Biology:Agave bracteosa
| Agave bracteosa | |
|---|---|
| |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Asparagaceae |
| Subfamily: | Agavoideae |
| Genus: | Agave |
| Species: | A. bracteosa
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| Binomial name | |
| Agave bracteosa S. Wats. ex Engelm. 1882
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Agave bracteosa is a species of agave sometimes known as spider agave or squid agave. It is native to the Sierra Madre Oriental of México (spanning the states of Tamaulipas, Coahuila and Nuevo León), where it prefers well-drained and shaded or semi-protected locations on cliffs and rocky slopes from 900 to 1,700 meters.[2] Although it occupies a small range, it is not considered to be threatened.[1]
Small among the agaves, its green and succulent leaves are long and lanceolate, 50–70 cm long and 3–5 cm at the base, where they are the widest. Compared to the larger, more formidable agaves, they have minute serrations (teeth) along the margins but neither teeth, nor terminal spine, at the leaf tip. The leaves have a tendency to curl somewhat, in a fashion reminiscent of the octopus agave A. vilmoriniana. The inflorescence spike is also short, at 1.2–1.7 meters, and its upper-third is densely covered with white or pale-yellow flowers. The flowers are distinctive, in that tepals arise from a disk-shaped receptacle rather than the usual tube. The stamens are quite long.[3]
Gentry defines a group "Choritepalae" that includes A. bracteosa along with Agave ellemeetiana and Agave guiengola, and states that the discoid receptacle and unarmed leaves are different enough from other agaves to justify placing A. bracteosa and A. ellemeetiana into a separate genus, but the characteristics of A. guiengola link the group to the rest of Agave.
References
- ↑ 1.0 1.1 González-Elizondo, M.; Zamudio, S.; Hernández Sandoval, L.; Sánchez, E.; Hernández-Martínez, M.; Matías-Palafox, M. (2018). "Agave bracteosa". IUCN Red List of Threatened Species 2018: e.T114937043A114963426. doi:10.2305/IUCN.UK.2018-2.RLTS.T114937043A114963426.es. https://www.iucnredlist.org/species/114937043/114963426. Retrieved 19 November 2021.{{cite iucn}}: error: malformed |doi= identifier (help)
- ↑ Engelmann, Georg, Garden Chronicles 2:18, 776, fig 138, 139. 1882.
- ↑ Howard Scott Gentry, Agaves of Continental North America (University of Arizona Press, 1982) pp. 91-93
Wikidata ☰ Q140482 entry
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