The Botany of Iceland - 01.12.1942, Side 71
THE TARAXACUM-FLORA OF ICELAND
297
Achenium fusco-stramineum (162—153), c. 3.9 mm longum, c. 1.7 mm latum,
superne crebre, robuste et acute spinulosum, dentibus saepe hamatis, in pyramidem
sat sensim conicam, latam, c. 0.9 mm longam abiens. Rostrum 7—8 mm longum.
T. faeroenseforme seems to be closely related to 7. furvum, and the two species
are often difficult to distinguish from each other. The latter has leaves with strongly
convex lobes, which T. faeroenseforme has not; further it has far stronger colours
on the stripes of the marginal ligulae.—Both species were cultivated.
Habitat: Home-fields.
Localities: Siglufjörður, 13.VII.1935. N.
Geogr. Distr.: Found, outside Iceland, on the Faeroes: Thorshavn, 25.VI.1937,
fr., phot. and 16.VII.1923 (R. Rasmussen) cult. in hort. bot. Hafniense, 1925.
Suderö on rock-ledges at Kvanhauge, 26.VII.1897 (Hartz and C. H. Ostenfeld).
61. Taraxacum stictophyllum Dahlst.
H. Dahlstedt: Nordsvenska Taraxaca. Arkiv för bot. Bd. 12, Nr. 2, 1912, p. 38.
—De svenska arterna av slagtet Taraxacum VIII. Spectabilia, p. 57 with Text fig. 17
and Plate II, fig. 5 and Plate 4, fig. 3.—M.P.Chr.: Plate V, fig. 61.
Habitat: Home-fields, mountain-slopes, rock-ledges, birch-copses, ditches.
Localities: Hveragerði !, 2.VII.1937, plentiful, Þrastarlundur, 10.VII.1937,
Laugarvatn !, 11.VII.1937, Reykjavík, 6.VII.1935, Þingvellir, 7.VII.1935, fr. and
29.VII.1937, Reykir at Álafoss, 29.VI.1937, Hafnarfjörður !, l.VII.1937. S.W.—
Akureyri !, 22.VII.1937, Goðafoss !, 24.VII.1937, Reykjahlíð at Mývatn !, 24.VII.
1937, Laugar at Breiðamýri !, 26.VII.1937. N.
Geogr. Distr. : Found, outside Iceland, in Norway and on the Faeroes (Thors-
havn, 25.VI.1937).
Immaculala.
62. Taraxacum dilutiroseum M.P.Chr. n. sp.
Spec. orig. : Iceland, Þingvellir, 30.VI.1937, leg. M. P. Christiansen. Plate V,
fig. 62. Plate XXVIII, fig. 169.
Planta mediocris—sat alta. Folia cano-viridia, sat dense araneosa, late lanceolata
—lingulato-lanceolata, integra, robuste et irregulariter dentata—lobulata, petiolis
longis, angustis, laete—lucide roseis, nervo mediano dorso + roseo, lobis 2—3 utrin-
que, basi latis, antice fere nervo mediano parallelis, in apicem brevem, hamatum,
subulato-acuminatum abeuntibus, inferioribus denticulatis, lobo terminali magno,
ovato-sagittato, mucronato, marginibus convexis, lobulis lobis lateralibus similibus.
Involucrum basi turbinatum. Squamae exteriores adpressae— + patentes, 5.0
—2.5 mm latae, 7—10 mm longae, rotundato-ovatae—ovatae, in apicem brevem,
purpurascentem attenuatae, subtus obscure olivaceo-virides, + purpureo-marginatae,
supra virides et + laete purpurascentes. Squamae interiores dilute virides, apice
obscuro-purpureo.
Calathium c. 50 mm latum, densum—leviter radians, luteum—sat obscure luteum.
Ligulae leviter canaliculatae, marginales c. 20 X 2.8 mm, subtus stria paulo—dilute
rosea notatae, dentibus praesertim croceus.
Antherae polline carentes.
Stylus luteus. Stigmata luteo-virescentia, subtus sat obscura.
Achenium 4.6—5.0 mm longum, 1.4—1.5 mm latum, supeme minute, acute et
robuste erecto- vel patenti-spinulosum, ceterum parce tuberculatum—laeve, in
pyramidem conicam, 0.4—0.6 mm longam, basi sat spinulosam sensim abiens. Rostrum
c. 7 mm longum.