The Botany of Iceland - 01.12.1942, Qupperneq 41
THE TARAXACUM-FLORA OF ICELAND
267
Habitat: Home-fields.
Localities: Vestmannaeyjar, 5.VII.1935, fr., S.
Geogr. Distr.: Only found in Iceland.
16. Taraxacum azureum M.P.Chr. n. sp.
Spec. orig.: Iceland, Varmahlíð, 18.VII.1937, leg. M. P. Christiansen. Plate II,
fig. 16. Plate XIII, fig. 124.
Planta 20—35 cm alta. Folia laete lutescenti- vel canescenti-viridia, exteriora
parce maculata, sat dense sed breviter araneosa, leptalea, late lingulato-lanceolata,
subintegra et grosse dentata, dentibus acutis, patentibus—hamatis vel parum lobata,
petiolis sat latis—sat angustis, pallidis—paulo roseis, nervo mediano inferne leviter
rubescenti, lobis approximatis, altis, deltoideis, saepe patulis, acutis, antice saepe
dentatis, lobo terminali mediocriter longo, sagittato-hastato, breviter acuto, o—pauci-
dentato.
Scapi folia superantes, + brunnescentes, fere glabri.
Squamae exteriores adpressae—sat erectae, 2—4 X 10—13 mm, ovatae—lan-
ceolatae—lineares, in apicem sensim attenuatae, subtus sat obscure olivaceo-virides,
late albido- vel claro-marginatae, supra laete virides, interiores dilute virides,
pruinatae, denique valde azureo-pruinatae.
Calathium c. 45 mm latum, obscure luteum, sat radians. Ligulae marginales sat
latae, subtus stria cano-olivacea—sat purpurea notatae.
Antherae valde polliniferae.
Stigmata parce virescentia.
Achenium stramineum (162), c. 3.9 mm longum, c. 1.2 mm latum, in superiore
parte dense, sat robuste spinulosum, ceterum + spinuloso-tuberculatum vel squamu-
losum, in pyramidem conico-cylindricam, 0.6 mm longam, basi interdum spinulosam
abiens. Rostrum c. 8 mm longum.
T. azureum seems to be closely related to T. lonchoþhyllum and T. egilsstadirense,
but differs among other things by the vivid azure colour of the involucre bracts
and its broader leaves.
It is spontaneous.
Habitat: Wet, grassy mountain slope, meadows.
Localities: Varmahlíð, 18.VII.1937, plentiful, fr., phot. N.
Geogr. Distr.: Only found in Iceland.
17. Taraxacum egilsstadirense M.P.Chr. n. sp.
Spec. orig.: Iceland, Egilsstaðir, 20.VII.1935, leg. M. P. Christiansen. Plate II,
fig. 17. Plate XVI, fig. 133.
Planta 20—30 cm alta. Folia obscure viridia, lutescentia, leviter araneosa, +
purpureo-maculata, lingulato-lanceolata, integra et robuste dentata—2—3-loba,
petiolis sat latis—sat angustis, intense purpureis, nervo mediano saepe pro max.
parte purpureo, lobis basin versus latis et in apicem angustum, patentem—reflexo-
hamatum, acutum abeuntibus, + dentatis, lobo terminali longo, triangulari—lingulato,
basi sagittato-hastato, breviter acuto, saepe integro.
Involucrum 16 X 11 mm, + pruinosum. Squamae exteriores erecto-patentes—
recurvatae, 2.0—4.5 X 10—11 mm, subtus laete olivaceo-virides, + rubescentes,
conspicue claro- vel rubro-marginatae, supra glaucescentes, + laete purpurescentes.
Calathium 30—50 mm latum, valde convexum, obscure luteum. Ligulae
marginales c. 3 X 18 mm, subtus stria cano-olivacea—obscure olivaceo-purpurea
notatae.
Antherae polliniferae.