Petrosaviaceae
{{Short description|Family of flowering plants}}
{{expand Spanish|Petrosaviaceae|date=January 2016}}
{{Automatic taxobox
| image = The botanical magazine = Shokubutsugaku zasshi (1903) (20407475671).jpg
| image_caption =Petrosavia sakuraii
| parent_authority = Takht.
| taxon = Petrosaviaceae
| authority = Hutch.{{Cite journal |last=Angiosperm Phylogeny Group |year=2009 |title=An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III |journal=Botanical Journal of the Linnean Society |volume=161 |issue=2 |pages=105–121 |doi=10.1111/j.1095-8339.2009.00996.x |doi-access=free |hdl=10654/18083 |hdl-access=free }}
| type_species = Petrosavia stellaris
| type_species_authority = Becc.
| subdivision_ranks = Genera
| subdivision = * Japonolirion
}}
Petrosaviaceae is a family of flowering plants belonging to a monotypic order, Petrosaviales. Petrosaviales are monocots, and are grouped within the lilioid monocots. Petrosaviales is a very small order composed of one family, two genera and four species accepted in 2016.{{cite journal |author1=Christenhusz, M. J. M. |author2=Byng, J. W. |name-list-style=amp | year = 2016 | title = The number of known plants species in the world and its annual increase | journal = Phytotaxa | volume = 261 | pages = 201–217 | url = http://biotaxa.org/Phytotaxa/article/download/phytotaxa.261.3.1/20598 | doi = 10.11646/phytotaxa.261.3.1 | issue = 3 | doi-access = free }} Some species are photosynthetic (Japonolirion) and others are rare, leafless, chlorophyllous, mycoheterotrophic plants (Petrosavia). The family is found in low-light montane rainforests in Japan, China, Southeast Asia and Borneo. They are characterised by having bracteate racemes, pedicellate flowers, six persistent tepals, septal nectaries, three almost-distinct carpels, simultaneous microsporogenesis, monosulcate pollen, and follicular fruit.{{sfn|ps=none|Cameron|Chase|Rudall|2003}}
Taxonomy
The family has only been recognized in modern classifications; previously, the family members were typically treated as belonging to the Liliaceae. The APG II system recognized the family and assigned it to the clade monocots, unplaced as to order. The APG III system of 2009 and the APG IV system of 2016 placed the family Petrosaviaceae in the order Petrosaviales.{{Cite journal|author=Angiosperm Phylogeny Group |year=2016|title=An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV|journal=Botanical Journal of the Linnean Society|volume=181|issue=1|pages=1–20|issn=0024-4074|doi=10.1111/boj.12385|doi-access=free}}
=Genera=
{{As of|2016|June}}, two genera are accepted by the World Checklist of Selected Plant Families:{{cite web |title=Search for Petrosaviaceae|work=World Checklist of Selected Plant Families |publisher=Royal Botanic Gardens, Kew |url=http://apps.kew.org/wcsp/qsearch.do?plantName=Petrosaviaceae |access-date=2016-06-12 }}
- Japonolirion Nakai, with one species
- Petrosavia Becc, with three species
Distribution and habitat
The plant species in both genera are found in high-elevation habitats.
References
{{Reflist}}
Bibliography
{{refbegin}}
- {{citation|last1=Cameron|first1=Kenneth M.|last2=Chase|first2=Mark W.|last3=Rudall|first3=Paula J.|author-link2=Mark W Chase|author-link3=Paula Rudall|title=Recircumscription of the monocotyledonous family Petrosaviaceae to include Japonolirion|journal=Brittonia|date=July 2003|volume=55|issue=3|pages=214–225|doi=10.1663/0007-196X(2003)055[0214:ROTMFP]2.0.CO;2|jstor=3218442 |s2cid=39771490 }}
{{refend}}
External links
- [http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=124741 Petrosavia in Flora of China]
- [http://www.csdl.tamu.edu/FLORA/cgi/gateway_family?fam=Petrosaviaceae links at CSDL, Texas]
- [http://www.theplantlist.org/1.1/browse/A/Petrosaviaceae/ The Plant List]
- {{Commons-inline}}
- {{Wikispecies-inline}}
{{monocotyledons}}
{{Angiosperm families}}
{{Taxonbar|from=Q131296}}