Title: Biologisches Zentralblatt
Identifier: biologischeszent33rose (find matches)
Year: 1913 (1910s)
Authors: Rosenthal, I. (Isidor), 1836-1915
Subjects: Biology
Publisher: Leipzig (etc. ) VEB Georg Thieme (etc. )
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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Gates, Tetraploid Mutaiits and Chroniosomc Mechanisms. 123 less crinkled, being often nearly smooth (cf. fig. 4). 3) The margin of the stem leaves is much more conspicuously repand-dentate, often with jagged teeth near the base (see fig. 5). 4) In habit (cf. figs. 2 and 4), having the basal branches more spreading, and more numerous and longer stem-branches, which developed secondary
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Fig. 5. Upper row, three stem leaves from 0. gigas, Sweden. Lower row, three stem leaves from 0. gigas, Ttaly. branches later in the season. The plants were thus distinctly larger and more bushy than 0. gigas, lioXy. 5) The flovvers were decidedly larger, as shown in Table I. Long hairs on the bud cone were also more numerous and from larger papillae, the hairs themselves being also Ipnger, 6) An interesting constant difference was found in the capsules^^), which in gigas Italy were contracted at the extreme base, as in most of the related forms, while in gigas Sweden, they were usually expanded vertically to give a broad base of attachment reaching as much as 14.5 mm in one dimension. The capsules are also longer^*) than in the former, which is doubt- 23) Nilsson (1912), in bis recent paper gives (p. 133) a fuller account of the contrasting characters between these two giant types, but apparently has not observed this difference in the fruits. 24) The fact that this race is decidedly larger in stature, incliiding size of Sterns, leaves, flowers, ovaries aud capsules, may not be without significance. I

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