Casuarinaceae
Template:Short description Template:Automatic taxobox
The Casuarinaceae are a family of dicotyledonous flowering plants placed in the order Fagales, consisting of four genera and 91 species[1] of trees and shrubs native to eastern Africa, Australia, Southeast Asia, Malesia, Papuasia, and the Pacific Islands. At one time, all species were placed in the genus Casuarina. Lawrence Alexander Sidney Johnson separated out many of those species and renamed them into the new genera of Gymnostoma in 1980 and 1982,[2][3] Allocasuarina in 1982,[3] and Ceuthostoma in 1988, with some additional formal descriptions of new species in each other genus.[4] At the time, it was somewhat controversial. The monophyly of these genera was later supported in a 2003 phylogenetic study of the family.[5] In the Wettstein system, this family was the only one placed in the order Verticillatae. Likewise, in the Engler, Cronquist, and Kubitzki systems, the Casuarinaceae were the only family placed in the order Casuarinales.
Members of this family are characterized by drooping equisetoid (meaning "looking like Equisetum"; that is, horsetail) twigs, evergreen foliage, monoecious or dioecious and infructescences ('fruiting bodies') strobiloid or cone-like, meaning combining many outward-pointing valves, each containing a seed, into roughly spherical, cone-like, woody structures. The roots have nitrogen-fixing nodules that contain the soil actinomycete Frankia.[6]
In Australia, the most widely used common name for Casuarinaceae species is sheoak or she-oak (a comparison of the timber quality with English oak). Other common names in Australia include ironwood, bull-oak or buloke, beefwood,[7] or cassowary tree.[8]
The Shire of Buloke in Victoria, Australia, is named after the species Allocasuarina luehmannii.
Systematics
Modern molecular phylogenetics suggest the following relationships:[9]
References
External links
- Template:Wikispecies-inline
- Template:Commons category-inline
- Research team from IRD working on Frankia-Casuarinaceae mycorrhizal and nitrogen-fixing symbioses
- Script error: No such module "Citation/CS1".
- Script error: No such module "citation/CS1".
Template:Angiosperm families Template:Taxonbar Template:Authority control
- ↑ Script error: No such module "Citation/CS1".
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedJohnson1980Casuarinaceae - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedJohnson1982Casuarinaceae - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedJohnson1988Casuarinaceae - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs named2003Phylogenetics - ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "citation/CS1". Cox states that the name 'she-oak' is derived from Native America sheac — beefwood.
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".