The Botany of Iceland - 01.12.1942, Side 62
288
M. P. CHRISTIANSEN
lanceolata, sat profunde lobata, petiolis latis, pallidis, nervo mediano pallido, lobis
2—3 utrinque, valde distantibus, alternis, lineari-deltoideis, in apicem longe acumina-
tum, patentem—sat porrectum vel leviter reflexum sensim attenuatis, antice integris
—pauce dentatis, interlobiis longissimis, sat latis, plerumque integris, lobo terminali
aliquantum longiore, sagittato-hastato, saepe in apicem sat angustum, longum,
dilatatum, breviter acutum protracto, pauce dentato.
Squamae exteriores numerosae, erecto-patentes—laxe recurvatae, 2.5—1.5 mm
latae, 10—11 mm longae, lineari-lanceolatae—lineares, subtus olivaceo-virides, -f-
claro- vel rubro-marginatae, supra virides, + coloratae, interiores anguste lineares,
apice obscuro.
Calathium c. 40 mm latum, obscure luteum. Ligulae marginales angustae, subtus
stria cano-purpurea notatae.
Antherae valde polliniferae.
Stylus et stigmata virescentia(—atro-virescentia).
Achenium dilute stramineum (162), 3.6—3.8 mm longum, superne dense, longe,
patenter vel erecto-spinulosum, ceterum spinuloso-tuberculatum, interdum laeve, in
pyramidem cylindricam, c. 0.7 mm longam, basi 1—2-spinulosam abiens. Rostrum
7—8 mm longum.
T. pravum has fruits of the same type as T. hastile and nearly allied species,
but may be distinguished from these species by the remotely placed narrow lobes
and the very long, often distorted terminal lobe. See also T. hastile. In the type
of the leaf the species further recalls T. subcrispum, but the latter is much larger
and more robust with large heads.
The species is no doubt spontaneous.
Habitat: Grassy mountain-slopes, banks of rivulets, birch-copses, home-fields,
meadows, etc.