The Botany of Iceland - 01.12.1942, Page 91

THE TARAXACUM-FLORA OF ICELAND
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T. triste has almost blackish-green leaves; + densely placed, acute, strongly den-
tate lobes; very dark, radiating heads, and narrow outer bracts. By the colour of
its leaves it is distinguishable from all other Icelandic Taraxaca. It seems to be
closely related to T. selenophoreum and may be confused with that species; it always
differs, however, by the darker colour of the leaves, more slender lobes and more
subulate-dentate and narrower outer bracts. Purple spots are absent, but as it recalls
the species of the group Naevosa in many characters, it is placed in that group.
It is no doubt spontaneous.
Habitat: Mó, meadows, rock-ledges, lava-fields.
Localities: Múlakot, 3.VII.1937, Bleiksárgljúfur, 4.VII.1937, Húsadalur and
Stóriendi in Þórsmörk, 8.VII.1937, Stórólfshvoll, 9.VII.1937, Breiðabólsstaður, 9.VII.
1937, Heiði near Breiðabólsstaður, 23.VII.1936 (Omang), Barkarstaðir, 18.VII.1911.
S.—Hveragerði, 2.VII.1937, Laugarvatn, 11.VII.1937, Þrastarlundur, 10.VII.1937,
Reykjavík, 6.VII.1935, fr., 29.VI.1937, Laugarna at Reykjavík, l.VII.1937, Hafnar-
fjörður, 8.VII.1935, l.VII.1937, Reykir at Alafoss, 29.VI.1937, Þingvellir, 30.VI.
1937, Fossvogur near Reykjavík, l.VII.1936 (Omang), Skerjafjörður near Skildinganes,
7.VII.1936 (Omang). S.W.—Akranes, 13.VII.1937, Hreðavatn, 14.VII.1937, Stykkis-
hólmur, 9.VII.1935. W.-—Bílðudalur, 11.VII.1935, ísafjörður, l.VIII.1937, Flateyri
in Önundarfjörður, l.VIII.1937. N.W.—Blönduós, 15.VII.1937, Varmahlíð, 20.VII.
1937, phot., Siglufjörður, 13.VII.1935, 30.VII.1937, Akureyri, l.VII.1935, 22.VII.
1937, Bakkasel, 21.VII.1937, Nes and Skógar in Fnjóskadalur, 23.VII.1937, Vagla-
skógur in Fnjóskadalur, 23.VII.1937, Goðafoss, 24.VII.1937, Reykjahlíð at Mývatn,
24.VII.1937, Laugar and Einarsstaðir at Breiðamýri, 26.VII.1937. N.
Geogr. Distr.: Only found in Iceland, but common there.
88. Taraxacum scabrum M.P.Chr. n. sp.
Spec. orig.: Iceland, Laugar at Breiðamýri, 27.VII.1937, leg. M. P. Christiansen.
Plate VII, fig. 88. Plate XXXVI, fig. 194.
Planta sat mediocris—magna 20—35 cm alta. Folia cano-viridia, dense sed
breviter araneosa, late lanceolata, sat profunde lobata, petiolis latis—sat angustis,
pallidis—paulo roseo-purpureis, nervo mediano leviter roseo, lobis approximatis—
leviter distantibus, brevibus, triangularibus—deltoideis, patulis, obtusis—acutiusculis,
antice rectis—convexulis, o—pauce denticulatis, margine inferiore fol. exteriorum
saepe convexo, lobo terminali brevi, obtuso—mucronato, galeato—triangulari-hastato,
interdum ovato, integro.
Scapi folia superantes, araneosi, colorati.
Involucrum basi sat turbinatum.
Squamae exteriores laxe reflexae, 3.5—2.0 X 11—14 mm, subtus laete olivaceo-
virides, supra laete virides, paulo purpurascentes.
Calathium c. 55 mm latum, dilute luteum, leviter radians, ligulae + canaliculatae,
marginales c. 2.8 X 2.0 mm, arcuatae, subtus stria cana—cano-violacea notatae.
Antherae parce polliniferae.
Stigmata virescentia, subtus obscura.
Achenium obscure brunneum—olivaceo-brunneum, (133—129), 2.6—3.0 mm
longum, 0.9—1.0 mm latum, in superiore parte dense et grosse erecto-spinulosuro,
ceterum + tuberculato-spinulosum vel laeve, in pyramidem 0.9—1.2 mm longam,
anguste cylindricam, basi sat spinulosam abiens. Rostrum 10—11 mm longum.
T. scabrum has greyish-green, very hairy, lanceolate-lingulate leaves with densely
placed, short and broad lobes, strongly patent outer bracts and small, very spinose
fruits with a long, narrow, + sphiose pyramid. Several of the characters of this
species are highly reminiscent of the species of the group Naevosa, it is therefore