Geum

Geum
Geum coccineum
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Rosids
Order:	Rosales
Family:	Rosaceae
Subfamily:	Rosoideae
Genus:	Geum L.
Species
List of Geum species
Synonyms
Synonymy Acomastylis Greene Coluria R.Br. Erythrocoma Greene Neosieversia (incorrect spelling of Novosieversia) Novosieversia F.Bolle Oncostylus (Schltdl.) F.Bolle Oreogeum (Ser.) E.I.Golubk. Orthurus Juz. Parageum Nakai & H.Hara Sieversia Willd. Stylypus Raf. Taihangia T.T.Yu & C.L.Li Waldsteinia Willd.

Geum /ˈdʒiːəm/,^[1] commonly called avens, is a genus of about 50 species of rhizomatous perennial herbaceous plants in the rose family, widespread across Europe, Asia, North and South America, Africa, and New Zealand. They are closely related to Potentilla and Fragaria. From a basal rosette of leaves, they produce flowers on wiry stalks, in shades of white, red, yellow, and orange, in midsummer. Geum species are evergreen except where winter temperatures drop below 0 °F (−18 °C). The cultivars 'Lady Stratheden'^[2] and 'Mrs J. Bradshaw'^[3] have gained the Royal Horticultural Society's Award of Garden Merit.

Geum species are used as food plants by the larvae of some Lepidoptera species including the grizzled skipper.

Selected species

• Geum aleppicum – yellow avens or common avens^[4]
• Geum bulgaricum
• Geum calthifolium
• Geum canadense – white avens
• Geum × catlingii – Catlings avens
• Geum coccineum – dwarf orange avens
• Geum elatum
• Geum geniculatum – bent avens
• Geum heterocarpum
• Geum japonicum
• Geum laciniatum – rough avens
• Geum leiospermum
• Geum macrophyllum – largeleaf avens
• Geum molle
• Geum montanum – Alpine avens
• Geum parviflorum
• Geum peckii – mountain avens
• Geum pentapetalum
• Geum pyrenaicum
• Geum quellyon – scarlet avens or Chilean avens
• Geum radiatum – spreading avens, Appalachian avens, and cliff avens
• Geum reptans – creeping avens
• Geum rhodopeum
• Geum rivale – water avens or purple avens^[5]
• Geum rossii – Alpine avens
• Geum sikkimense
• Geum sylvaticum
• Geum talbotianum – Tasmanian snowrose
• Geum triflorum – prairie smoke or three-flowered avens^[6]
• Geum turbinatum
• Geum uniflorum
• Geum urbanum – wood avens or herb Bennet
• Geum vernum – spring avens
• Geum virginianum – cream avens or Virginia avens

For a more detailed list see List of Geum species.

Geum 'Beech House'

References

1. Sunset Western Garden Book, 1995:606–607
2. "RHS Plant selector". Retrieved 26 April 2013.
3. "RHS Plant selector". Retrieved 26 April 2013.
4. Dickinson, T.; Metsger, D.; Bull, J.; & Dickinson, R. (2004). The ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, p. 367.
5. Dickinson, T.; Metsger, D.; Bull, J.; & Dickinson, R. (2004). The ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, p. 368.
6. Dickinson, T.; Metsger, D.; Bull, J.; & Dickinson, R. (2004). The ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, p. 369.

External links

• "Geum L.". ITIS. Retrieved 2012-01-09.
• Jepson Manual Treatment, University of California
• Ontario Wildflowers: Avenses Group
• United States Department of Agriculture Plants Profile: North American Species
• Encyclopedia of Life