.8 centimeters and have minute spots. The leaves have a pointed base, come to a short blunt point at their tips and have slightly rolled margins. The leaves have 10–12 lateral veins emanating from either side of the midrib. Its solitary flowers are in
axillary positions on 1.2 millimeter long
pedicels
In botany, a pedicel is a stem that attaches a single flower to the inflorescence
In botany, an inflorescence is a group or cluster of flowers arranged on a plant's Plant stem, stem that is composed of a main branch or a system of branch ...
. The pedicels are subtended by 3 bracts that are 1-1.5 millimeters long and come to a point at their tips. Its 3 smooth, leathery, oval
sepal
A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106
Etymology
The term ''sepalum'' ...
s are 9 by 4 millimeters and come to a point at their tips. Its flowers have 6 petals in two rows of 3. The outer, slender, lance-shaped petals are 1.8 centimeters long and come to a point at their tips. The inner, oval to triangular petals are 1 centimeter long and come to a shallow point at their tips. The flowers have numerous
stamen
The stamen (: stamina or stamens) is a part consisting of the male reproductive organs of a flower. Collectively, the stamens form the androecium., p. 10
Morphology and terminology
A stamen typically consists of a stalk called the filament ...
about 1.5 millimeters long and numerous
carpels
Gynoecium (; ; : gynoecia) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ...
that are covered in small, brown, matted hairs.
Reproductive biology
The pollen of ''G. chartaceus'' is shed as permanent tetrads.
References
chartaceus
Flora of Vietnam
Species described in 1943
Taxa named by Hui-lin Li
{{Annonaceae-stub