The Botany of Iceland - 01.12.1942, Page 59

THE TARAXACUM-FLORA OF ICELAND
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Calathium 40—50 mm latum, planum, radians, obscure luteum, ligulae marginales
dilute cana notatae.
Antherae polliniferae.
Stigmata lutea.
Achenium laete stramineum (c. 162), 3.7—3.9 mm longum, c. 1.0—1,2 mm
latum, superne crebre spinulosum, dentibus acutis, + patentibus, ceterum + laeve,
in pyramidem cylindricam, c. 1 mm longam abiens. Rostrum c. 8 mm longum.
T. subcrispum has lanceolate, strongly lobed and somewhat crispate leaves often
with narrow, remotely placed, patent— + downward-bent, acute lobes and a large,
dark, radiating head with plenty of pollen.
It is no doubt spontaneous.
Habitat: Wet mountain-slope.
Localities: Laugar at Breiðamýri, 27.VII.1937, fr., phot., Siglufjörður, 13.VII.
1935, phot. (Outer bracts “anguste lanceolatae, claro- vel late purpureo-margi-
natae”).
Geogr. Distr. : Only found in Iceland.
45. Taraxacum ulophyllum M.P.Chr. n. sp.
Spec. orig.: Iceland, Varmahlíð, 17.VII.1937, leg. M. P. Christiansen. Plate IV,
fig. 45. Plate XXVII, fig. 165.
Planta mediocris—robusta, 20—35 cm alta. Folia leptalea, laete viridia, lutescentia
et canescentia, dense sed breviter araneosa, + crispa, lanceolata, subprofunde—parum
profunde lobata, petiolis alatis, pallidis, nervo mediano pallido—paulo colorato, lobis
4—5 utrinque, approximatis, deltoideis vel a basi latis, in apicem anguste deltoideum
vel hamatum, longum, acutum abeuntibus, antice grosse et irregulariter subulato-
dentatis, crispis, lobo terminali brevi, triangulari-hastato, sensim acuminato, interdum
obtusiusculo, o—pauci-dentato.
Involucrum basi turbinatum. Squamae exteriores adpressae—erecto-patentes, 3—4
X 9—14 mm, subtus laete—sat obscure olivaceo-virides, supra glaucescentes.
Calathium c. 45 mm latum, leviter convexum, + radians, perobscure luteum.
Ligulae planae, marginales 14—19 mm longae, c. 3 mm latae, subtus stria grisea—
sat purpurea notatae.
Antherae valde polliniferae.
Stigmata lutea, subtus + obscura.
Achenium 3.9—4.3 mm longum, 1.2—1.3 mm latum, superne robuste et longis-
sime spinulosum, ceterum tuberculato-squamulatum—laeve, in pyramidem + cylin-
dricam, 0.6—1 mm longam, superne saepe spinulosam abiens. Rostrum 10—11 mm
longum.
The head of T. ulophyllum is very dark. Leaves lanceolate, bright, + abundantly
short-hairy, somewhat crispate. The intermediate leaves have large, concave indenta-
tions and narrower claw-like, acute lobes (like the slender T. pleniflorum). Fruits
long, narrow, strongly spinous and with a long pyramid.—The species seems to be
rather isolated.
Habitat: Home-fields, ditches.
Localities: Blönduós, 14.VII.1937, Varmahlíð, 17.VII.1937, fr., phot., Bakkasel,
21.VII.1937, Siglufjörður, 30.VII.1937. N.
Geogr. Distr.: Only found in Iceland.
46. Taraxacum armatum M.P.Chr. n. sp.
Spec. orig.: Iceland, Skógar in Fnjóskadalur, 24.VII.1937, leg. M. P. Christian-
sen. Plate IV, fig. 46.