Biology:Annona sericea
| Annona sericea | |
|---|---|
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| Botanical illustration of Annona sericea | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Magnoliids |
| Order: | Magnoliales |
| Family: | Annonaceae |
| Genus: | Annona |
| Species: | A. sericea
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| Binomial name | |
| Annona sericea | |
| Synonyms | |
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Annona jenmanii Saff. | |
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.[2] Michel Félix Dunal, the French botanist who first formally described the species, named it after the silky hairs (sericeus in Latin)[3] on its branches and leaves. In Brazil its common name is Aratincum do Para.[4]
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.[5][6][7]
Reproductive biology
The pollen of Annona sericea is shed as permanent tetrads.[8]
References
- ↑ Verspagen, N.; Erkens, R.H.J. (2021). "Annona sericea". IUCN Red List of Threatened Species 2021: e.T142423785A142423792. doi:10.2305/IUCN.UK.2021-1.RLTS.T142423785A142423792.en. https://www.iucnredlist.org/species/142423785/142423792. Retrieved 28 April 2021.
- ↑ "Annona sericea Dunal". The Trustees of the Royal Botanic Gardens, Kew. n.d.. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:72310-1.
- ↑ Stearn, William (2004). Botanical Latin. Portland, Ore. Newton Abbot: Timber Press David & Charles. ISBN 9780881926279.
- ↑ Campos, Francinete R.; Batista, Regiane L.; Batista, Cristiane L.; Costa, Emmanoel V.; Barison, Andersson; dos Santos, Adriane G.; Pinheiro, Maria Lúcia B. (2008). "Isoquinoline alkaloids from leaves of Annona sericea (Annonaceae)". Biochemical Systematics and Ecology 36 (10): 804–806. doi:10.1016/j.bse.2008.07.005. ISSN 0305-1978.
- ↑ Dunal, Michel-Félix (1817) (in French, Latin). Monographie de la famille des Anonacées. Paris: Treuttel et Würtz. https://www.biodiversitylibrary.org/item/146600.
- ↑ Safford, William E. (1913). "Annona sericea and its Allies". Contributions from the United States National Herbarium 16: 263–275. https://www.biodiversitylibrary.org/item/13776.
- ↑ Cuvier, Frédéric (1818) (in French). Dictionnaire des Sciences Naturelles. Strasbourg: F. G. Levrault. https://www.biodiversitylibrary.org/item/80274.
- ↑ Walker, James W. (1971). "Pollen Morphology, Phytogeography, and Phylogeny of the Annonaceae". Contributions from the Gray Herbarium of Harvard University 202 (202): 1–130. doi:10.5962/p.272704.
External links
Wikidata ☰ Q15399578 entry
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