DescriptionThe family consists of tufted or rhizomatous, herbaceous plants belonging to a group of monocotyledons that includes several similar families, such as the Cyperaceae, sedges, Juncaceae, rushes, and Poaceae, grasses. They have green, photosynthetic stems and leaves that have been reduced to sheaths. Their flowers are extremely small and in spikelets, which in turn make up the inflorescences. Male and female flowers are on separate plants and, like grasses, are anemophilous, wind-pollinated.
DistributionPlants in the family are distributed on all the southern continents - South America (1 sp., ''Apodasmia chilensis''), Africa south of the Equator and including Madagascar (about 330 spp.) and Australia (about 150 spp.) - in New Zealand (four spp.) and widely distributed in Southeast Asia (one sp.). They are often dominant elements of the flora in the Mediterranean climates of South Africa and Western Australia. They are the defining family in the Western Cape fynbos plant community. The South American species is very similar to one of the New Zealand species, leading to the conjecture that it might have crossed the Pacific Ocean, Pacific in the last 30 million years. The distribution of restios in Africa is irregular, with the same single species occurring in Madagascar, the Democratic Republic of the Congo, Tanzania, and Malawi, while a different species is found in the Chimanimani National Park#Chimanimani mountains, Chimanimani Mountains of eastern Zimbabwe. Four species are found in the Drakensberg, Natal Drakensberg, one of which spills over into Mpumalanga and Limpopo provinces. The vast majority of species, though, are to be found in the Cape Floristic Region and particularly plentiful on hard sandstone formations. The center of diversity lies in the Kogelberg, where more than a third of all Restionaceae may be found.''Restios of the Fynbos'' - Els Dorrat Haaksma, H. Peter Linder (Botanical Society of South Africa, 2000) Restionaceae are grown in Kirstenbosch, Cape Town's National Botanical Gardens. A number of the largest African species have become popular as garden ornamentals in many parts of the world, some being useful as accent plants similar to small species of bamboo, but with pendant stems of greater delicacy. Also, many smaller species offer a great variety of decorative features and deserve horticultural attention.
TaxonomyThe family Restionaceae has been recognized by most taxonomists. The APG II system of 2003 (unchanged from the APG system, 1998), recognizes this family and assigns it to the order Poales, in the clade commelinids of the monocots. The Cronquist system of 1981 also recognized this family and placed it in the order Restionales, in the subclass Commelinidae in class Liliopsida in division Magnoliophyta.
Genera, Kew's Plants of the World Online lists the following 48 genera in the family Restionaceae: