Petrosaviaceae
Encyclopedia
Petrosaviaceae is the botanical name
of a family
of flowering plants. Such a family has been recognized by only few taxonomists: the plants involved were usually treated as belonging to the family Liliaceae
.
The APG II system
, of 2003, does recognize this family and assigns it to the clade monocots, unplaced as to order. This family then consists of two genera Japanolirion
and Petrosavia
. In circumscribing the family in this way, APG II departs from the APG system
, of 1998, which treated each of these genera as constituting its own family. The APG III system
, of 2009, place family Petrosaviaceae in order Petrosaviales.
Japanolirion
is taken to consist of one species and Petrosavia
of three species. The plants in both genera are found in high-elevation habitats and have bracteate racemes, pedicellate flowers, six persistent tepals, septal nectaries, three nearly distinct carpels, simultaneous microsporogenesis, monosulcate pollen, and follicular fruits.
Botanical name
A botanical name is a formal scientific name conforming to the International Code of Botanical Nomenclature and, if it concerns a plant cultigen, the additional cultivar and/or Group epithets must conform to the International Code of Nomenclature for Cultivated Plants...
of a family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
of flowering plants. Such a family has been recognized by only few taxonomists: the plants involved were usually treated as belonging to the family Liliaceae
Liliaceae
The Liliaceae, or the lily family, is a family of monocotyledons in the order Liliales. Plants in this family have linear leaves, mostly with parallel veins but with several having net venation , and flower arranged in threes. Several have bulbs, while others have rhizomes...
.
The APG II system
APG II system
The APG II system of plant classification is the second, now obsolete, version of a modern, mostly molecular-based, system of plant taxonomy that was published in April 2003 by the Angiosperm Phylogeny Group. It was a revision of the first APG system, published in 1998, and was superseded in 2009...
, of 2003, does recognize this family and assigns it to the clade monocots, unplaced as to order. This family then consists of two genera Japanolirion
Japanolirion
Japanolirion is a genus in the family Petrosaviaceae. It includes a single species endemic to Japan.-External links:**...
and Petrosavia
Petrosavia
Petrosavia is a genus in the family Petrosaviaceae. It includes three species from east Asia....
. In circumscribing the family in this way, APG II departs from the APG system
APG system
The APG system of plant classification is the first, now obsolete, version of a modern, mostly molecular-based, system of plant taxonomy that was published in 1998 by the Angiosperm Phylogeny Group. It was superseded in 2003 by a revision, the APG II system, and then in 2009 by a further...
, of 1998, which treated each of these genera as constituting its own family. The APG III system
APG III system
The APG III system of flowering plant classification is the third version of a modern, mostly molecular-based, system of plant taxonomy...
, of 2009, place family Petrosaviaceae in order Petrosaviales.
Japanolirion
Japanolirion
Japanolirion is a genus in the family Petrosaviaceae. It includes a single species endemic to Japan.-External links:**...
is taken to consist of one species and Petrosavia
Petrosavia
Petrosavia is a genus in the family Petrosaviaceae. It includes three species from east Asia....
of three species. The plants in both genera are found in high-elevation habitats and have bracteate racemes, pedicellate flowers, six persistent tepals, septal nectaries, three nearly distinct carpels, simultaneous microsporogenesis, monosulcate pollen, and follicular fruits.