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RANUNCULUS , familiarly known as " See also:buttercup," or See also:crow-See also:foot, a characteristic type of the botanical See also:order See also:Ranunculaceae . The See also:Lat. name, which means a little See also:frog or See also:tadpole (dim. of rana, frog), was also given to a medicinal plant, which has been identified by some with the crowfoot . The Ranunculi are more or less acrid herbs, sometimes with fleshy See also:root-See also:fibres, or with the See also:base of the See also:stem dilated into a See also:kind of tuber (R. bulbosus) . They have tufted or alternate leaves, dilated into a sheath at the base, and very generally, but not universally, deeply divided above . The See also:flowers are solitary, or in loose cymes, and are remarkable for the number and distinctness (freedom from See also:union) of their parts . Thus there are five sepals, as many petals, and numerous spirally arranged stamens and carpels . The petals have a little See also:pit or See also:honey-gland at the base, which is interesting as foreshadowing the more fully See also:developed tubular petals of the nearly allied genera Aconilum and Hellebores . The See also:fruit is a See also:head of " achenes "—dry, one-seeded fruits . The genus contains a large number of See also:species (about 250) and occurs in most temperate countries in the See also:northern and See also:southern hemispheres, extending into See also:arctic and See also:antarctic regions, and appearing on the higher mountains in the tropics . About twenty species are natives of See also:Great See also:Britain . R. acris, R. repens, R. bulbosus, are the See also:common buttercups . R. arvensis, found in cornfields, has smaller See also:pale yellow flowers and the achenes covered with stout spines .
R
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Lingua, spearwort, and R
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Flammula, lesser spearwort, grow in marshes, ditches and wet places
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R
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Ficaria is the pilewort or lesser See also:celandine, an See also:early See also:spring See also:flower in pastures and See also:waste places, characterized by having See also:heart-shaped entire leaves and clusters of See also:club-shaped roots
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The See also:section Batrachium comprises the See also:water-buttercups, denizens of pools and streams, which vary greatly in the See also:character of the foliage according as it is submersed, floating or aerial, and when submersed varying in accordance with the See also:depth and strength of the current
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The ranunculus of the florist is a cultivated See also:form of R. asiaticus, a native of the See also:Levant, remarkable for the range of See also:colour of the flowers (yellow to purplish See also:black) and for the regularity with which the stamens and pistils are replaced by petals forming See also:double flowers
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R. asiaticus is one of the older florists' flowers, which has sported into numberless varieties, but was formerly held in much greater esteem than it is at the See also:present See also:time
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According to the canons of the florists, the flowers, to be perfect, should be of the form of two-thirds of a See also:ball, the outline forming a perfect circle, with the centre See also:close, the petals smooth-edged, the colour dense, and the marking See also:uniform
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The ranunculus requires a strong and moist See also:soil, with a See also:fourth of rotten dung
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The soil should be from 18 in. to 2 ft. deep, and at about 5 in. below the See also:surface there should be placed a stratum 6 or 8 in. thick of two-See also:year-old rotten cow-dung, mixed with See also:earth, the earth above this stratum, where the roots are to be placed, being
The See also:turban varieties, which are very showy for the See also:borders, are of a few See also:positive See also:colours, as See also:scarlet, yellow, See also: Other species known in gardens are R. aconitifolius (white See also:bachelor's buttons), with leaves recalling See also:aconite, and white flowers; the double-flowered form is known in gardens as See also:fair maids of See also:France or fair maids of See also:Kent . A double-flowered form of R. acris is grown under the name yellow bachelor's buttons . R. bulbosus also has a See also:pretty double-flowered variety . Of dwarfer interesting See also:plants there are R. alpestris, 4 in., white; R. gramineus, 6 to 10 in., yellow; R. parnassifolius, 6 in., white; and R. rutaefalius, 4 to 6 in., white with See also:orange centre . Of the taller kinds mention may be made of R. cortusaefolius, a See also:fine buttercup, 3–5 ft. high, from See also:Teneriffe, and See also:hardy in the mildest parts of Britain; and R. hyalli, known as the New See also:Zealand water See also:lily . It is a handsome species, 2 to 4 ft. high, with large peltate leaves often a foot in See also:diameter, and with waxy white flowers about 4 in. across . It is not quite hardy, and even under the best conditions is a difficult plant to grow well . |
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Ranunculus has ca. 600 species.
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