''Pentaphragma'' is a genus of flowering plants. ''Pentaphragma'' is the sole genus in Pentaphragmataceae, a
family
Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
in the
order
Order, ORDER or Orders may refer to:
* A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica
* Categorization, the process in which ideas and objects are recognized, differentiated, and understood
...
Asterales
Asterales ( ) is an Order (biology), order of dicotyledonous flowering plants that includes the large Family (biology), family Asteraceae (or Compositae) known for composite flowers made of Floret#floret, florets, and ten families related to th ...
. These species are fleshy
herb
Herbs are a widely distributed and widespread group of plants, excluding vegetables, with savory or aromatic properties that are used for flavoring and garnishing food, for medicinal purposes, or for fragrances. Culinary use typically distingu ...
s, with asymmetrical leaf blades. They are found in
Southeast Asia
Southeast Asia is the geographical United Nations geoscheme for Asia#South-eastern Asia, southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Mainland Au ...
. ''Pentaphragma'' is rayless, but eventually develops rays in at least one of the species studied. This is interpreted as related to secondary woodiness or upright habit within a predominantly herbaceous phylad. The vessel elements of ''Pentaphragma'' have features universally interpreted as primitive in dicotyledons: scalariform perforation plates with numerous bars; pit membrane remnants in perforations; scalariform lateral wall pitting; the genus also has fiber-tracheids with prominently bordered pits. The presence of occasional scalariform perforation plates, often aberrant, in secondary xylem of families of Asterales sensu lato - Campanulaceae, Pentaphragmataceae, Valerianaceae, and even Asteraceae (e.g., certain Lactuceae) - can be attributed to paedomorphosis, extending these plates into secondary xylem from primary xylem. Raylessness in ''Pentaphragma'' can be described in terms of secondary woodiness or paedomorphosis. The fact that fiber-tracheids are shorter than vessel elements in ''Pentaphragma'' is believed related to raylessness also, because some fiber-tracheids are produced from 'potential' ray areas.
Species
* ''
Pentaphragma bicolor
''Pentaphragma'' is a genus of flowering plants. ''Pentaphragma'' is the sole genus in Pentaphragmataceae, a family in the order Asterales. These species are fleshy herbs, with asymmetrical leaf blades. They are found in Southeast Asia
Sout ...
''
* ''
Pentaphragma pendula
''Pentaphragma'' is a genus of flowering plants. ''Pentaphragma'' is the sole genus in Pentaphragmataceae, a family in the order Asterales. These species are fleshy herbs, with asymmetrical leaf blades. They are found in Southeast Asia. ''Pentaph ...
''
* ''
Pentaphragma longisepalum
''Pentaphragma'' is a genus of flowering plants. ''Pentaphragma'' is the sole genus in Pentaphragmataceae, a family in the order Asterales. These species are fleshy herbs, with asymmetrical leaf blades. They are found in Southeast Asia. ''Pentaph ...
''
* ''
Pentaphragma lambirense
''Pentaphragma'' is a genus of flowering plants. ''Pentaphragma'' is the sole genus in Pentaphragmataceae, a family in the order Asterales. These species are fleshy herbs, with asymmetrical leaf blades. They are found in Southeast Asia. ''Pentaph ...
''
* ''
Pentaphragma prostratum
''Pentaphragma'' is a genus of flowering plants. ''Pentaphragma'' is the sole genus in Pentaphragmataceae, a family in the order Asterales. These species are fleshy herbs, with asymmetrical leaf blades. They are found in Southeast Asia. ''Pentaph ...
''
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References
External links
Asterales genera
Asterales
{{Asterales-stub