The Botany of Iceland - 01.12.1942, Qupperneq 49

THE TARAXACUM-FLORA OF ICELAND
275
loba, petiolis sat latis—angustis, pallidis, nervo mediano pallido—paulo rubescenti,
lobis sat distantibus, subbrevibus, latis, deltoideis, patentibus, acutis vel lobis interdum
ad basin latissimis et in apicem patentem—leviter hamatum, angustum, acuminatum
attenuatis, antice integris vel pauce sed robuste dentatis, lobo terminali parvo—
mediocri, triangulari—hastato, acuto, integro, interlobiis latis, robuste dentatis.
Scapi + brunnescentes, fere glabri.
Involucrum basi sat turbinatum. Squamae exteriores paucae, adpressae—laxe
erecto-adpressae, 2—3 mm latae, lineari-lanceolatae, subtus laete— + obscure
olivaceo-virides, + purpurascentes, angustissime albido-marginatae, supra + pur-
purascentes.
Calathium 30—35 mm latum, planum, densum, obscure luteum, ligulae marginales
breves, subtus stria cana vel paulo purpurea notatae.
Antherae polline carentes.
Stigmata lutea—leviter virescentia.
Achenium c. 4 mm longum, c. 1.2 mm latum, obscure stramineum (153), superne
crebre et breviter spinulosum, ceterum laeve vel tuberculatum, in pyramidem late
conicam, c. 0.4 mm longam sensim abiens. Rostrum c. 11 mm longum.
In T. divaricatum the fruit has same form as that of T. scotolepidijorme, but
differs from this species by its long, often many-lobed leaves and thus recalls T.
croceum var. ceratolobum Dahlst. The latter, however, has finer, more reflexed or
hamate lobes and fruits with coarser teeth.
It is spontaneous.
Habitat: Grassy mountain-slopes, wet meadows, etc.
Localities: Laugar at Breiðamýri, 27.VII.1937, plentiful, fr., phot., Reykjahlíð
at Mývatn, 26.VII.1937. Nes in Fnjóskadalur, 23.VII.1937. N.
Geogr. Distr.: Only found in Iceland.
30. Taraxacum subnefrens M.P.Chr. n. sp.
Spec. orig.: Iceland, Stykkishólmur, 9.VII.1935, leg. M. P. Christiansen. Plate
III, fig. 30.
Planta parva, gracilis. Folia obscure viridia, parce araneosa, lingulata—lingulato-
lanceolata, integra, breviter, late et saepe curvati-dentata vel parum profunde 2-loba,
petiolis pallidis, nervo mediano pallido—paulo colorato, lobis latis, brevibus, lobo
terminali Iongo, lingulato—hastato, breviter acuto, integro—parce dentato.
Scapi fere glabri.
Involucrum obscure viride. Squamae exteriores laxe patentes, lineares, 1—2 mm
latae, subtus obscure olivaceo-virides, supra laete virides—glaucescentes, ecorni-
culatae.
Calathium obscure luteum.
Antherae valde polliniferae.
Achenium fusco-stramineum—brunneum (153), c. 4.3 mm longum, c. 1.2 mm
latum, aequilatum, superne parce spinulosum vel tuberculatum, ceterum laeve et
striatum, in pyramidem conicam, basi parce et minute spinulosam, c. 0.5 mm longam
sensim abiens. Rostrum c. 8 mm longum.
T. subnefrens is small and slender with dark-green, slightly lobed leaves and dark
heads. Its fruits are rather large, equally broad and slightly toothed. The species
does not seems to be closely related to other Icelandic species.-—In my garden it
had exactly the same appearance as in its natural habitat.
It is no doubt spontaneous.
Habitat: Grassy spots on rock-ledges.
Localities: Stykkishólmur, 9.VII.1935, plentiful, fr. W.
Geogr. Distr.: Only found in Iceland.