Harrisia (plant)
Harrisia is a genus of night blooming cacti.
Description
They are tree-shaped, sometimes climbing or shrub-like cacti with cylindrical shoots. They reach heights of up to 7 m. The shoots are ribbed and do not form aerial roots. The flowers open at night, are white and up to 12 cm in diameter. After successful pollination, rounded fruits are formed, which are red to orange in color. The fruits have scales with areoles in the axils. The black seeds are 2 to 3 × 1.5 mm in size.Distribution
Plants are native to Argentina, Paraguay, Brazil, Bolivia, Uruguay, the Greater Antilles, the Bahamas, and the U.S. state of Florida. The genus is named after William Harris, an important botanist of Jamaica. There are about 20 species.Harrisia cactus is an exotic invasive in Australia in Queensland and New South Wales, in Africa, and in the U.S. state of Hawaii.
Taxonomy
The genus was established by Nathaniel Lord Britton in 1909.Species
, Plants of the World Online accepted the following species separated into two subgenera:| Subgenus | Image | Scientific name | Distribution |
| Eriocereus A.R. Franck | Harrisia tetracantha D.R.Hunt | Bolivia. | |
| Eriocereus A.R. Franck | Harrisia regelii Borg | Argentina to Uruguay. | |
| Eriocereus A.R. Franck | Harrisia martinii Britton | E. Paraguay to NE. Argentina. | |
| Eriocereus A.R. Franck | Harrisia bonplandii Britton & Rose | Paraguay, Argentina, Bolivia | |
| Eriocereus A.R. Franck | Harrisia pomanensis Britton & Rose | Argentina, Bolivia, Paraguay | |
| Eriocereus A.R. Franck | Harrisia tortuosa Britton & Rose | Bolivia to Uruguay. | |
| Harrisia | Harrisia aboriginum Small ex Britton & Rose | Florida, on the Gulf Coast of the counties of Lee, Sarasota County, and Charlotte | |
| Harrisia | Harrisia adscendens Britton & Rose | Brazil | |
| Harrisia | Harrisia brookii Britton | Bahamas. | |
| Harrisia | Harrisia caymanensis A.R.Franck | Cayman Islands, Swan Islands. | |
| Harrisia | Harrisia divaricata Backeb. | Hispaniola. | |
| Harrisia | Harrisia earlei Britton & Rose | Cuba | |
| Harrisia | Harrisia eriophora Britton | Cuba. | |
| Harrisia | Harrisia fernowii Britton | Cuba. | |
| Harrisia | Harrisia fragrans Small ex Britton & Rose | St. Lucie County, Florida | |
| Harrisia | Harrisia gracilis Britton | Jamaica | |
| Harrisia | Harrisia portoricensis Britton | Puerto Rico | |
| Harrisia | Harrisia taetra Areces | Cuba. |