Annona sericea
Botanical illustration of Annona sericea
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Magnoliids
Order: Magnoliales
Family: Annonaceae
Genus: Annona
Species:
A. sericea
Binomial name
Annona sericea
Synonyms

Annona jenmanii Saff.
Annona trinitensis 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

  1. ↑ 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. Retrieved 28 April 2021.
  2. ↑ "Annona sericea Dunal". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved January 4, 2019.
  3. ↑ Stearn, William (2004). Botanical Latin. Portland, Ore. Newton Abbot: Timber Press David & Charles. ISBN 9780881926279.
  4. ↑ 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.
  5. ↑ Dunal, Michel-Félix (1817). Monographie de la famille des Anonacées [Monograph of the family Anonaceae] (in French and Latin). Paris: Treuttel et Würtz.
  6. ↑ Safford, William E. (1913). "Annona sericea and its Allies". Contributions from the United States National Herbarium. 16: 263–275.
  7. ↑ Cuvier, Frédéric (1818). Dictionnaire des Sciences Naturelles (in French). Strasbourg: F. G. Levrault.
  8. ↑ 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. JSTOR 41764703. S2CID 249081277.
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