The Botany of Iceland - 01.12.1942, Side 74
300
M. P. CHRISTIANSEN
T. cordatifrons has lingulate-lanceolate, regularly lobed leaves, densely placed,
acute lobes often with a strongly convex upper edge and short cordate to long ovoid-
sagittate terminal lobe, rather bright heads without pollen and a large, broad fruit
with coarse spines and a broad, conic pyramid. The species may be mistaken for
T. dilutiroseum, but the latter has a fusiform fruit, very broad, appressed outer
bracts, and more irregular leaves.
Habitat: Home-fields, birch-copses.
Localities: Laugarvatn, 11.VII.1937, Þingvellir, 7.VII.1935, phot., Reykjavík,
6.VII.1935, fr., S.W.—Akranes, 13.VII.1937. W.
Geogr. Distr.: Only found in Iceland.
67. Taraxacum subspectabile M.P.Chr. n. sp.
Spec. orig.: Iceland, Hreðavatn, 12.VII.1937, leg. M. P. Christiansen. Plate VI,
fig. 67 to the left. Plate XXXI, fig 179.
Planta mediocris, 20—30 cm alta. Folia sat obscure viridia, + araneosa, longa,
lingulato-lanceolata, leviter crispa, sat profunde lobata, petiolis longis, angustis, +
purpureis, nervo mediano + purpureo, lobis 2—4 utrinque, sat approximatis—sat
distantibus, basin versus latis et in apicem longum, + reflexum attenuatis, +
subulato-dentatis, lobo terminali longo, sagittato, acuto, margine + rotundato-
undulato.
Scapi folia aequantes, + brunnescentes.
Involucrum basi sat turbinatum. Squamae exteriores adpressae, latae, ovato-lan-
ceolatae, subtus laete olivaceo-virides, + purpureo-marginatae, supra laete virides,
+ purpureae.
Calathium c. 50 mm latum, planum, sat radians, dilute luteum. Ligulae mar-
ginales latae, subtus stria cano-rosea notatae.
Antherae polline carentes.
Stigmata lutea—subtus + obscura.
Achenium dilute stramineum, sat fusiforme, c. 4.5 mm longum, c. 1.4 mm latum,
superne breviter et minute spinulosum, ceterum parce tuberculatum—laeve, in
pyramidem c. 0.6 mm longam, late conicam sensim abiens. Rostrum c. 9 mm
longum.
T. subsþectabile has lingulate—lanceolate leaves with rather long, reflexed and
acuminate lobes, bright, female heads, appressed, ovoid outer bracts, and large,
straw-coloured, somewhat fusiform, finely spinous or warty fruit with a short
pyramid. The species seems to be closely related to T. spectabile Dahlst. and similar
species.
Habitat: Home-fields.
Localities: Laugarna at Reykjavík, 30.VI.1937. S.W.—Hreðavatn, 12.VII.1937,
plentiful, fr., phot., Stykkishólmur, 10.VII.1935. W.—Flateyri in Önundarfjörður,
l.VIII.1937. N.W.—Siglufjörður, 14.VII.1935. N.
Geogr. Distr. : Only found in Iceland.
68. Taraxacum leptolepis M.P.Chr. n. sp.
Spec. orig.: The Faeroes, Thorshavn, 25.VI.1937, leg. M. P. Christiansen. Plate
VI, fig. 67 to the right and fig. 68. Plate XXIX, fig. 172.
Planta mediocris. Folia obscure cano-viridia, dense araneosa, lingulata, petiolis
angustis, rubescentibus, nervo mediano rubescenti-brunnescenti, lobis 2—3 utrinque,
leviter crispis, brevibus, latis, deltoideis, reflexo-patentibus, acuminatis, lobo terminali
saepe longo, lingulato—sagittato, acuto, margine leviter crispo, integro vel parce
dentato, lobulis basalibus acutis.