Asimina reticulata

Asimina reticulata, the netted pawpaw, is a species of plant in the family Annonaceae. It is native to Florida in the United States.[1]

Asimina reticulata
Photograph of Asimina reticulata
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Magnoliids
Order: Magnoliales
Family: Annonaceae
Genus: Asimina
Species:
A. reticulata
Binomial name
Asimina reticulata
Synonyms

Pityothamnus reticulatus (Shuttlew. ex Chapm.) Small

Description

It is a bush reaching 1.5 meters in height. It has a deep, spindle-shaped taproot from which 1 to several shoots emerge. The shoot bark changes color with age beginning as tan or rust-colored, transitioning to brown or gray-brown and becoming gray. Its leathery, oblong leaves are 5-8 centimeters long with tips that are pointed, rounded or slightly notched. The margin of the leaves are rolled under. The young leaves have sparse orange hairs on their upper surfaces and dense orange hair and their lower surfaces. The mature leaves are hairless and pale green on their upper surface and much paler and sparsely hairy on their lower surface. Its petioles are 2-6 millimeters long. It has 1-3 flowers per node on 2-3.5 centimeter long pedicels that emerge from the axils of leaf scars. The Pedicels are covered in orange hairs. Its flowers are fragrant and have a nodding habit. Its flowers have 3 (sometimes 4) triangular sepals that are 8-10 millimeters long. The sepals have red hairs on their outer surface and are hairless on their inner surface. Its flowers have 6 petals in two rows of 3. The oval, white, outer petals are 3-7 centimeters long with wavy margins. The outer petals have orange hairs on their outer surfaces and are hairless on their inner surfaces. The fleshy inner petals are 1-3.5 centimeters, shaped like narrow triangles, rolled back on their outer surface, and have swollen bases deeply wrinkled and purple on their inner surface. The stamens form a pale green or pink androecium 0.5 centimeters in diameter. Its flowers have 3-8 spindle-shaped carpels that are covered in orange hairs. Its irregularly-shaped, yellow-green, hairless fruit are 4-7 centimeters long. Its brown, shiny seeds are 1-2 centimeters long and arranged in two irregular rows.[2][3][4]

Reproductive biology

The pollen of Asimina reticulata is shed as permanent tetrads.[5] It is pollinated by the dark flower scarab beetle Euphoria sepulcralis[6] and the hairy flower scarab beetle Trichiotinus rufobrunneus.[7]

Habitat and distribution

It has been observed growing in moist, poorly drained sand in piney flatwoods and coastal dune scrub habitats.[3]

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References
  1. "Asimina reticulata Shuttlew. ex Chapm". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved January 8, 2019.
  2. Chapman, A.W.; Eaton, Daniel C. (1883). Flora of the southern United States: containing an abridged description of the flowering plants and ferns of Tennessee, North and South Carolina, Georgia, Alabama, Mississippi, and Florida: arranged according to the natural system. New York: Ivison, Blakeman, Taylor, & Co. p. 603.
  3. Kral, Robert (1960). "A Revision of Asimina and Deeringothamnus (Annonaceae)". Brittonia. 12 (4): 233. doi:10.2307/2805119. ISSN 0007-196X.
  4. Nash, Geo. V. (1896). "Revision of the Genus Asimina in North America". Bulletin of the Torrey Botanical Club. 23 (6): 234. doi:10.2307/2477904. ISSN 0040-9618. JSTOR 2477904.
  5. Walker, James W. (1971). "Pollen Morphology, Phytogeography, and Phylogeny of the Annonaceae". Contributions from the Gray Herbarium of Harvard University. 202: 1–130. JSTOR 41764703.
  6. Cox, Anne Cheney (1998). Comparative Reproductive Biology of Two Florida Pawpaws Asimina reticulata chapman and Asimina tetramera small (Thesis). Florida International University. doi:10.25148/etd.FI14061532.
  7. Barton, Louise K.; Menges, Eric S. (2018). "Effects of Fire and Pollinator Visitation on the Reproductive Success of Asimina reticulata (Annonaceae), the Netted Pawpaw". Castanea. 83 (2): 323–333. doi:10.2179/18-170. ISSN 0008-7475.
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