The Botany of Iceland - 01.12.1942, Side 68

294
M. P. CHRISTIANSEN
Planta 15—30 cm alta. Folia dilute—sat obscure viridia, + purpureo-maculata,
parce araneosa, lingulato-lanceolata—late lanceolata, 2—4-loba, petiolis angustis,
purpureis, nervo mediano fere ubique purpureo, lobis approximatis, latissimis—inter-
dum angustis, hamatis—reflexo-deltoideis vel subdistantibus in apicem angustum,
acuminatum abeuntibus, antice concavis, denticulatis, interlobiis latis, lobo terminali
parvo, triangulari-cordato, mucronato vel in apicem parce protracto. Folia interiora
+ integra.
Squamae exteriores 4—2 X 9 mm, plerumque latae, ovato-lanceolatae—lan-
ceolatae, obtusae, laxe patentes, subtus obscure olivaceo-virides, + purpureo-mar-
ginatae, interdum purpurascentes, supra virides, + purpurascentes.
Calathium 40—50 mm latum, planum, fere densum, laete luteum. Ligulae mar-
ginales c. 3.5 X 15 mm, subtus stria sat roseo-purpurea notatae.
Antherae polline carentes(—sat polliniferae).
Stigmata virescentia, subtus obscura.
Achenium c. 4 mm longum, c. 1.3 mm latum, superne crebre et robuste erecto-
spinulosum, ceterum + tuberculatum, in pyramidem conico-cylindricam, 0.3 mm
longam abiens. Rostrum 8—9 mm longum.
T. reclinatum has purple-spotted, dark-green leaves with + broad, convex, acute
lobes; the teeth of the fruit are coarse and + appressed and almost cover the short
pyramid; T. akranesense has a similar fruit; but in other respects the two species
do not seem closely related.—The species was cultivated at Koge and had plenty
of pollen there.
Habitat: Home-fields, ditches.
Localities: Reykjavík, 6.VII.1935. S.W.—Reykjahlíð at Mývatn, 25.VII.1937,
fr., Einarsstaðir, 27.VII.1937, phot., plentiful, Varmahlíð, 18.VII.1937. N.
Geogr. Distr.: Only found in Iceland.
56. Taraxacum subeximium M.P.Chr. n. sp.
Spec. orig.: Iceland, Egilsstaðir, 18.VII.1935, leg. M. P. Christiansen. Plate V,
fig. 56. Plate XXXI, fig. 178.
Planta robusta, 25—40 cm alta. Folia obscure viridia, brunnescentia, pauce pur-
pureo-maculata, sat dense araneosa, lingulato-lanceolata—sat late lanceolata, integra
et dentata vel lobulata, petiolis angustis, longis, lucide purpureis, nervo mediano
purpureo, dentibus brevibus, latis, patentibus vel hamatis, margine inter dentes nervo
mediano parallelo. Folia intermedia plantae cultae regulariter lobata, lobis ap-
proximatis, deltoideis, + reflexis—patentibus, acutis, antice sigmoideis—rectis, lobo
terminali brevi, triangulari-hastato.
Squamae exteriores erecto-patentes, 4—3 X 9—10 mm longae, sensim attenuatae,
subtus Iaete virides, piloso- et purpureo-marginatae, apice brunneo-purpureo, supra
virides et purpureo-marginatae.
Calathium 45—50 mm Iatum, fere densum—leviter radians, planum— + con-
vexum, obscure luteum. Ligulae marginales planae, c. 3.5 X 15 mm latae, subtus
stria late et lucide roseo-purpurea notatae.
Antherae valde—interdum parce polliniferae.
Stylus et stigmata virescentia, subtus atro-virescentia.
Achenium fusco-stramineum, 3.6—4.0 mm longum, 1.5-—1.7 mm latum, superne
latissimum, crebre et sat robuste spinulosum, spinulis erecto-patentibus, ceterum
tuberculatum vel laeve, in pyramidem sat late conicam, 0.5—0.6 mm longam abiens.
Rostrum 8—9 mm latum.
T. subeximium has shining, red petioles and midnerves, dark-green leaves and
dark-yellow heads. It differs from T. eximium among other things by its fruits, which
are furnished at the summit with long, patent—upward-turned, acute teeth.