Edit Plant: Potentilla

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'''''Potentilla''''' is a [[genus]] of about 500 species of [[Annual plant|annual]], [[Biennial plant|biennial]] and [[Perennial plant|perennial]] [[herbaceous|herb]]s in the rose family [[Rosaceae]], native to most of the [[Northern Hemisphere]]. Common names include '''cinquefoil''', '''tormentil''', and '''barren strawberry'''. Many of the species have leaves divided into five leaflets arranged palmately (like the fingers of a hand), whence the name cinquefoil (French, ''cinque feuilles'', "five leaves"), though some species (e.g. ''P. sterilis'') have just three leaflets, and others (e.g. ''P. anserina'') up to 15 or more leaflets arranged pinnately. The leaves of some cinquefoils are eaten by the [[larva]]e of some [[Lepidoptera]] species - see [[list of Lepidoptera which feed on Potentilla]]. Recent [[genetics|genetic]] research has resulted in a number of changes to the circumscription of ''Potentilla'' (Eriksson et al., 2003). The genera ''Duchesnea'', ''Horkelia'', and ''Ivesia'', previously all regarded as distinct, have been shown to be members of ''Potentilla'', though this change has not been universally adopted. Conversely, the shrubby plant previously included in this genus as ''Potentilla fruticosa'', does not to belong to ''Potentilla'' at all, and is now treated in the genus ''[[Dasiphora]]'' as ''Dasiphora fruticosa''. The two species formerly treated as ''Potentilla palustris'' and ''Potentilla salesowianum'' are now separated into the genus ''[[Comarum]]'', while ''Potentilla tridentata'' is transferred to ''[[Sibbaldiopsis]]'' as ''Sibbaldiopsis tridentata'', and ''Potentilla arguta'' is similarly now separated into the genus ''[[Drymocallis]]'' as ''Drymocallis arguta''. The [[silverweed]]s are also separable into the new genus ''[[Argentina (plant)|Argentina]]'', though these are closer to the typical species of ''Potentilla'', and this separation is less well supported. ''Potentilla'' is also related to the genera ''[[Geum]]'' and ''[[Dryas (plant)|Dryas]]'', and also to the strawberries in the genus [[strawberry|''Fragaria'']]; ''Potentilla'' differs from the strawberries in having dry, inedible fruit (hence the name "barren strawberry" for some species). Some species are grown as garden plants. {{Inc| Potentilla (diminutive of Latin potens, powerful; referring to the medicinal properties). Rosaceae. Cinquefoil. Five-finger. A large group of perennial, rarely annual, herbs and shrubs found throughout the North Temperate and frigid zones; somewhat planted. Leaves compound: appendages of the calyx 5, borne at the base of the 5 sepals, which in turn are borne upon the edge of a cup-shaped, dry receptacle; stamens 10-30, together with the 5 rounded petals inserted upon the margin of the receptacle (perigynous) ; pistils many, in fr. becoming minute achenes; style deciduous. Those in cultivation are all hardy perennial plants suitable for border planting. The most valuable dou- ble-fld. forms are hybrids. Monograph by T. Wolf, Bibliot. Bot. Heft 71:1908. The American potentillas are generally rather unattractive plants with small flowers. They are, as a rule, very tenacious of life and do well with ordinary care. P. fruticosa, a handsome and distinct low shrub, prefers moist positions, but will grow in even very dry soil. When thoroughly established in moist soil, it is difficult to eradicate. P. argentea should be given a dry soil, preferably about rocks. It is tenacious of life and is rather attractive. P. Hippiana, a western species with comparatively large foliage of decided gray color, is hardy East. It is a good perennial, preferring dryish soil. P. tridentata is an attractive evergreen species forming thick mats. It does well in any fairly rich soil in open or partially shaded positions. Potentillas are propagated by division or seed, the hybrids only by division. P. fruticosa may be increased by greenwood cuttings. (F. W. Barclay.) Hybrid potentillas (Fig. 3157) have nearly all the good qualities in a border plant, handsome foliage and free-blooming habit. They continue in bloom from spring until autumn, although most profusely in June and July. They cannot be said to be reliably hardy in the latitude of Boston, probably not above Washington. They do not grow over 2 feet and seldom need staking. A heavy soil suits them best. Choice varieties are propagated by division of the rootstock in spring: cuttings will not root. They run mostly in shades of maroon, scarlet, and orange, often beautifully banded with yellow. They bear seed freely, and when carefully hybridized one may get a very fine strain with a good proportion of double blooms. Seedlings bloom the second year. Some of the species make neat rock-plants, especially P. tridentata, P. verna. and P. argentea, the last, though common, is valuable in places in which other plants will not grow. (T. D. Hatfield.) Index alba, 9. formosa, 15. palustris. 3. albicans, 1 Friedricksenii, 1. pyrenaica, 25. alpestris, 27. fruticosa, 1. recta, 22. ambigua, 5. glandulosa, 12. rupestris, 10. Anserina, 31. Gordonii, 33. Salcsoviana, 2. argentea, 21. gracilis, 14. speciosa, 7. arguta, 11. grandiflora, 24. sulphurea, 22. argyrophylla, 18. haematochrus, 17. Thurberi, 10. atrosanguinea, 19. Hippiana, 13. Tongusi, 15. calabra, 21. insignis, 18. tridentata, 4. canadensis, 30. laciniata, 23. Veitchii, 1. cinerea, 29. laciniosa, 23. verna, 28. dahurica, 1. nepalensis, 15. villosa, 20. dubia, 26. nitida, 8. Vilmoriniana, 1. eriocarpa, 6. pacifica, 32. Following are some of the hybrid potentillas, the exact botanical status of which has not been worked out and which have not been standardized as to nomenclature: P. bicolor (P. argyrophylla X P. atrosanguinea, according to Wolf), orange and vermilion. P. cardinale (P. atrosaniguinea X P. nepalensis, according to Wolf), brilliant cardinal. Dr. Andre, golden yellow suffused with vermilion. Eldorado, purple suffused with yellow. Emile, bright bronay red. Gloire de Nancy, golden yellow. Hamlet, dark carmine. P. Hopwoodiana (P. nepalenais X P. recta, according to Wolf). Lfts. 5-6: petals at base deep rose, at center pale rose, margine whitish. P. hybrida, name applied to various hybrids. R.H. 1890, p. 305. Gn. 16:402; 25:514. Jeane Salter, orange, shaded scarlet. Le Vesuve, floriferous. light red margined with yellow or scarlet. P. Mac Nabiana (P. argyrophylla X P. atrosanguinea, according to Wolf). Mars, dark velvety red.M. Daudin, beautiful amber. O'Briana, pink and salmon. P. perfecta, maroon, shaded lemon. P. purpurea, deep purple. P. versicolor, carmine- and yellow- flaked.— Victor Lemoine, light red striped with yellow. W m. Rollinson, mahogany-brown, suffused with orange. The status of the following trade names cannot be determined: P. amaena, P. caucasicum, P. concolor, P. lanuginosa, P. minima, P.nessensis . P.splendens. K M Wiegand. Section I. Trichocarpae. Carpels completely or in part pilose (except P. palustris): receptacle long- and dense-pilose. Subsection A. Rhopalostylae . Style clavate. }} ==Cultivation== ===Propagation=== ===Pests and diseases=== ==Varieties== About 500, including:<br> *''[[Potentilla alba]]'' White Cinquefoil *''[[Potentilla alchemilloides]]'' Alchemilla-leaved Cinquefoil *''[[Potentilla anglica]]'' Trailing Tormentil *''[[Potentilla anserina]]'' Silverweed *''[[Potentilla argentea]]'' Hoary Cinquefoil *''[[Potentilla arguta]]'' Tall Cinquefoil *''[[Potentilla canadensis]]'' Canadian Cinquefoil *''[[Potentilla cinerea]]'' Grey Cinquefoil *''[[Potentilla crantzii]]'' Alpine Cinquefoil *''[[Potentilla erecta]]'' Common tormentil *''[[Potentilla fragarioides]]'' Cinquefoil *''[[Potentilla glandulosa]]'' Sticky Cinquefoil *''[[Potentilla hickmanii]]'' Hickman's potentilla *''[[Mock Strawberry|Potentilla indica]]'' Mock Strawberry *''[[Potentilla micrantha]]'' Pink Barren strawberry *''[[Potentilla norvegica]]'' Norwegian Cinquefoil *''[[Potentilla palustris]]'' Marsh Cinquefoil *''[[Potentilla pensylvanica]]'' Pennsylvania Cinquefoil *''[[Potentilla recta]]'' Sulphur Cinquefoil *''[[Potentilla reptans]]'' Creeping tormentil *''[[Potentilla rupestris]]'' Rock Cinquefoil *''[[Potentilla simplex]]'' Oldfield Cinquefoil *''[[Potentilla sterilis]]'' Barren Strawberry *''[[Potentilla tabernaemontani]]'' Spring Cinquefoil *''[[Potentilla Robbinsiana]]'' Robbins Cinquefoil Previously included species *''[[Potentilla fruticosa]]'' now reclassified as ''[[Dasipho ra fruticosa]]'' Shrubby Cinquefoil ==References== *{{wplink}} *Eriksson, T., Hibbs, M. S., Yoder, A. D. Delwiche, C. F. & Donoghue, M. J. (2003). The Phylogeny of Rosoideae. ''Int. J. Plant Sci.'' 164(2): 197–211. Available [http://research.yale.edu/yoderlab/pdfs/2003,%20Eriksson%20et%20al,%20IJPS.pdf online (pdf file)] __NOTOC__

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