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RANUNCULUS

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Originally appearing in Volume V22, Page 897 of the 1911 Encyclopedia Britannica.
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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. Lingua, spearwort, and R. Flammula, lesser spearwort, grow in marshes, ditches and wet places. R. 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. 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. 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. 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. 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. The ranunculus requires a strong and moist See also:soil, with a See also:fourth of rotten dung. 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:brown, See also:carmine, and See also:white. The florists' varieties have been bred from the See also:Persian type, which is more delicate.

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.

End of Article: RANUNCULUS

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RAO, SIR DINKAR (1819–1896)