This MedLibrary.org supplementary page on Agavaceae is provided directly from the open source Wikipedia as a service to our readers. Please see the note below on authorship of this content, as well as the Wikipedia usage guidelines. To search for other content from our encyclopedia supplement, please use the form below:
Related Sponsors
| Agave family | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
 |
||||||||||
| Scientific classification | ||||||||||
|
||||||||||
| Type genus | ||||||||||
| Agave L. |
||||||||||
| Genera | ||||||||||
|
See text. |
Agavaceae is a family of plants that includes many well-known desert and dry zone types such as the agave, yucca, and Joshua tree. The family includes about 550-600 species in around 18 genera, and is widespread in the tropical, subtropical and warm temperate regions of the world.
The circumscription of this family has varied widely. Some genera (e.g. Cordyline and Dracaena) are sometimes separated off into a separate family, Dracaenaceae, though recent research has tended to incorporate these into a larger family Ruscaceae. Nolina, Beaucarnea, and Dasylirion are sometimes recognized as Nolinaceae or placed in Ruscaceae. Conversely, data from molecular systematics now suggest that Agavaceae should be broadened to include a number of genera previously classified elsewhere, among them Chlorogalum, Camassia and the family Anthericaceae with anything up to 22 additional genera. The Angiosperm Phylogeny Group's APG II classification places Agavaceae, along with a number of other families (including Ruscaceae) in an expanded family Asparagaceae. However, APG II allows the alternative of keeping some of these families, including Agavaceae, separate, though in this case it recommends expanding the family to include the genera currently classified in Anemarrhenaceae, Anthericaceae (with Anthericum and Paradisea), Behniaceae and Herreriaceae. Most references have retained Agavaceae (in varying circumscriptions) as a family distinct from Asparagaceae. Hesperocallis, sometimes placed in its own family, Hesperocallideaceae, has recently been shown to be closely related and its inclusion in Agavaceae has been recommended (Pires et al. 2004).
Species may be succulent or not. In general, Agavaceae leaves occur as rosettes at the end of a woody stem, which may range from extremely short to tree-like heights, as in the Joshua tree. The leaves are parallel-veined, and usually appear long and pointed, often with a hardened spine on the end, and sometimes with additional spines along the margins.
Agave species are used to make pulque and mezcal, while others are valued for their fibers. They are quite popular for xeriscaping, many types having showy flowers.
Genera
- Agave
- Anemarrhena
- Behnia
- Beschorneria
- Bravoa
- Camassia
- Chlorogalum
- Chlorophytum
- Clistoyucca
- Eremocrinum
- Furcraea
- Herreria
- Hesperaloe
- Hesperocallis
- Hesperoyucca
- Hosta
- Littaea
- Manfreda
- Polianthes
- Prochnyanthes
- Pseudobravoa
- Samuela
- Yucca
References
- D. J. Bogler, J. C. Pires and J. Francisco-Ortega (2006). "Phylogeny of Agavaceae based on ndhF, rbcL, and its sequences: implications of molecular data for classification". Aliso 22: 313–328.
- David J. Bogler and Beryl B. Simpson (1995). "A Chloroplast DNA Study of the Agavaceae". Systematic Botany 20: 191–205. doi:, http://links.jstor.org/sici?sici=0363-6445%28199504%2F06%2920%3A2%3C191%3AACDSOT%3E2.0.CO%3B2-L.
- David J. Bogler and Beryl B. Simpson (September 1996). "Phylogeny of Agavaceae Based on ITS rDNA Sequence Variation". American Journal of Botany 83 (9): 1225–1235. doi:, http://links.jstor.org/sici?sici=0002-9122%28199609%2983%3A9%3C1225%3APOABOI%3E2.0.CO%3B2-6.
- J. C. Pires, I. J. Maureira, J. P. Rebman, G. A. Salazar, L. I. Cabrera, M. F. Fay, and M. W. Chase (2004). "Molecular data confirm the phylogenetic placement of the enigmatic Hesperocallis (Hesperocallidaceae) with Agave". Madroño 51: 307–311.
External links
- Agavaceae in Flora of North America.
- Agavaceae in L. Watson and M.J. Dallwitz (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, information retrieval.
- Die Agaven.
Wikipedia content modification information:
- This page was last modified on 13 November 2008, at 02:27.
Wikipedia Authorship and Review
Wikipedia content provided here is not reviewed directly by MedLibrary.org. Wikipedia content is authored by an open community of volunteers and is not produced by or in any way affiliated with MedLibrary.org.
Wikipedia Usage Guidelines
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article on "Agavaceae".
The URL for this specific entry is:
All Wikipedia text is available under the terms of the GNU Free Documentation License. (See Copyrights for details). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc.