The Botany of Iceland - 01.12.1942, Qupperneq 107
THE TARAXACUM-FLOKA OF ICELAND
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Achenium sat fusco-stramineum (162—153), 3—3.2 mm longum, 1.2—1.4 mm
latum, superne dense, robuste erecto- vel patenti-spinulosum, ceterum ,-f- laeve, in
pyramidem 0.7—1.0 mm longam, conico-cylindricam abiens. Rostrum 9—11 mm
longum.
T. brachylobum has shining purple-coloured petioles, short triangular lobes,
large heads with plenty of pollen, and broad, coarsely spinous fruits, -f- long
cylindrical pyramids.-—The species can hardly be confused with other Icelandic
species.
It seems to be spontaneous.
Habitat: Wet grassy mountain-slopes, rock-ledges.
Localities: Varmahlíð, 18.VII.1937, plentiful, fr., phot. N.
Geogr. Distr.: Only found in Iceland.
106. Taraxacum melanocephalum M.P.Chr. n. sp.
Spec. orig.: Iceland, Bleiksárgljúfur, 4.VII.1937, leg. M. P. Christiansen. Plate
IX, fig. 106. Plate XXXXIV, fig. 216.
Planta sat robusta. Folia sat lucide et laete lutescenti-viridia, leviter et breviter
araneosa, interdum parce crispa, lingulato-lanceolata, sat parum lobata, petiolis
angustis, + lucide roseo-purpureis, nervo mediano pallido—leviter brunnescenti, lobis
3—5 utrinque, + approximatis, brevibus, latis, deltoideis vel interdum contractis
et in apicem abrupte abeuntibus, patulis, breviter acutis, integris—parce dentatis,
antice sigmoideo-concavis, lobo terminali brevi, triangulari- vel cordato-hastato, saepe
galeato, mucronato, integro vel uno latere dentato.
Involucrum sat truncatum. Squamae exteriores + patentes, superiores suberectae,
inferiores reflexae, 5—2 X 11—14 mm, ovato-lanceolatae—lineares, subtus atro-
vel olivaceo-virides, + obscure purpureae, supra virides, margine praesertim + pur-
pureae, interiores atro-virides, apice atro-purpureo.
Antherae polline carentes vel polliniferae.
Stigmata atro-virescentia.
Achenium sat fusco- vel olivaceo-brunneum, sat fusiforme, c. 4.2 mm longum,
c. 1.2 mm latum, superiore parte sat laxe et remote spinuloso-tuberculatum vel
squamulosum, ceterum laeve, in pyramidem 0.6—0.7 mm longam, conicam abiens.
Rostrum 11-—-12.5 mm longum.
T. melanocephalum has bright, yellowish-green, shallow-lobed leaves, short, often
galeate terminal lobes, shining red petioles, but + pale midnerves; very dark, +
purple-coloured outer bracts, and remotely spinous fruit with a conic pyramid. It
seems to be closely related to T. luxurians; the latter, however, is easily distinguished
by its large and broad, ovoid, at the summit rounded, + coarsely dentate terminal
lobe.
Habitat: Rock-ledges.
Localities: Bleiksárgljúfur, 4.VII.1937, fr., phot. S.
Geogr. Distr.: Only found in Iceland.
107. Taraxacum longispinulosum M.P.Chr. n. sp.
Spec. orig. : Iceland, Patreksfjörður, 11.VII.1935, leg. M. P. Christiansen. Plate
IX, fig. 107. Plate XXXXIII, fig. 214.
Planta mediocris, 20—-35 cm alta. Folia dilute lutescenti- vel canescenti-viridia,
sat dense araneosa, anguste lanceolata—lingulato-lanceolata, sat profunde lobata,
petiolis latis, pallidis—roseis, nervo mediano roseo—brunnescenti, lobis 3—4 utrinque,
sat distantibus, saepe basin versus latis et convexis in apicem brevem, acutum, in-