Английская Википедия:Annona sericea
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Annona sericea is a species of plant in the family Annonaceae. It is native to Bolivia, Brazil, Colombia, French Guiana, Guyana, Suriname, Trinidad-Tobago and Venezuela.[1] Michel Félix Dunal, the French botanist who first formally described the species, named it after the silky hairs (sericeus in Latin)[2] on its branches and leaves. In Brazil its common name is Aratincum do Para.[3]
Description
It is a tree reaching 1.3–2 meters in height. Its young branches are covered in deep red silky hairs. Its leaves are arranged in opposite rows. Its oblong, membranous leaves are 10.5-18 by 3.5-5.5 centimeters and come to a point at their tip. The leaves have numerous small spots which transmit light. The leaves are hairless on their upper surface, but hairy on their lower surface – particularly the midrib and veins which have dark red silky hairs. The leaves have 18-25 secondary veins emanating from either side of the midrib. Its petioles are 4-8 millimeters long, and covered in rust-colored silky hairs. Its flowers are on peduncles that are 11-16 millimeters long, extra-axillary, and occur alone or in pairs. The peduncles are covered in fine rust-colored hairs and have a bracteole at their midpoint. The sepals are united to form calyx with 3 oval to triangular lobes that come to a point. The outer surface of the calyx is covered in dark red hairs. Its flowers usually have 3 petals but can have 6, arranged in two alternating rows of 3. The thick, oval, concave petals are 12-16 by 10-12 millimeters, come to a shallow point. The margins of the petals touch but are not united. The outer surface of the petals is covered in rust-colored fine, silky hairs, the inner surface is covered in tawny yellow, woolly hairs. The convex receptacle of the flowers is 6 millimeters in diameter and covered in wispy yellow hairs. Its flowers have numerous stamens that are 1.8-2.2 millimeters long with short, flat filaments and 1.5-1.7 millimeter long anthers. The tissue connecting the lobes of the anthers is overgrown to form a hood covered in stiff hairs. Its carpels and club-shaped styles are 1.8-2.2 millimeters long. Its ovaries are covered in red silky hairs. Its immature, oval fruit are 2.5 centimeters long and 1.5 centimeters in diameter and covered in cone-shaped projections. Its seeds are oval and have a caruncle at one end.[4][5][6]
Reproductive biology
The pollen of Annona sericea is shed as permanent tetrads.[7]
References
External links
Шаблон:Taxonbar Шаблон:Authority control
- Английская Википедия
- Annona
- Flora of Bolivia
- Flora of Brazil
- Flora of Colombia
- Flora of French Guiana
- Flora of Guyana
- Flora of Suriname
- Flora of Trinidad and Tobago
- Flora of Venezuela
- Plants described in 1817
- Taxa named by Michel Félix Dunal
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
