Annona rigida
| Annona rigida | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Magnoliids |
| Order: | Magnoliales |
| Family: | Annonaceae |
| Genus: | Annona |
| Species: | A. rigida
|
| Binomial name | |
| Annona rigida | |
Annona rigida is a species of plant in the family Annonaceae. It is native to Brazil and Colombia.[1] Robert Elias Fries, the Swedish botanist who first formally described the species, named it after its rigid (rigidus in Latin) leaves.[2][3]
Description[edit]
It is a bush. Its rigid, oblong, yellow-green leaves are 12-20 by 3-5 centimeters, hairless and have pointed tips. Its solitary flowers are on thick, rigid pedicels that are 0.5-1 centimeter long with a 3-5 millimeter oval bract near their base. Its oval to triangular sepals are 4-5 millimeters long, recurved and come to a point at their tip. It has two rows of petals. The oval, wrinkled, warty outer petals are 3 by 2 centimeters. The outer petals have margins that touch but are not fused. The outer surface of the inner petals is covered in dense woolly hairs. Its stamen are 5 millimeters long. Its immature fruit are round with a diameter of 2–3.5 centimeters and covered in conical projections. Its flowers have numerous carpels.[3]
Reproductive biology[edit]
The pollen of A. rigida is shed as permanent tetrads.[4]
Distribution and habitat[edit]
It grows in the Amazon rainforest.[5]
References[edit]
- ^ "Annona rigida R.E.Fr". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved July 24, 2019..
- ^ Stearn, William (2004). Botanical Latin. Portland, Ore. Newton Abbot: Timber Press David & Charles. ISBN 9780881926279.
- ^ a b Fries, Rob. E. (1957). "New Species of Annonaceae from the Upper Amazon Basin". Arkiv för Botanik (in English and Latin). 3 (18): 599–606.
- ^ 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.
- ^ "Annona rigida R.E.Fr". Flora do Brasil 2020. Jardim Botânico do Rio de Janeiro. Retrieved July 24, 2019.
External links[edit]
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