The Botany of Iceland - 01.12.1942, Side 30

256
M. P. CHRISTIANSEN
ff. Leaves not crispate.
g. Lobes often long and strongly reflexed.
10. T. clitolobum M.P.Chr.
gg. Lobes with — suddenly constricted, short, patent apex.
11. T. subreduncum M.P.Chr.
cc. Petioles -)- pink—purple coloured.
d. Petioles slightly coloured. Leaves very long, strap-like with patent teeth or
lobes.
12. T. loratum M.P.Chr.
dd. Petioles deeply purple-coloured. (Species of Naevosa and Eu-Spectabilia).
bb. Anthers with pollen (see also 7 T. longisagittatum above).
c. Petioles pale—slightly pink (see also 18 T. akranesense below).
d. Leaves dark—blackish green.
e. Leaves linear-lanceolate, entire and spinous or shallow-lobed with -f- patent
—reflexed, narrow, tapering lobes. Fruit with short, + cylindrical pyramid.
13. T. lonchoþhyllum M.P.Chr.
ee. Leaves lingulate-—lanceolate. Fruit with a very broad short conic pyramid.
14. T. laticonicum M.P.Chr.
dd. Leaves bluish green or pale green.
e. Terminal lobe of leaves short. Leaves deeply bluish green, densely purple-
spotted, lanceolate, deeply lobed. Lobes deltoid, + reflexed, tapering.
15. T. þycnostictum M.P.Chr.
ee. Terminal lobe of leaves long. Leaves broadest towards the end with densely
placed lobes. Head dark yellow. Bracts + deeply azure.
16. T. azureum M.P.Chr.
cc. Petioles + purple-coloured, especailly in the inner leaves.
d. Leaves + purple-spotted. Corollas very dark yellow.
17. T. egilsstadirense M.P.Chr.
dd. Leaves partly, new ones entirely purple—tar-brownish, entire and spinous
or shallow-lobed.
18. T. akranesense M.P.Chr.
aa. Immaculata. Leaves without purplish blotches.
b. Fruit straw-yellow—light grey.
c. Eu-Crocea. Pyramid of fruit short, most frequently broad and conic.
d. Anthers without pollen.
e. Terminal lobe of leaves long, sagittate—hastate.
f. Terminal lobe often with a rounded end.
19. T. crasþedotum Dahlst.
ff. Terminal lobe + tapering.
g. Lobes patent—slightly hamate, acute.
h. Head small, densely flowered, light yellow. Herbs very slender.
20. T. gladiatum M.P.Chr.
hh. Head broader, dark yellow. Herbs larger.
(See 29 T. divaricatum M.P.Chr.)
gg. Lobes + reflexed.
h. Fruit everywhere spinous—warty. Outer bracts dark-green, + white-
margined. Lobes strongly reflexed.
21. T. declive M.P.Chr.
hh. Fruit only spinous at the summit.
i. Outer bracts broad, ovate, appressed, white-margined. The plant rather
sturdy.
j. Lobes densely placed, high with acuminate end.
22. T. acutatum M.P.Chr.