Cannomois is a genus of rush-like flowering plants in the family Restionaceae (restios), order Poales, within the monocot clade commelinids. Described as a genus in 1828 by P.Beauv. ex Desv., its type species is Cannomois cephalotes. Like all restios, Cannomois species are tufted or rhizomatous herbaceous plants with persistent green, photosynthetic stems and leaves reduced to sheaths. Their flowers are extremely small, borne in spikelets, and plants are dioecious with separate male and female individuals, pollinated by wind. The genus is entirely endemic to the Cape Floristic Region of South Africa, where the Restionaceae form the defining element of fynbos vegetation. The center of restio diversity lies in the Kogelberg area. Among the roughly 12 accepted species in the genus, Cannomois grandis has gained the Royal Horticultural Society's Award of Garden Merit, and several African restio species are cultivated worldwide as ornamental accent plants valued for their bamboo-like form with gracefully pendant stems.
Etymology
The common name "Fountainreeds" is recorded on iNaturalist. The genus name Cannomois was established by P.Beauv. ex Desv. in 1828; the specific etymology is not recorded in the available sources.
Distribution
Cannomois is entirely endemic to the Cape Provinces (now the Western and Northern Cape) of South Africa. The genus occurs within the Cape Floristic Region, where the Restionaceae family is the defining vegetative element of fynbos — the fire-adapted shrubland vegetation unique to this Mediterranean-climate region. The Kogelberg area, within this range, is the global center of restio diversity.
Ecology
Cannomois species grow in fynbos, the Mediterranean-climate shrubland of the Western Cape where Restionaceae are the defining plant family. They occur on the nutrient-poor, sandy soils of the Cape Fold Belt, particularly on sandstone formations. Like all restios, Cannomois is adapted to the fynbos fire regime and seasonal drought, with persistent evergreen photosynthetic stems that continue growing after fires from underground rhizomes.
Cultivation
Several large African restio species have become popular ornamental plants internationally. Cannomois grandis specifically has been awarded the Royal Horticultural Society's Award of Garden Merit, recognising it as a reliable garden plant. Restios in cultivation are valued as architectural accent plants, similar in effect to small bamboos but with pendent stems of greater delicacy. They require well-drained, acidic, sandy soils and full sun, reflecting their fynbos origins, and are typically suited to Mediterranean-climate gardens.
Taxonomy
The genus Cannomois was described in 1828 by P.Beauv. ex Desv. with Cannomois cephalotes Desv. as the type species. Two synonyms are recognised: Cucullifera Nees and Mesanthus Nees. GBIF records 14 descendant species within the genus; Wikipedia lists 12 accepted species, all described by authorities including H.P. Linder, Masters, Pillans, and Steudel. The genus belongs to family Restionaceae, order Poales, within the commelinid clade of monocots (APG IV).
