The Botany of Iceland - 01.12.1942, Síða 42
268
M. P. CHRISTIANSEN
Stigmata lutea—virescentia.
Achenium canum—stramineum (162—154), c. 3.5 mm longum, c. 1.2 mm
latum, in superiore parte crebre et robuste spinulosum, ceterum tuberculatum, in
pyramidem conicam, 0.4—0.5 mm longam, saepe inferne spinulosam abiens. Rostrum
9—10 mm longum.
T. egilsstadiren.se seems to be closely related to T. lonchophyllum and T. azureum,
but differs from both by having vividly purple-coloured petioles. T. lonchophyllum
and T. egilsstadirense were both cultivated, side by side, and proved to be different.
T. egilsstadirense is certainly spontaneous.
Habitat: Birch-copses.
Localities: Þrastarlundur, 11.VII.1937. S.W.—Egilsstaðir, 18.VII.1935, fr.,
phot., Hallormsstaður, 24.VII.1935. E.
Geogr. Distr.: Only found in Iceland.
18. Taraxacuin akranesense M.P.Chr. n. sp.
Spec. orig.: Iceland, Akranes, 12.VII.1937, leg. M. P. Christiansen. Plate II,
fig. 18. Plate XII, fig. 122.
Planta 20—30 cm alta. Folia saturate viridia vel saepius valde brunnescentia,
folia nova fere ubique brunneo-purpurea, exteriora parce araneosa, lingulata, integra,
margine dentato, interiora dense sed breviter araneosa, integra, margine longe et
robuste dentata, margine inter dentes concavo, petiolis sat latis—sat angustis, fol.
exteriorum pallidis, fol. interiorum purpureis, nervo mediano leviter—lucide et
ubique purpureo.
Involucrum basi leviter turbinatum. Squamae exteriores adpressae—erecto-ad-
pressae, 1.5—2.5 mm latae, lineares, sensim attenuatae, subtus olivaceo-virides,
angustissime sed conspicue albido-marginatae, pruinosae, supra glaucescentes, + laete
purpurascentes.
Calathium c. 40 mm latum, obscure luteum, radians. Ligulae marginales c. 16 mm
longae, c. 3 mm latae, subtus stria cana vel paulo purpurea notatae.
Antherae polliniferae.
Stylus luteus. Stigmata lutea, subtus obscura.
Achenium stramineum vel paulo rufescens, 3.7—3.9 mm longum, c. 1.2 mm
latum, superne crebre, sat late, acute, erecto-spinulosum, ceterum tuberculatum—•
laeve, in pyramidem late conicam, 0.3—0.5 mm longam sensim abiens. Rostrum
c. 9 mm longum.
The fruits of T. akranesense and T. reclinatum are alike in shape, but the two
species are hardly related. The former is distinguished by the purple—tar—brownish
leaves (also in my garden). In this feature it differs from all other Icelandic species.
It is spontaneous.
Habitat: Rock-ledges, grassy places.
Localities: Akranes, 12.VII.1937, plentiful, fr., phot. W.
Geogr. Distr.: Only found in Iceland.
Immaculata.
Eu-Crocea.
19. Taraxacum craspedotum Dahlst. (?).
H. Dahlstedt: Taraxaca fran vastra Norge, 1923—24, p. 9.—De svenska arterna
av slágtet Taraxacum. VIII. Spectabilia, 1930, p. 77.—M.P.Chr. Plate II, fig. 19.
Plate XIV, fig. 126.