The Botany of Iceland - 01.12.1942, Page 111
THE TARAXACUM-FLORA OF ICELAND
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the shape of the leaves T. galeiferum is not unlike T. nematolobum, T. subhoþlites,
T. selenophoreum and T. triste, but cannot be confused with these species. The
two latter have large, dark, radiating heads, the former has female heads, large
fruits and whitish-margined outer bracts, and T. subhoþlites has long, somewhat
fusiform fruits.
It is no doubt introduced.
Habitat: Home-fields.
Localities: Skógar at Fnjóskadalur, 24.VII.1937, plentiful, fr., phot. N.
Geogr. Distr. : Only found in Iceland.
i. Vulgaria Dahlst.
Key.
a. Petioles pale. Outer bracts broad. Plant robust.
b. Outer bracts patent—somewhat recurved. Lobes remotely placed, deltoid, +
reflexed.
112. T. sublaeticolor Dahlst.
bb. Outer bracts appressed—somewhat patent. Lobes densely placed, with +
convex or strongly dentate base and + suddenly constricted, patent-upward
curved end.
113. T. tenebricans Dahlst.
aa. Petioles purple-coloured. Plant medium-sized.
b. Anthers without pollen. Lobes often + hamate.
114. T. duplidens Lindb. fil.
bb. Anthers with pollen.
c. Outer bracts rather dark-green, long and narrow, loosely patent. Leaves
greyish-green. Terminal lobe short. Anthers with plenty of pollen.
115. T. angustisquameum Dahlst.
cc. Outer bracts light-green, + recurved. Leaves dark-green. Terminal lobe,
especially on the inner leaves, long and broad. Anthers with but little
pollen.
116. T. myvatnense M.P.Chr.
112. Taraxacum sublaeticolor Dahlst.
H. Dahlstedt: Om ölands Taraxacum-flora. Arkiv f. bot., Bd. 19, Nr. 18,
1925, p. 17.—Exsicc.: H. Dahlstedt: Taraxaca scandinavica exsiccata. Fasc. III,
Nr. 26.—M.P.Chr.: Plate X, fig. 112.
No doubt introduced.
Habitat: Gardens, home-fields.
Localities: Vestmannaeyjar, 5.VII.1935. S.—Reykjavík, 6.VII.1935, fr., 28.VI.
1937, Hafnarfjörður !, l.VII.1937. S.W.—Akranes !, 13.VII.1937. W,—tsafjörður,
12.VII.1935, l.VIII.1937. N.W.
Geogr. Distr.: Outside Iceland it occurs in Norway, Sweden, Denmark, Germany,
Finland, Esthonia, Russia, Lettland.
113. Taraxacum tenebricans Dahlst.
H. Dahlstedt: Om skandinaviska Taraxacum-former. Bot. Not. 1905.—Exsicc.:
H. Dahlst.: Taraxaca scandinavica exsiccata. Fasc. I, Nr. 20.—M.P.Chr. : Plate X,
fig. 113.
No doubt introduced.