Overview
Hamamelididae is a at the rank of subclass. A well-known system that used this name is the Cronquist system, although in the disallowed spelling Hamamelidae. In the original 1981 version of this system the circumscription was:
- subclass Hamamelidae
As is true for any botanical name, circumscription of the subclass will vary with the taxonomic system being used; the only requirement being that it includes the family Hamamelidaceae. The APG II system does not recognize named taxa above the rank of order but places most of the taxa involved in the rosids clade, with Hamamelidaceae itself in order Saxifragales.
Photos
Taxonomy
The Subclass Hamamelididae is a member of the Class Magnoliopsida. Here is the complete "parentage" of Hamamelididae:
- Domain: Eukaryota
Whittaker & Margulis,1978 - eukaryotes
- Kingdom: Plantae
Haeckel, 1866
- Subkingdom: Viridaeplantae
Cavalier-Smith, 1981 - Green Plants
- Phylum: Tracheophyta
Sinnott, 1935 Ex Cavalier-Smith, 1998 - Vascular Plants
- Subphylum: Euphyllophytina
- Infraphylum: Radiatopses
Kenrick & Crane, 1997
- Class: Magnoliopsida
Brongniart, 1843 - Dicotyledons
- Subclass: Hamamelididae Takhtajan, 1967
- Class: Magnoliopsida
Brongniart, 1843 - Dicotyledons
- Infraphylum: Radiatopses
Kenrick & Crane, 1997
- Subphylum: Euphyllophytina
- Phylum: Tracheophyta
Sinnott, 1935 Ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae
Cavalier-Smith, 1981 - Green Plants
- Kingdom: Plantae
Haeckel, 1866
The Subclass Hamamelididae is further organized into finer groupings including:
- Order (17): Balanopales · Barbeyales · Buxales · Casuarinales · Cercidiphyllales · Corylales · Daphniphyllales · Didymelales · Eupteleales · Fagales · Hamamelidales · Juglandales · Myricales · Myrothamnales · Rhoipteleales · Simmondsiales · Trochodendrales
Orders
Balanopales
Barbeyales
Buxales
Buxales is a at the rank of order. [more]
Casuarinales
Casuarinaceae is a of dicotyledonous flowering plants placed in the order Fagales, consisting of 3 or 4 genera and approximately 70 species of trees and shrubs native to the Old World tropics (Indo-Malaysia), Australia, and the Pacific islands. At one time, all of the species were placed in the genus Casuarina, but these are now split among Allocasuarina, Casuarina, Ceuthostoma, and Gymnostoma. In the Wettstein system, this family was the only one placed in the order Verticillatae. Likewise, in the Engler, Cronquist and Kubitzki systems, Casuarinaceae was the only family placed in the order Casuarinales. [more]
Cercidiphyllales
Corylales
Daphniphyllales
The Daphiphllales is a valid for an order of the Magnoliopsida class. When accepted, it had only one family, Daphniphyllaceae. With regards to phylogenetic classification, this order is no longer pertinent, and the Daphniphyllaceae are part of the order of the Saxifragales. [more]
Didymelales
Eupteleales
Fagales
The Fagales are an of flowering plants, including some of the best known trees. The order name is derived from genus Fagus, Beeches. They belong among the rosid group of dicotyledons. The families currently included are as follows: [more]
Hamamelidales
Hamamelidales is the of an order of flowering plants. The Cronquist system (1981) included the order in subclass Hamamelidae with the circumscription: [more]
Juglandales
Juglandales is a botanical name for an order of . This order was recognised in several systems (e.g. Engler system and Wettstein system). The Cronquist system placed the order in the subclass Hamamelidae, as comprising the families Juglandaceae and Rhoipteleaceae, the latter consisting of only a single species. [more]
Myricales
The Fagales are an of flowering plants, including some of the best known trees. The order name is derived from genus Fagus, Beeches. They belong among the rosid group of dicotyledons. The families currently included are as follows: [more]
Myrothamnales
Rhoipteleales
Simmondsiales
Trochodendrales
At least 4 species and subspecies belong to the Order Trochodendrales.
More info about the Order Trochodendrales may be found here.
Sources
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