The Botany of Iceland - 01.12.1942, Side 31

THE TARAXACUM-FLORA OF ICELAND
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jj. Lobes obtuse—shortly acute.
23. T. devexum M.P.Chr.
ii. Outer bracts narrow. The plants slender. Lobes often narrow and
tapering.
24. T. perdevexum M.P.Chr.
ee. Terminal lobe of leaves short, triangular or ovate—cordate.
f. Lobes of leaves reflexed, often closely placed. Leaves lingulate—lingulate-
lanceolate. The terminal lobe cordate—cordate-hastate.
g. Outer bracts roundish-ovate with broad, white margins.
25. T. subscolopendricum M.P.Chr.
gg. Outer bracts narrower.
27. T. sagittifrons M.P.Chr.
ff. Lobes of leaves patent— + hamate.
g. Outer bracts dark olive green, appressed. Lobes of leaves deltoid or high
with an acute tip.
26. T. sigmoideum M.P.Chr.
gg. Outer bracts bright olive-green and + red-margined.
h. Very slender. Lobes of the leaves with hamate and subulate apices.
(See 43 T. pleniflorum below)
hh. Plants rather sturdy.
i. 2—3 patent or differently turned, few-dentate lobes.
28. T. scotolepidiforme M.P.Chr.
ii. 4—7 patent—slightly hamate, often deeply dentate lobes.
29. T. divaricatum M.P.Chr.
dd. Anthers with pollen.
e. Fruit almost equally broad throughout, often very long, slightly spinous.
f. Plants small and slender. Leaves dark green. Terminal lobe long.
30. T. subnefrens M.P.Chr.
ff, Plants large and robust. Leaves dark-green, long. Terminal lobe often
very long.
31. T. spiculiforme M.P.Chr.
ee. Fruit broadest at the summit, + spinous.
f. Terminal lobe of the leaves large, roundish or lingulate-sagittate—hastate.
g. Terminal lobe roundish.
32. T. obovatifrons M.P.Chr.
gg. Terminal lobe lingulate-sagittate or hastate.
h. Petioles and midnerve pale—slightly coloured.
i. Leaves dark green. Plants rather sturdy. Head large, dark yellow. Outer
bracts dark olive-green, slightly margined.
33. T. macromerum M.P.Chr.
ii. Leaves fresh green—yellowish green.
j. All the teeth of the corollas orange-coloured. Plant vigorous. Leaves
broadest upwards. Outer bracts broad.
34. T. luteodens M.P.Chr.
jj. Teeth of corollas not orange-coloured. Outer bracts narrow with white
margins. Leaves lucid and plane.
35. T. planifrons M.P.Chr.
hh. Petioles and midnerve + purple-coloured. Terminal lobe of leaves often
distorted, one side longer than the other. Teeth of corollas very long.
36. T. pravicentrum M.P.Chr.