The Botany of Iceland - 01.12.1942, Page 110

336
M. P. CHRISTIANSEN
nervo raediano paulo brunnescenti, lobis 3—5 utrinque, approximatis, superioribus
basin versus latis et subulato-laciniatis, in apicem angustum—linearum, patentem—in-
curvum, breviter acutum abrupte abeuntibus, inferioribus -)- hamatis, magis acutis,
antice convexis, grosse et robuste dentatis, lobo terminali parvo, triangulari-hastato,
+ contracto et in apicem late lingulatum, mucronatum protracto, margine + ro-
tundato—dentato.
Involucrum ovatum. Squamae exteriores sat laxe arcuatae, lanceolatae—lineares,
2—3 X 8—10 mm, utrinque laete virides, supra glaucescentes.
Calathium 45-—50 mm latum, leviter convexum, subradians. Ligulae marginales
c. 2.5 mm latae, sat canaliculatae, subtus stria olivaceo- vel cano-violacea notatae.
Antherae valde polliniferae.
Stigmata virescentia.
Achenium griseo-stramineum, c. 4 mm longum, 1.0—1.2 mm latum, superne
grosse suberecto-spinulosum, ceterum spinuloso-tuberculatum—laeve, in pyramidem
cylindricam—subcylindricam, 0.7—0.9 mm longam, saepe spinulosam abiens. Rostrum
10—11 mm longum.
T. subhoþlites has densely lobed leaves, broad lobes with a coarsely dentate—
small-lobed base and narrow, patent, + upward turned or hamate point, a small,
hastate terminal lobe and long, somcwhat fusiform fruit. The species does not seem
to be related tó other Icelandic species.
Habitat: Birch-copses, lava-fields.
Localities: Reykjahlíð at Mývatn, 25.VII.1937, fr., phot., Námuskarð, 25.VII.
1937. N.
Geogr. Distr. : Only found in Iceland.
111. Taraxacum galeiferum M.P.Chr. n. sp.
Spec. orig.: Skógar in Fnjóskadalur, 24.VII.1937, leg. M. P. Christiansen. Plate
X, fig. 111. Plate XXXXIII, fig. 213.
Planta mediocris, 20—25 cm alta. Folia obscure lutescentia, margine purpureo,
sat dense araneosa, lingulato-lanceolata, sat crispa, profunde lobata, petiolis sublatis
—angustis cum nervis medianis laete et lucide purpureis, lobis approximatis,
aut deltoideis, patentibus vel + reflexis, acutis, antice saepe convexis et grosse
dentatis, dentibus latis et brevibus, aut praesertim superioribus basin versus latis
et convexis et in apicem falcatum attenuatis et inferioribus longe deltoideis, apicibus
patentibus— + reflexis—saepe falcatis, longe attenuatis, antice saepe uni-dentatis—
lobulatis et denticulatis, lobo terminali nunc brevi, triangulari-hastato vel late
galeato, obtuso—acutiusculo, lobulis basalibus brevibus, subacutis, saepe rotundatis,
nunc latiore, ovato-sagittato, inferiore parte grosse dentato.
Involucrum leviter turbinatum. Squamae exteriores sat angustae, laxe patentes—
arcuatae, 3.5—2.0 x 11—13 mm, subtus sat obscure et + purpureae, supra fere
ubique purpureae.
Calathium parvum, c. 35 mm latum, densum, convexum, luteum. Ligulae mar-
ginales c. 2.5 X 14 mm, subtus stria grisea—lutea—paulo purpurea notatae.
Antherae valde polliniferae.
Stigmata lutescentia—virescentia.
Achenium fusco-brunneum, c. 3 mm longum, 1.0—1.2 mm latum, superne dense
et grosse incurvo-spinulosum, ceterum spinuloso-tuberculatum, basi fere laeve, in
pyramidem 0.7—1.0 mm longam, cylindricam abiens. Rostrum 10—11 mm longum.
T. galeiferum has densely lobed leaves, the lobes broad with a shorter or longer,
often falcate point from the dentate—small-lobed base, small hastate—galeate
terminal lobes, often with a narrow point, small, densely flowered heads with
plenty of pollen, and a + small, thick fruit with a long, narrow pyramid. In