The Botany of Iceland - 01.12.1942, Page 82
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M. P. CHRISTIANSEN
inferioribus denticulatis, lobo terminali parvo, hastato, supra medium valde contracto
et in apicem longum, acutum, abrupte protracto.
Invulucrum ellipsoideum, c. 19 mm longum, basi truncatum, olivaceo-viride, apice
piceo. Squamae exteriores patentes—laxe recurvatae, 6—2 X 11—14 mm, ovatae—
ovato-lanceolatae—lineares, subtus dilute—sat obscure olivaceo-virides, pruinosae,
leviter purpurascentes, supra laete virides—glaucescentes, + purpurascentes, interiores
sub apice + corniculatae.
Calathium 50—60 mm latum, planum, sat radians, sat obscure luteum. Ligulae
marginales c. 3 X 18 mm, subtus stria cano- vel croceo-purpurea notatae.
Antherae valde polliniferae.
Stigmata subvirescentia—atro-virescentia.
Achenium 3.3—3.6 mm longum, c. 1.2—1.3 mm latum, superne latiore, dense,
longe et acute, sat erecto- vel incurvo-spinulosum, ceterum squamuloso-tuberculatum,
in pyramidem cylindricam, 0.9—1.2 mm longam, inferne plerumque spinulosam
abiens. Rostrum 11—12 mm longum.
T. galeipotens has lanceolate, much lobed, dark-green, bright yellowish, very
hairy leaves, blotched with purple, brightly coloured petioles and midnerves, broad
outer bracts, coarsely spinous fruit with a long, cylindrical pyramid. In the shape
of the leaf it recalls. T. þardinum, the leaves of which are also much lobed, but
the latter species has pale petioles. See also T. atroglaucum.
Habitat: Home-fields, rock-ledges.
Localities: Vestmannaeyjar, 5.VII.1935, Múlakot, 3.VII.1937, Bleiksárgljúfur !,
4.VII.1937, Stórólfshvoll !, 9.VII.1937, Breiðabólsstaður, 9.VII.1937, fr., phot. S.
-—-Hveragerði !, 2.VII.1937, plentiful, Reykjavík, 8.VII.1935, Reykir at Álafoss !,
29.VI.1937, plentiful. S.W.—Akranes !, 13.VII.1937, Hreðavatn !, 13.VII.1937,
Flatey ! in Breiðifjörður, 10.VII.1935. W.—Bildudalur !, 11.VII.1935, ísafjörður !,