. Carnegie Institution of Washington publication. TAXONOMY—NYMPHAEA LOTUS. 195 base, cm. long by cm. wide. Fourth leaf ovate, cm. long by cm. wide, broadest and nearly truncate at base, tbe sides nearly parallel below, curving in above the middle to the rounded apex. Fifth leaf cordate-ovate, with rounded apex and lobes, cm. long by cm. wide, sinus cm. deep (cf. Lubbock 1892). The germinating tuber gives rise, all over its apical region, to a large number of slender stolons about cm. long and to cm. in diameter, with a lanc- eolate, acute, translu
. Carnegie Institution of Washington publication. TAXONOMY—NYMPHAEA LOTUS. 195 base, cm. long by cm. wide. Fourth leaf ovate, cm. long by cm. wide, broadest and nearly truncate at base, tbe sides nearly parallel below, curving in above the middle to the rounded apex. Fifth leaf cordate-ovate, with rounded apex and lobes, cm. long by cm. wide, sinus cm. deep (cf. Lubbock 1892). The germinating tuber gives rise, all over its apical region, to a large number of slender stolons about cm. long and to cm. in diameter, with a lanc- eolate, acute, translucent bract to cm. long on the basal portion, and an apical center of vegetation, from which about three submerged leaves are first formed, vary- ing greatly in size according to the supply of nourishment. The first leaf may have a petiole cm. long, bearing a filiform midrib cm. long with a minute protuber- ance on either side at base representing the lamina; or the lamina may be expanded as a linear terminal lobe with a shorter linear lobe on either side of the rounded. FIG. 74.—Early leaves of the Lotos group, from germinating tuber of N. devonieiisis Hort.: Is, lam- ina and stipules of first submerged leaf; Us, lamina, !, stipules, of second submerged leaf; 2/, 8/, second and third floating leaves. I,amime natural size. Stipules enlarged. base. The second submerged leaf is deltoid, with rounded angles and broad, shallow, rounded sinus. The third leaf is broadly deltoid, with deeper sinus. All three appear at first of a reddish color, later becoming green; their texture is very soft and thin, and margins entire. The first floating leaves vary much in size according to food- supply, but are entire, oval, deeply cordate, with rounded apex and lobes; length: breadth = : i (about) ; gradually leaves of a more circular outline are produced, and when practically round the dentation appears, at first very faintly, slowly reaching the adult form in the older lea
Size: 2095px × 1193px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1905
