Polygonum spergulariiforme is a North American species of flowering plants in the buckwheat family known by the common name spurry knotweed or fall knotweed.
 It grows in western Canada (British Columbia and Saskatchewan) and the western United States (primarily Washington, Oregon, and northern and central California but with a few isolated populations in Idaho, Wyoming and Montana).
Polygonum douglasii is a species of flowering plant in the knotweed family known by the common name Douglas's knotweed.
 It is native to much of northern and western North America, where it can be found in many types of habitat, including disturbed areas.
 It has been found in Canada from British Columbia north to Yukon and east as far as Québec, and in the United States as far south as California, New Mexico, Iowa, and New York.
Polygonum parryi is a species of flowering plant in the knotweed family known by the common names Parry's knotweed and prickly knotweed.
 It is native to the western United States from Washington to California, where it grows in several types of moist, open habitat in mountainous and coastal areas.
Polygonum argyrocoleon, common names silver-sheath knotweed and Persian knotweed, is an Asian species of plants in the buckwheat family.
 It is native to Siberia, western China, Central Asia, and the Middle East.
 It has also become naturalized in parts of the United States, primarily the Southwest, and northwestern Mexico.
Polygonum marinense is a rare North American species of flowering plants in the buckwheat family known by the common name Marin knotweed.
 It is endemic to California, where it is known from just a few locations north and east of San Francisco Bay.
Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae.
 Plants of the genus are known commonly as knotweeds or smartweeds.
 It has a cosmopolitan distribution, with species occurring nearly worldwide.
 The genus was segregated from "Polygonum".
Polygonum californicum is a species of flowering plant in the buckwheat family known by the common name California knotweed.
 It is native to the west coast of the United States from Washington, Oregon, and northern and central California in the Coast Ranges and Sierra Nevada foothills as far south as Napa and Tulare Counties.
 It can be found in many types of open habitats.
Polygonum is a genus of about 220 species of flowering plant in the buckwheat and knotweed family Polygonaceae.
 Common names include knotweed, knotgrass, bistort, tearthumb, mile-a-minute, smartweed and several others.
 In the Middle English glossary of herbs "Alphita" ( 1400-1425), it was known as ars-smerte.
 There have been various opinions about how broadly the genus should be defined.
 For example, Buckwheat ("Fagopyrum esculentum") has sometimes been included in the genus as "Polygonum fagopyrum".
Polygonum polygaloides is a North American species of flowering plants in the buckwheat family known by the common names milkwort knotweed and polygala knotweed.
 It is native to much of western North America, where it can be found in many types of moist habitat.
 It is a variable species, usually divided into a number of subspecies.
Pachysandra is a genus of five species of evergreen perennials or subshrubs, belonging to the boxwood family Buxaceae.
 The species are native to eastern Asia and southeast North America, some reaching a height of 20 - , with only weakly woody stems.
 The leaves are alternate, leathery, with an entirely too coarsely toothed margin, and are typically 5 - long.
 The small uni-sexual blooms are greenish-white and produced in late spring or early summer.

Question: Both Pachysandra the evergreen perennials and Polygonum also known as knotweed are what types of these plants?
Answer: flowering plant