The Botany of Iceland - 01.12.1942, Blaðsíða 97

THE TARAXACUM-FLORA OF ICELAND
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placed teeth or small lobes; the fruits are large with large, coarse teeth at the
summit, on the inner fruit often only one large tooth on each side. The species
seems to be closely related to T. leucoceþhalum, but differs from that species among
other things by its larger fruits.
Habitat: Home-fields.
Localities: Varmahlíð, 20.VII.1937, fr., phot. N.
Geogr. Distr.: Found, outside Iceland, in Greenland (Igaliko, 28.VII. 1926
Knud Jessen).
95. Taraxacum dentex M.P.Chr. n. sp.
Spec. orig.: Iceland, Reykjahlíð at Mývatn, 25.VII.1937, leg. M. P. Christian-
sen. Plate VIII, fig. 95.
Planta sat mediocris, 15—25 cm alta. Folia laete viridia, + araneosa, late lan-
ceolata, integra et robuste dentata vel parum lobata, petiolis pallidis—leviter roseis,
lobis brevibus, deltoideis, acutis, reflexis, interdum + hamatis, antice rectis—con-
cavis, + subulato-dentatis, lobo terminali magno, sagittato-hastato, obtuso-acutiusculo,
supra lobulos basales late et robuste dentato.
Scapi folia superantes, + brunnescentes.
Involucrum basi turbinatum. Squamae exteriores. 4—2 X 11 mm, patentes—
arcuatae, subtus olivaceo-virides, supra glaucescentes, + laete purpureae.
Calathium ignotum.
Achenium griseo-brunneum, c. 3.6 mm longum, 1.3—1.5 mm latum, superne
spinulis latis, robustis, acutis praeditum, ceterum squamuloso-tuberculatum—laeve,
in pyramidem 0.3—0.4 mm longam, latam, cylindricam vel subconicam sat abrupte
abiens. Rostrum c. 11 mm longum.
T. dentex seems to be closely related to T. latidens.
Habitat: Birch-copses.
Localities: Reykjahlíð at Mývatn, 25.VII.1937, fr. N.—Brekka, 21.VII.
1935 (?). E.
Geogr. Distr.: Only found in Iceland.
96. Taraxacum uncatilobum M.P.Chr. n. sp.
Spec. orig.: Iceland, Laugar at Breiðamýri, 27.VII.1937, leg. M. P. Christiansen.
Plate VIII, fig. 96. Plate XXXXII, fig. 210.
Planta mediocris—sat parva. Folia dilute—pure viridia, fere glabra, lanceolata,
profunde lobata, petiolis pallidis, nervo mediano pallido, lobis 3—5 utrinque, distanti-
bus—sat approximatis, sat angustis, hamatis, obtusis, antice uni- vel pauci-dentatis,
dentibus latis, obtusis, lobo terminali brevi, sagittato—cordato, in apicem obtusum,
sat abrupte protracto, vel triangulari-ovato, integro, obtuso, lobulis basalibus
hamatis, obtusis.
Scapi folia aequantes vel superantes, glabri, pallidi—colorati.
Squamae exteriores patulae—arcuatae, subtus sat obscure olivaceo-virides, supra
dilute virides, apice paulo purpureo.
Calathium parvum, c. 35 mm latum, convexum, densum, luteum. Ligulae leviter
canaliculatae, marginales c. 2 X 12 mm, subtus stria obscure cano-purpurea
notatae.
Antherae polliniferae.
Stigmata virescentia, subtus obscura.
Achenium griseum, c. 3.2 mm longum, c. 1.1 mm latum, superne spinulis densis,
robustis, suberectis praeditum, ceterum laeve—parce tuberculatum, in pyramidem
cylindricam, 0.6—0.7 mm longam abiens. Rostrum 8—9 mm longum.