The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . Fig. Fig. 106. Fig. 105. /lo. 104.—Orate acute leaf of Coriara myrti/olia, one of the adulterations ofeenna. Besides the raidrlh there are two intra-margii:al ribs which convergete the apex. The leaf is therefore tricostate. Fio. 105.—Runclnate leaf of Dandelion (Leontodon Taraxacum). It Is a plnnatifidleaf, with the divisions pointing towards the petiole, l-io. 106.—Pinuatifld leaf of Valeriana dioica. If these divisions take place in a simple feathei-veinedleaf it becomes either pinnatijid (fig. 10
The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . Fig. Fig. 106. Fig. 105. /lo. 104.—Orate acute leaf of Coriara myrti/olia, one of the adulterations ofeenna. Besides the raidrlh there are two intra-margii:al ribs which convergete the apex. The leaf is therefore tricostate. Fio. 105.—Runclnate leaf of Dandelion (Leontodon Taraxacum). It Is a plnnatifidleaf, with the divisions pointing towards the petiole, l-io. 106.—Pinuatifld leaf of Valeriana dioica. If these divisions take place in a simple feathei-veinedleaf it becomes either pinnatijid (fig. 106), when thesegments extend to about the middle and are broad; orpectinate, when they are narrow; or pinnaiipartite, whenthe divisions extend nearly to the midrib. These primarydivisions may be again subdivided in a similar manner,and thus a, feather-veined leaf will become hipinnaiijid orbipinnatipartite ; and still further subdivisions give originto tripinnatifid and laciniated leaves. If the divisionsof a pinnatifid leaf are more or less triangular, and pointdownwards towards the base,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1902
