PlantaeDB Logo
Login Sign-up

Genus Geum in Family Rosaceae

In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.

Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.

Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).

Do you wish to read more about plant taxonomy? Click here!

Genus Description

Suggest a correction!

Geum (L.) is a genus of perennial herbs in Rosaceae (subfamily Rosoideae, tribe Colurieae) with an estimated 50–60 accepted species worldwide. Its distribution is primarily temperate throughout Eurasia, North America, and parts of the Himalayas, extending into subalpine and boreal habitats. The type species is Geum urbanum (Harley, 1975). The plants are low-growing with basal rosettes of pinnate to lyrate leaves bearing conspicuous stipules that fuse to the petiole and often persist on the rhizome. Aerial stems are erect and typically bear a few cauline leaves. Inflorescences are solitary or lax cymes with five yellow, orange, or white petals that are broadly obovate and show a characteristic claw at the base. The sepals are five, with five small epicalyx segments alternating with them. Ovaries are superior and apocarpous, each carpel with a long, persistent style that often hooks at the tip; fruits are clusters of achenes with plumose styles that aid in wind dispersal. The genus is keyed by its stoloniferous to rhizomatous habit, non-dehiscent achenes with hooked or plumose styles, and the presence of paired stipules fused to the petiole (Röth et al., 2022; Goon, 2016).

Diversity and range centers in temperate Asia, the Himalayas, and the northern hemisphere, with notable regional endemics. Species commonly occur from lowland grasslands and river margins to alpine meadows above 3000 m, favoring moist, nutrient-rich soils and cool, seasonal climates. North America hosts several widespread species, while the European flora is more modest in species number but ecologically prominent (Goon, 2016; Röth et al., 2022).

Pollination is primarily entomophilous, especially by bees and flies, and seed dispersal is anemochorous by the plumose styles; vegetatively, many species spread by short rhizomes or runners (Goon, 2016). Base chromosome numbers of x = 9 (reported for G. urbanum) and x = 10 (reported for G. reptans) have been recorded, underscoring polyploid variation within the genus (Punk, 1975; Röth et al., 2022).

Taxonomically, the genus has long been linked to Coluria, and some treatments merge the two. Segregate genera such as Oreogeum and Parageum have been recognized, but recent phylogenetic work demonstrates that these lineages fall within Geum, and a broad circumscription that includes them has been widely adopted. Hence, Geum in its current usage subsumes several historically separate genera, with minor fluctuation in species rank and synonymy depending on checklist interpretations (Röth et al., 2022; WFO, 2024; POWO, 2024). Several alpine and Asian taxa remain under active review, reflecting regional complexity rather than unresolved deep conflict.

Geum is prominent in horticulture for rock gardens and alpine plantings; G. urbanum has minor cultural uses as a flavoring and flavoring adjunct in traditional contexts. It is not a major timber genus, but G. rivale and allied taxa are valued ornamental streamside plants. Although widely naturalized, few species are considered invasive. Conservation concerns largely focus on local habitat loss and climate-driven shifts in alpine environments, highlighting the need for continued monitoring of mountain and meadow populations (Goon, 2016; Röth et al., 2022).

Pick a Species to see its components: