The Botany of Iceland - 01.12.1942, Qupperneq 100

326
M. P. CHRISTIANSEN
with a very long pyramid. It does not seem to be closely related to other Icelandic
species.
Habitat: Home-fields, ditches, rock-ledges, lava-fields, etc.
Localities: Stóriendi ! in Þórsmörk, 8.VII.1937, Breiðabólsstaður, 9.VII.1937. S.
-—Hveragerði !, 2.VII.1937, Þrastarlundur !, 11.VII.1937, Laugarvatn, 11.VII.1937,
Þingvellir !, 30.VI.1937, Hafnarfjörður, 9.VII.1935, Reykir at Álafos, 29.VI.1937.
S.W.—Akranes !, 13.VII.1937, Flatey ! in Breiðifjörður, 10.VII.1935, phot. W.—
Bílðudalur, 11.VII.1935, Patreksfjörður, 11.VII.1935, ísafjörður !, l.VIII.1937,
Flateyri in önundarfjörður !, l.VIII.1937. N.W.—Blönduós !, 14.VII.1937.
Víðimýri !, 19.VII.1937, Bakkasel !, 21.VII.1937, Siglufjörður, 13.VII.1935,
Akureyri !, 22.VII.1937, Nes, Skógar ! and Vaglaskógar ! in Fnjóskadalur, 23.VII.
1937, Einarsstaðir !, 24.VII.1937, Laugar at Breiðamýri !, 26.VII.1937, Skútustaðir
at Mývatn, 29.VII.1935, Reykjahlíð at Mývatn, 25.VII.1937, Lindabrekka, 16.VII.
1935. N.—Egilsstaðir, 19.VII.1935, fr., Arnheiðarstaðir !, 20.VII.1935, Brekka !,
20.VII.1935. E. Abundant in all these places.
Geogr. Distr.: Only found in Iceland.
100. Taraxacum gibberosum M.P.Chr. n. sp.
Spec. orig.: Iceland, Egilsstaðir, 20.VII.1935, leg. M. P. Christiansen. Plate IX,
fig. 100. Plate XXXVIII, fig. 200.
Planta sat robusta, 20—35 cm alta. Folia saturate viridia—sat obscure canescenti-
vel glaucescenti-viridia, fere glabra, lanceolata, profunde lobata, petiolis cum nervo
mediano pallidis, lobis 5—7 utrinque, approximatis, sat longis, acuminatis, deltoideis,
reflexo-patentibus, superioribus fol. exteriorum basin versus latis, valde convexis
et in apicem breviter acutum, reflexum, sat abrupte abeuntibus, antice saepe
sigmoideis, integris vel inferioribus subulato-dentatis, lobo terminali aut parvo, supra
medium abrupte in apicem lingulatum, mucronatum protracto, aut latiore triangulari-
sagittato.
Scapi pallidi—brunnescentes, glabri.
Involucrum sat turbinatum. Squamae exteriores arcuatae vel erecto-patentes,
3—2 X c. 13 mm, subtus sat olivaceo-virides, supra laete virides, apice purpureo,
interiores + pruinosae, apice obscure purpureo-marginatae, o—parce corniculatae.
Calathium c. 40 mm latum, sat obscure luteum, densum, ligulae marginales subtus
stria cano-violacea notatae.
Antherae polline carentes(—interdum polliniferae).
Stylus virescens. Stigmata virescentia, subtus obscura.
Achenium cano- vel olivaceo-brunneum, superne spinulis robustis, latis, suberectis
—incurvis praeditum, in pyramidem 0.7—0.9 mm longam, cylindricam abiens.
T. gibberosum has lanceolate Ieaves, often densely placed, somewhat narrow, +
downward-curved—patent lobes, often strongly convex at the base; small heads
without pollen; small, + recurved outer bracts, and strongly spinous fruits.—The
species was cultivated in many specimens from plants derived from different localities.
In a single case a plant had many heads without pollen, but also a single head with
plenty of pollen. The species does not seem to be related to other Icelandic species.
Habitat: Grassy banks of rivulets, home-fields.
Localities: Egilsstaðir, 20.VII.1935, plentiful, fr., Brekka, 21.VII. 1935, plentiful,
phot., Hallormstaður, 24.VII.1935. E.
Geogr. Distr. : Only found in Iceland.