The Botany of Iceland - 01.12.1942, Blaðsíða 69
THE TARAXACUM-FLORA OF ICELAND
295
It is no doubt spontaneous.
Habitat: Birch-copses.
Localities: Egilsstaðir, 18.VII.1935, fr., phot. E.
Geogr. Distr.: Only found in Iceland.
57. Taraxacum faeroénse Dahlst.
H. Dahlstedt: Taraxacum frán vástra Norge. Bergens Museums Aarbog 1921—24,
p. 12. Naturh. Række, Nr. 6.—T. palustre. Rostrup : Færoernes Flora, 1870, p. 51.—
T. croceum C. H. Ostenfeld : Bot. of the Faeroes, Vol. I, 1891 (non Dahlstedt).—
T. laevigatum C. H. Ostenfeld : Bot. Tidsskr., Bd. 22, 1898 (non DC).—T. specta-
bile Dahlst. var. faeroense Dahlst. et var. maculigerum Dahlst. (?). apud C. H.
Ostenfeld : Additions and corrections to the list of the Phanerogamae and Pteri-
dophyta of the Faeroes, Botany of the Færöes, Vol. III, 1908, p. 839.—Ostenfeld and
Gröntved: The Flora of Iceland and the Faeroes, 1934, p. 145.—Flora danica, Vol.
X, Fasc. XXIX, Tab. 1908, s.n. Leontodon palustre.—M.P.Chr.: Plate V, fig. 57.
T. faeroense is probably introduced.
Habitat: Home-fields.
Localities: Múlakot !, 3.VII.1937. S.—Hveragerði !, 2.VII.1937, Laugarna at
Reykjavík !, l.VII.1937, Reykir at Álafoss, 29.VI.1937. S.W.—Patreksfjörður, 11.
VII. 1935, fr., Flateyri in Önundarfjörður, l.VIII.1937. N.W.
Geogr. Distr.: Iceland, Norway, Sweden, the Faeroes.
58. Taraxacum vestmannicum M.P.Chr. n. sp.
Spec. orig.: Iceland, Vestmannaeyjar, 5.VII.1935, leg. M. P. Christiansen. Plate
V, fig. 58. Plate XXXII, fig, 180.
Planta robusta, 15—35 cm alta. Folia obscure cano-viridia, parce—sat dense
araneosa, interdum + purpureo-maculata, late lingulato-lanceolata, leviter undulata,
integra et dentata—parum lobata, petiolis sat latis—-angustis, + purpureis, nervo
mediano + purpureo, lobis 2—3 utrinque, latis, perbrevibus, saepe hamatis, acutis,
antice convexis, integris—parce denticulatis, lobo terminali mediocri—magno, ovato,
integro.
Scapi + obscure purpurei—brunnei.
Involucrum basi truncatum. Squamae exteriores adpressae—erecto-patentes, 4.0
—2.5 X 7—10 mm, late ovatae—lanceolatae, subtus obscure olivaceo-virides, +
brunneo-purpurascentes, anguste sed conspicue albido-marginatae, cum interiores
apice atro-purpureo.
Calathium c. 50 mm latum, planum, sat radians, obscure luteum—fere croceum.
Ligulae marginales c. 3 mm latae, subtus stria obscure brunneo-purpurea notatae.
Antherae polline carentes.
Stylus et stigmata virescentia.
Achenium fusco-stramineum (162—153), c. 4 mm longum, 1.4—1.5 mm latum,
saepe fere aequilatum, superne robuste et longe spinulosum, ceterum laeve vel leviter
tuberculatum, in pyramidem latam, |- conicam, 0.6—0.8 mm longam, inferne parce
spinulosam abiens. Rostrum 7—8 mm longum.
T. vestmannicum seems to be closely related to T. eximium Dahlst., but differs
from this species among other things by having fruits almost equally broad
throughout, and strongly spinose above. T. eximium has a tap-shaped fruit, the
summit of which is very broad and warty or finely spinose. A good mark of identifica-
tion for T. vestmannicum is the dark, small, but sharply white-marginated outcr
bracts.
The species is no doubt introduced.
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