Botany: insectivorous plants, acid bogs.
TaxonomyIn the
Apg2 classification Droseracaeae and allied families are included in the Poygonales. They were already closely related to
Caryophyllales and in the
Apg3 classification they became included in
Caryophyllales. Droseracaeae and allied families form a clade within
Polygonales.
In the
Plant theory Droseracaeae and allied families are treated as an Order
Droserales and placed in
Phase 7 of the Subclass
Caryophyllidae.
Droserales are mostly carnivorous plants. The placement in
Subphases is tentative.
Subphases1. Aldrovanda.
2:
Dioncophyllaceae.
3.
Drosophyllaceae.
4.
Droseraceae.
5.
6.
Nepenthaceae.
7.
Ancistrocladaceae.
Families1. Aldrovandaceae:
Aldrovanda vesiculosa, waterwheel plant, free floating aquatic plant; only 50 confirmed extant populations worldwide.
2.
Dioncophyllaceae: 3 genera; 3 species: Triphyophyllum peltatum, Habropetalum dawei, Dioncophyllum thollonii; lianas; rainforests; western Africa; carnivorous
3.
Drosophyllaceae: 1 genus, 1 species,
Drosophyllum lusitanicum; carnivorous; dry, alkaline soils; Portuguese Sundew or Dewy pine; glandular leaves, uncoil from a central rosette, coiled outward when immature; sweet aroma; sticky mucilage, ensnaring, < struggle, dying of suffocation or exhaustion.
4.
Droseraceae.
6.
Nepenthaceae7.
Ancistrocladaceae: Ancistrocladus; 12 species; lianas; tropics of the Old World; non-carnivorous. The Cronquist system, 1981, placed the family in the order
Violales, together with
Dioncophyllaceae. The Takhtajan system placed the family in its own order Ancistrocladales.