The Botany of Iceland - 01.12.1942, Qupperneq 106

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M. P. CHRISTIANSEN
c. Petioles narrow, like midnerve dark purple-coloured. Lobes short, triangular
and patent. Fruit broad, densely spinose above and with a cylindrical pyramid.
105. T. brachylobum M.P.Chr.
cc. Petioles somewhat broad, rose—purple-coloured, midnerve pale—slightly
coloured. Leaves yellowish-green.
d. Leaves shallow-lobed; lobes entire—slightly denticulate; terminal lobe of the
leaves short, triangular-hastate or galeate.
e. Fruit fusiform, remotely and finely spinous above, and with conic, finely
furrowed pyramid.
106. T. melanocephalum M.P.Chr.
ee. Fruit broadest above, strongly spinous with long spines and with a narrow,
cylindrical pyramid.
107. T. longisþinulosum M.P.Chr.
dd. Leaves, especially the inner ones, entire and strongly dentate, laciniate or
with a large, coarsely dentate terminal lobe.
e. Inner leaves entire, long and irregularly dentate; teeth patent.
108. T. chloodeum M.P.Chr.
ee. Inner leaves with large, ovate, mucronate terminal lobe, which is strongly
dentate below.
109. T. luxurians M.P.Chr.
bb. Leaves deeply lobed, lobes often strongly dentate.
c. Leaves densely lobed, often somewhat crispate.
d. Heads large, radiating, dark yellow. Lobes, especially on the outer leaves,
hamate and obtuse.
(See 86. T. selenoþhoreum M.P.Chr.).
dd. Heads + small, densely flowered, yellow—light-yellow. Lobes often with
long, abrupt point.
e. Fruit long, + fusiform.
110. T. subhoplites M.P.Chr.
ee. Fruit shorter. Head very small and dense.
111. T. galeiferum M.P.Chr.
cc. Leaves with remotely placed, long, very narrow—thread-formed, dentate
lobes; small heads and female flowers.
(See 4. T. nematolobum M.P.Chr.).
105. Taraxacum brachylobum M.P.Chr. n. sp.
Spec. orig.: Iceland, Varmahlíð, 18.VII.1937, leg. M. P. Christiansen. Plate IX,
fig. 105. Plate XXXXII, fig. 211.
Planta alta, robusta. Folia lutescenti-viridia, sat araneosa, fol. juvenilia dense et
breviter araneosa, obovato-lanceolata—lingulato-lanceolata, integra et dentata vel
parum lobata, petiolis sublatis—angustis, lucide purpureis, nervo mediano + pur-
pureo, lobis approximatis, brevibus, latis, triangularibus, patulis, acutis, integris vel
inferioribus dentatis—denticulatis, apice interdum parce incurvo, lobo terminali
aut brevi, triangulari-hastato, mucronato, aut longiore et hastato vel magno, +
ovato.
Involucrum latum, sat breve, 12 X 17 mm. Squamae exteriores suberectae—laxe
patentes, subtus olivaceo-virides, supra laete virides, 4—3 X 12—14 mm, ovato-
lanceolatae—lineares, interiores c. 21 mm longae.
Calathium 50—60 mm latum, sat obscure luteum. Ligulae marginales sat an-
gustae, subtus stria o—paulo cano-purpurea notatae.
Antherae polliniferae.
Stigmata lutea—paulo virescentia.