The Botany of Iceland - 01.12.1942, Side 28
254
M. P. CHRISTIANSEN
c. Ceratophora Dahlst.
4. Taraxacum nematolobum M.P.Chr. n. sp.
Spec. orig.: Iceland, Múlakot, 5.VII.1937, leg. M. P. Christiansen. Plate I, fig. 4.
Plate XI, fig. 119.
Planta mediocris, 20—30 cm alta. Folia obscure viridia, sat araneosa, late lan-
ceolata, perprofunde lobata et laciniata, petiolis angustis—perangustis, lucide et
obscure rubro-purpureis, lobis nunc perdistantibus, anguste linearibus, patentibus,
perlongis, acutis, marginibus superioribus et saepe inferioribus irregulariter subulato-
dentatis vel laciniatis, nunc ad basin latis et in apicem longum, acuminatum, +
reflexum, sat abrupte vel sensim attenuatis, antice denticulatis et singulariter subu-
lato-dentatis, lobo terminali parvo, aut triangulari, acuto, lobulis basalibus subulato-
acutis, + reflexis, margine + rotundato vel leviter dentato, aut perparvo, hastato,
supra medium contracto et in apicem longum, linearem, acutum protracto, lobulis
basalibus angustis, linearibus, patulis, supra lobulos basales + rotundato inciso.
Involucrum basi truncatum, olivaceo-viride, pruinosum. Squamae exteriores pa-
tentes—leviter arcuatae vel sigmoideae, subtus laete virides, albido-marginatae, supra
laetiores, glaucescentes, 3.5—2 X 10—12 mm, sub apice late et acute comiculatae,
apice + rubescentes.
Calathium c. 45 mm latum, perdensum, convexulum, laete luteum—luteum,
ligulae + cuculliformes, marginales c. 15 X 3 mm, subtus stria brunneo-purpurea
notatae.
Antherae polline carentes.
1 $ means that the species is collected.
o means that the species is only noted.