The Botany of Iceland - 01.12.1942, Page 104

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M. P. CHRISTIANSEN
Involucrum leviter turbinatum. Squamae exteriores laxe patentes—arcuatae, 3—4
mm latae, longae, lanceolatae, subtus obscure virides, pruinosae, apice atro-purpureo,
supra glaucescentes, leviter purpureae.
Calathium magnum, c. 60 mm latum, planum—convexum, radians, pure luteum
—sat obscure luteum. Ligulae marginales sat canaliculatae, 2.5—3.0 mm latae, c.
20 mm longae, subtus stria lucide purpurea—brunneo-purpurea notatae.
Antherae leviter polliniferae.
Stylus et stigmata virescentia.
Achenium fusco-stramineum (162—153), 3.6—3.8 mm longum, 1.3—1.5 mm
latum, superne dense, robuste patenti-spinulosum, ceterum squamuloso-tuberculatum
—laeve, in pyramidem sat cylindricam, 0.6—0.8 mm longam, basi 1—2-spinulosam
abiens. Rostrum 10—11 mm Iongum.
T. latidens has pale petioles, lanceolate, regularly lobed leaves, large heads, dark
purple-coloured stripe in the marginal ligulae and broad, robust, densely and coarsely
spinose fruits. It seems to be closely related to T. selenolobum. When cultivated the
two species, in a certain stage, were hardly to be distinguished from each other; in
the spring time, however, they are easely distinguishable, since the latter at that
time always has purple-spotted leaves.
Habitat: Hveragerði !, 2.VII.1937, Þingvellir, 30.VI.1937, plentiful, fr., phot.,
Hafnarfjörður, l.VII.1937, phot. S.W.—Stykkishólmur, 10.VII.1935, Flatey in
Breiðifjörður, 10.VII.1935. W,—Varmahlíð, 18.VII.1937. N.—Egilsstaðir, 18.VII.
1935. E.
Geogr. Distr.: Only found in Iceland.
104. Taraxacura acromaurum Dahlst.
H. Dahlstedt in Ostenfeld and Gröntved: The flora of Iceland and the Faeroes,
1934, p. 144.—M.P.Chr.: Plate IX, fig. 104.
T. acromaurum seems to be closely related to T. islandicum, but differs from
that species by its red fruits.
Habitat: Home-fields, medows.
Localities: Vestmannaeyjar, Heimaey, 6.VII.1904 (O. Paulsen), 5.VII.1935,
Húsadalur and Stóriendi ! in Þórsmörk, 8.VII.1937, Múlakot !, 3.VII.1937,
Bleiksárgljúfur !, 4.VII.1937, Breiðabólsstaður !, 9.VII.1937, Stórólfshvoll !, 9.VII.
1937. S.—Laugarvatn !, 5.VIII.1935, Þrastarlundur !, 10.VII.1937, Hveragerði !,
2.VII.1937, Þingvellir !, 7.VII.1937, Skáneyjarbunga in Reykholtsdalur, 28.VI.1936
(Omang), Reykir at Álafoss !, 29.VI.1937, Reykjavík, 8.VII.1905 (H. Jónsson),
6.VII.1935, 29.VI.1937, Hafnarfjörður !, 8.VII.1935, l.VII.1937, near Arbær,
2.VII.1936 (Omang), Elliðaá, 2.VII.1936 (Omang). S.W.—Akranes !, 13.VII.
1937, Svignaskarð !, 4.VIII.1935, Hreðavatn !, 14.VII.1937, Stykkishólmur !, 9.
VII.1935, Flatey in Breiðifjörður, 10.VII.1935. W,—Hagi, 15.VII.1935 (Helgi
Jónsson), Staður, 7.VI and 5.VII.1915 (Helgi Jónsson), Kumastaðir, 9,VII.1915
(Helgi Jónsson), Þingeyri !, 11.VII.1935, Flateyri ! in Önundarfjörður, l.VIII.1937,
ísafjörður, 12.VII.1935, l.VIII.1937. N.W.—Helgavatn, 16.VI.1889 (Stefán Ste-
fánsson), Reykir at Hrútafjörður !, 3.VIII.1935, Blönduós !, 2.VIII.1935, Varma-
hlíð ! and Víðimýri !, 17.VII.1937, fr., Bakkasel in Öxnadalur !, 21.VII.1937, Hof
in Hörgárdalur, 17.VII.1898 (Ólafur Davíðsson), Hofsárgil, 17.VIII.1902 (Ólafur
Davíðsson), Siglufjörður, 13.VII.1935, Grímsey, 1898 (Ólafur Davíðsson), Akureyri,
30.VII.1935, Nes !, Skógar ! and Vaglaskógur ! in Fnjóskadalur, 23.VII.1937,
Goðafoss !, 24.VII.1937, Laugar at Breiðamýri !, 27.VII.1935, Einarsstaðir !, 24.
VII.1937, Skútustaðir at Mývatn, 28.VII.1935, Reykjahlíð at Mývatn !, 29.VII.
1935, Námaskarð !, 25.VII.1937, Húsavik !, 22.VII.1935, Lón !, 23.VII.1935,
Lindabrekka, 26.VII.1935, Grímsstaðir !, 22.VII.1935, Möðrudalur !, 25.VII.1935.