Annona jahnii

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Annona jahnii
Annona jahnii.tif
Photograph of Annona jahnii leaves, flowers and fruit.
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Magnoliids
Order: Magnoliales
Family: Annonaceae
Genus: Annona
Species:
A. jahnii
Binomial name
Annona jahnii

Annona jahnii is a species of plant in the family Annonaceae. It is native to the Brazil, Colombia and Venezuela. [2] William Edwin Safford, the American botanist who first formally described the species, named it after the Venezuelan scientist, explorer and mountain climber Alfredo Jahn.

Contents

Description

It is tree reaching 4-6 meters in height. Its membranous, oval to oblong leaves are 12.5-18 by 7-10 centimeters and come to a tapering point at their tips. The mature leaves are hairless on their upper surface, except for the midrib, and have rust-colored hairs on their lower surface. Its leaves have 10-14 pairs of secondary veins emanating from their midribs. Its petioles are 6-8 millimeters, have a groove on their upper surface, and are covered in dense rust-colored hairs. Its flowers are on solitary, extra-axillary peduncles that are 12-15 millimeters long. The peduncles are covered in rust-colored hair and have a bracteole near the middle of their length. It has fused sepals with 3 triangular lobes that come to a long tapering point. It has three thick, oval petals, 20 by 18 millimeters, with margins that touch, but are not fused. The outer surface of the petals is covered in very fine light green hairs. The inner surface of the petals is covered in dense woolly gray hairs. Its inner petals are essentially absent. It has numerous stamens that are 2.5-2.8 millimeters long. The tissue connecting the lobes of the anther forms a brown, velvety cap. Its 2.6-2.8 millimeter long carpels have two styles terminating in long grooved stigmas that are covered in minute hairs. Its ovaries are covered in yellow-white to red hairs. Its oval-shape fruit are 4.5-7 by 3-4 centimeters. The fruit are covered in pyramid-shaped bumps arranged in a spiral pattern and dense rust-colored hairs. The fruit have a groove opposite their attachment point, and terminate in a woody, hooked point. Its immature, smooth, brown seeds are 9-10 by 4-5 millimeters, and have a prominent caruncle at their base. The pulp of the fruit was reported by William Safford, in 1914, to be edible, sweet and pleasantly flavored. [3]

Reproductive biology

The yellow pollen of Annona jahnii is shed as permanent tetrads. [4]

Distribution and habitat

It grows in thickly forested areas at the margins of streams. [3]

Uses

Bioactive compounds extracted from twigs have been reported to inhibit mitochondrial electron transport. [5]

Related Research Articles

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<i>Annona acuminata</i> species of plant

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<i>Annona cascarilloides</i> species of plant

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<i>Annona crassivenia</i> species of plant

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<i>Annona macroprophyllata</i> Species of plant

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<i>Annona nutans</i> Species of plant

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<i>Annona paludosa</i> Species of plant

Annona paludosa is a species of plant in the family Annonaceae. It is native to Brazil, French Guiana, Guyana, Suriname and Venezuela. Jean Baptiste Christophore Fusée Aublet, the French pharmacist and botanist who first formally described the species, named it after its swampy habitat.

Annona sclerophylla is a species of plant in the family Annonaceae. It is native to Cuba. William Edwin Safford, the American botanist who first formally described the species, named it after its rigidly hard leaves.

Annona stenophylla is a species of plant in the family Annonaceae. It is native to Tanzania and Zambia. Adolf Engler and Ludwig Diels, the German botanists who first formally described the species, named it after its narrow leaves.

<i>Cremastosperma cauliflorum</i> Species of plant

Cremastosperma cauliflorum is a species of plant in the family Annonaceae. It is native to Brazil, Colombia, Ecuador and Peru. Robert Elias Fries, the Swedish botanist who first formally described the species, named it after its flowers which grow from its main trunk or stem.

<i>Fusaea longifolia</i> Species of plant


Fusaea longifolia is a species of plant in the family Annonaceae. It is native to Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname and Venezuela. Jean Baptiste Christophore Fusée Aublet, the French botanist who first formally described the species using the basionym Annona longifolia, named it after its long-leaved foliage.

Fusaea decurrens is a species of plant in the family Annonaceae. It is native to Peru. Robert Elias Fries. The Swedish botanist who first formally described the species, named it after wings of the leaves that run down the stem of the leaf.

Fusaea peruviana is a species of plant in the family Annonaceae. It is native to Brazil, Colombia, Ecuador and Peru. Robert Elias Fries, the Swedish botanist who first formally described the species, named it after Peru where the specimen he examined was found near the Huallaga River and the city of Yurimaguas.

Goniothalamus velutinus is a species of plant in the family Annonaceae. It is native to Borneo. Herbert Airy Shaw, the English botanist who first formally described the species, named it after the dense velvety hair on its branchlets and petioles.

<i>Hexalobus monopetalus</i> species of plant in the family Annonaceae

Hexalobus monopetalus is a species of plant in the family Annonaceae. It is native to Angola, Benin, Botswana, Burkina Faso, Cameroon, Central African Republic, Chad, Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Malawi, Mali, Mozambique, Namibia, Niger, Nigeria, Senegal, South Africa, Sudan, Tanzania, Togo, Uganda, Zambia, Zaire and Zimbabwe. Achille Richard, the French botanist who first formally described the species, using the basionym Uvaria monopetala, named it after its petals which are fused at their base.

Annona moaensis is a species of plant in the family Annonaceae. It is endemic to Cuba. Frère León and Henri Alain Liogier, the botanists who first formally described the species, named it after Moa, Cuba where the specimen they observed was collected.

References

  1. ↑ Botanic Gardens Conservation International (BGCI) & IUCN SSC Global Tree Specialist Group 2019 (2019). "Annona jahnii". IUCN Red List of Threatened Species . 2019: e.T143323921A143323923. doi: 10.2305/IUCN.UK.2019-1.RLTS.T143323921A143323923.en . Retrieved July 12, 2019.
  2. ↑ "Annona jahnii Saff". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved January 3, 2019..
  3. 1 2 Safford, W.E. (1914). "Classification of the Genus Annona, with Descriptions of New and Imperfectly Known Species". Contributions from the United States National Herbarium. 18: 1–68.
  4. ↑ Walker, James W. (1971). "Pollen Morphology, Phytogeography, and Phylogeny of the Annonaceae". Contributions from the Gray Herbarium of Harvard University. 202 (202): 1–130. JSTOR   41764703.
  5. ↑ Colman-Saizarbitoria, Trina; Montilla, Linda; Rodriguez, Maria; Castillo, Aníbal; Hasegawa, Masahisa (2009). "Xymarginatin: a new acetogenin inhibitor of mitochondrial electron transport from Xylopia emarginata Mart., Annonaceae". Revista Brasileira de Farmacognosia. 19 (4): 871–875. doi: 10.1590/S0102-695X2009000600013 . ISSN   0102-695X.
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