. Critical researches on the potamogetons. 236 ,T. 0. HAGSTROM, CRITICAL RESEARCHES ON THE Fig. 110. A —C, P. liicens 1j. J, Leaf-margin, showing the denticulation and the sinns between two denticles, enlarged, li, Transverse section of part of the ligale at the base, -y'*, showing the structure and the height of the ridge in relation to the thickness of the intercarinal part, ic, F, and G, corresponding parts of P. grainineus X Incens {P. Zizil M. K.) and P. gramhlens L. to show the intermediate position of the former. C, Pistil, a, side-view, b, stigma from above, \^. D —E, P.
. Critical researches on the potamogetons. 236 ,T. 0. HAGSTROM, CRITICAL RESEARCHES ON THE Fig. 110. A —C, P. liicens 1j. J, Leaf-margin, showing the denticulation and the sinns between two denticles, enlarged, li, Transverse section of part of the ligale at the base, -y'*, showing the structure and the height of the ridge in relation to the thickness of the intercarinal part, ic, F, and G, corresponding parts of P. grainineus X Incens {P. Zizil M. K.) and P. gramhlens L. to show the intermediate position of the former. C, Pistil, a, side-view, b, stigma from above, \^. D —E, P. lucens L. v. longifolius DC. Z>, Basal and apical part of a stem-leaf, -|. E, Basal and apical part of a branch-leaf, -J-. F, P. graminetis X Incens (P. Ziz'tl M. K.), transverse section of ligule, as in B, \°. G—H, P. gyamineiis L. 6', Transv. sect, of ligule. as in B, '/'• I'lie dotted line indicates the height of the ridge at the involucral leaves. //, Leaf-margin, showing the denticulation, enlarged. LoEW, ScHROTER, Lebensgesch., 1906, 450, f. 254: hybernating forms. — Fontell, Beitrage etc. 1909, t. Ill, f. 80—83, t. IV, f. 90-91: anatomical pictures of stem, rhizome etc. Distribution. Sweden, Scania and through the whole country (hb. Stockholm., Uppsal., Lund., Gothbg.) as far as Helsingland, Jerfso, Kalfsjon, 89, ScHLYTER (hb. Uppsal.), Medelpad (the valley of the Ljungan and the Giman) Borgsjon, 04, RiNGius (hb. Lund.), Torpsjon, 60, C. Rn (hb. Uppsal.), f. insignis, Stodesjon, 05, Collinder, Mellansjon, 10, Nord- strom, and East Jemtland, Holmsjon, 84, Tiselius (hb. Stockholm.), Hallesjo, Hasjo, 64, Tiselius (hb. Stockholm., Uppsal., Lund.) and Hasjo—Ragunda: Mill-lake, 86, Sundberg, the most northern station of Sweden, ca. 63° n. lat. with a year-isotherm of about + 3° C. Consequently it is not observed in Western Jemtland, Herjedalia, Western Helsingland, West and North Dalarne and Wermland. Norivay, Hsersoen, Blytt (hb. Uppsal.), Asker, Hogstadt
Size: 1038px × 2406px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1910, bookyear1916
