The Botany of Iceland - 01.12.1942, Page 39

THE TARAXACUM-FLORA OF ICELAND
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Ligulae marginales c. 16 mm longae, c. 2.5 mm latae, subtus stria cano- vel obscuro-
purpurea notatae.
Antherae polline carentes.
Stigmata lutea—subtus sat obscura.
Achenium laete stramineum (162—154), 3.6—-3.9 mm longum, 1.2—1.3 mm
latum, sat turbinatum, superne crebre et minute spinulosum, ceterum laeve—sat
tuberculatum, in pyramidem latam, 0.3—0.5 mm longam, conicam, basi interdum
spinulosum sensim abiens. Rostrum 10—12 mm longum.
T. loratum is identified by its long strap-like leaves with outward-turned lobes
or teeth. It is no doubt related to T. maculigerum Lindb. fil. and T. loncliophyllum,
but these species have coarser teeth on the achene, darker leaves, and as a rule they
have plenty of pollen.—T. loratum has been cultivated in Koge, Denmark. The
specimens were very small, but typical. Died during the summer drought.
It is spontaneous.
Habitat: Moors, heaths, ditches, but also home-fields.
Localities: Vestmannaeyjar, 5.VII.1935, Breiðabólsstaður, 9.VII.1937, fr., phot.
S.—Þrastarlunður, 11.VII.1937. S.W.—Víðidalur, Lón, 4.VIII.1935 (Steindórs-
son). S.E.
Geogr. Distr.: Only found in Iceland.
13. Taraxacum lonchophyllum M.P.Chr. n. sp.
Spec. orig.: Iceland, Brekka, 21.VII. 1935, leg. M. P. Christiansen. Plate I, fig.
13. Plate XIX, fig. 141.
Planta 25—40 cm alta. Folia + obscure viridia, + purpureo-maculata, fere
glabra, longa, oblanceolata, anguste lanceolate vel lineari-lanceolata, integra, + den-
tata, dentibus distantibus, latis, acutis, margine inter dentes + denticulato, vel
2—4-loba, lobis basin versus latissimis, saepe gradatim in interlobia transeuntibus,
in apicem + patentem, acutiusculum— + acutum abeuntibus, integris—parce den-
tatis, lobo terminali mediocri—perlongo, sagittato—hastato, saepe integro, interlobiis
longis, sat latis, integris—parce dentatis, petiolis longis, + angustis, pallidis, nervo
mediano pallido-—paulo colorato.
Involucrum olivaceo-viride.
Squamae exteriores adpressae—erecto-adpressae, 3—4 X 11—-12 mm, + obscure
olivaceo-virides, + late albo-marginatae, supra laete virides, + purpurascentes.
Calathium c. 50 mm latum, radians, obscure luteum, ligulae marginales longae,
3 X 20 mm, subtus stria cano-purpurea notatae.
Antherae polliniferae.
Stigmata lutea.
Achenium olivaceo-stramineum (158—153), c. 4.2 mm longum, c. 1.2 mm latum,
superne dense et robuste spinuloso-squamulosum, ceterum tuberculatum—laeve, in
pyramidem sat latam, 0.6—0.8 mm longam, abrupte conico-cylindricam abiens.
T. lonchophyllum is closely related to T. maculigerum Lindb. fil., but differs
from the typical specimens of this species by frequently having quite pale petioles
and broadly white-margined outer bracts (vide also T. loratum p. 264 and T.
egilsstadirense p. 267).
It is no doubt spontaneous.
Habitat: Moist mountain slopes, ditches.
Localities: Hraundalshraun, 29.VII.1905 (Helgi Jónsson). S.W.—Varmahlíð,
20.VII.1937. N.—Brekka, 21.VII.1935, plentiful, fr., phot., Hallormsstaður, 24.VII.
1935. E.
Geogr. Distr.: Only found in Iceland.