The Botany of Iceland - 01.12.1942, Page 84

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M. P. CIIRISTIANSEN
Achenium brunneum—rubro-brunneum, 3.3—3.6 mm longum, 1.1—1.3 mm
latum, superne longe erecto-spinulosum, ceterum tuberculatum— + laeve, in pyra-
midem 0.6—0.8 mm longam, cylindricam abiens. Rostrum 11—12 mm longum.
T. brevilobum is closely related to T. naevosum Dahlst. and has previously been
referred to this species, but it differs from it among other things by its dark, grey-
or bluish-green, firm, densely hairy leaves, the dark heads and the brown, slightly
reddish fruit with a distinctly cylindrical pyramid. The fruit of T. naevosum is
stated to have a + broad, conic pyramid. See also T. atroglaucum.
Habitat: Home-fields.
Localities: Vestmannaeyjar !, 4.VII.1935, Múlakot, 3.VII.1937, Bleiksárgljúfur !,
4.VII.1937, Stóriendi ! in Þórsmörk, 8.VII.1937, Stórólfshvoll ! and Breiðabóls-
staður, 9.VII.1937. S.—Hveragerði !, 2.VII.1937, Þrastarlundur !, 10.VII.1937,
Laugarvatn !, 11.VII.1937, Reykjavík, VII.1865 (Gronlund), 6.VII.1935, 29.VI.
1937, Reykir at Álafoss !, 29.VI.1937, Þingvellir, 30.VI.1937, Laugama at Reykja-
vík !, l.VII.1937, Hafnarfjörður, 8.VII.1935, l.VII.1937. S.W.—Akranes !, 13.
VII.1937, Hreðavatn !, 13.VII.1937, Stykkishólmur, 10.VII.1935. W.—Patreks-
fjörður, 11.VII.1935, ísafjörður !, 12.VII.1935, l.VIII.1937, Flateyri in önundar-
fjörður !, l.VIII.1937. N.W.—Blönduós !, 15.VII.1937, Víðimýri !, 20.VII.1937,
Bakkasel !, 21.VII.1937, Nes and Skógar ! in Fnjóskadalur, 22.VII.1937, Reykjahlíð
at Mývatn !, 24.VII.1937, Laugar at Breiðamýri !, 26.VII.1937, Goðafoss !, 24.
VII.1937, Lindabrekka, 16.VII.1935, fr. N.—Egilsstaðir !, 18.VII.1935. E.—Com-
mon and plentiful in Iceland.
78. Taraxacum naevosum Dahlst.
H. Dahlstedt in C. H. Ostenfeld: Additions and correctiones to the list of the
Phanerogamae and Pteridophyta of the Faeroes. Bot. of the Faeroes, vol. III, 1908,
p. 840. (Separate copies issued Nov. 1907).—De svenska arterna av slágtet Taraxa-
cum, VIII, Spectabilia, 1930, p. 50.—Ostenfeld and Gröntved: The flora of Iceland
and the Faeroes, 1934, p. 145.—Exsicc.: H. Dahlstedt, Taraxaca scandinavica ex-
siccata, Fasc. III, Nr. 5 and 7 (1913). M.P.Chr. : Plate VII, fig. 78.
Habitat: Home-fields.
Localities: Reykjavík, 6.VII.1935. S.W.—ísafjörður, 12.VII.1935. N.W.
Geogr. Distr.: Found, outside Iceland, in Sweden, Norway, Greenland, England,
Scotland, on the Faeroes, and in the Orkney- and Shetland-islands.
79. Taraxacum asperuin M.P.Chr. n. sp.
Spec. orig.: Iceland, ísafjörður, l.VIII.1937, leg. M. P. Christiansen. Plate VII,
fig. 79. Plate XXXII, fig. 181 and 182.
Planta robusta, 20—35 cm alta. Folia cano-viridia, sat dense purpureo-maculata,
breviter araneosa, lingulato-lanceolata, sat profunde lobata, petiolis latis, pallidis—
supra + purpureis, nervo mediano + praesertim ad marginem purpureo, lobis 6—7
utrinque, approximatis—sat distantibus, sat latis, subbrevibus, deltoideis—triangulari-
bus vel in apicem patentem vel porrectum, acutum, sat abrupte abeuntibus, superioribus
antice ad basin sat convexis, integris vel uni- et grosse dentatis, inferioribus margine
superiore + concavis et denticulatis, lobo terminali brevi, late hastato vel galeato,
mucronato, integro.
Involucrum basi sat turbinatum. Squamae exteriores laxe patentes—subrecurvatae,
2.0—3.5 X 10—12 mm, lanceolatae—lineares, obtusae, subtus sat obscure olivaceo-
virides, supra glaucescentes, apice leviter colorato.
Calathium 50—60 mm latum, saturate luteum, radians. Ligulae marginales c.