Plants — 23,508 Species

Prostrate Knotweed

Polygonum aviculare L.

Polygonum aviculare L., common knotgrass, is a widespread invasive annual herb native to Eurasia that hosts many insect species.

Horsetail Knotgrass

Polygonum equisetiforme Sm.

beach knotweed

Polygonum paronychia Cham. & Schltdl.

Polygonum paronychia Cham. & Schltdl. is a small shrub, and its poultice treats whitlow infections.

Small Knotweed

Polygonum plebeium R.Br.

Polygonum plebeium is a flowering knotweed species native to Australia, Africa, and Asia, sometimes eaten as a vegetable.

bushy knotweed

Polygonum ramosissimum Michx.

Polygonum ramosissimum is a morphologically variable plant with specific conservation statuses across several US states.

slender bindweed

Polymeria calycina R.Br.

Slender bindweed (Polymeria calycina) is a prostrate herbaceous vine native to northern and eastern Australia.

leafcup

Polymnia canadensis L.

Polymnia canadensis, commonly bears foot or small-flowered leafcup, is a perennial flowering plant with distinct leaf shape variation.

veined bristle-fern

Polyphlebium venosum (R.Br.) Copel.

Polyphlebium venosum is a small delicate fern restricted to wet Australian and New Zealand forests, often growing on Dicksonia antarctica.

irregular polypody

Polypodium amorphum Suksd.

Polypodium amorphum is a small fern native to the North American Pacific Northwest, that grows in moist mountain rock crevices.

Appalachian rockcap fern

Polypodium appalachianum Haufler & Windham

Polypodium appalachianum is a diploid fern native to eastern North America, first named in 1991 as a separate cryptic species.

California Polypody

Polypodium californicum Kaulf.

Polypodium californicum Kaulf. is a fern with scaly rhizomes, segmented leaves, and spore-bearing sori on leaf undersides.

southern polypody

Polypodium cambricum L.

Polypodium cambricum L. is a perennial fern with two Award of Garden Merit winning cultivars.

licorice fern

Polypodium glycyrrhiza D.C.Eaton

Polypodium glycyrrhiza, the licorice fern, is a sweet-flavored North American fern cultivated ornamentally and used by Indigenous groups.

western polypody

Polypodium hesperium Maxon

Polypodium hesperium Maxon is a fern with scaly rhizomes, oblong segmented leaves, and spore-bearing sori on leaf undersides.

intermediate polypody

Polypodium interjectum Shivas

Polypodium interjectum Shivas is a medium ladder-like European fern that grows in partial mild basic to slightly acidic habitats.

ʻAe lau nui

Polypodium pellucidum Kaulf.

Polypodium pellucidum Kaulf. is a Hawaiian fern that grows in cracks and colonizes new lava flows early.

leathery polypody

Polypodium scouleri Hook. & Grev.

Polypodium scouleri is a coastal North American fern with common names including leathery polypody and Scouler's polypody.

rock polypody

Polypodium virginianum L.

Polypodium virginianum is a small rhizomatous evergreen fern common in rocky habitats across eastern North America.

common polypody

Polypodium vulgare L.

Common polypody (Polypodium vulgare L.) is an adaptable evergreen fern with culinary and herbal medicinal uses.

rabbitfoot grass

Polypogon monspeliensis (L.) Desf.

Polypogon monspeliensis is an Old World native annual grass, now a widespread introduced species that is sometimes a noxious weed.

water beard grass

Polypogon viridis (Gouan) Breistr.

Polypogon viridis is a perennial true grass species native to parts of Eurasia, Africa, and Macaronesia. It is an established neophyte in the UK.

Rust Weed

Polypremum procumbens L.

Polypremum procumbens, the only species in genus Polypremum, is a low-growing herb with common names juniperleaf and rustweed.

celery wood

Polyscias elegans (C.Moore & F.Muell.) Harms

Polyscias elegans is a fast-growing Australian tree whose fruit is eaten by many bird species.

Elderberry Panax

Polyscias sambucifolia (DC.) Harms

Polyscias sambucifolia, or elderberry panax, is an Australian rainforest-edge plant with attractive foliage and fruit.