The Botany of Iceland - 01.12.1942, Side 33
THE TARAXACUM-FLORA OF ICELAND
259
i. Leaves with 3—5 narrowly deltoid, tapering, subulate, strongly reflexed
lobes. Pyramid of fruit very long and narrow, 1.0—1.2 mm long. Terminal
lobe sagittate, strongly tapering.
48. T. oxyþhoreum M.P.Chr.
ii. Leaves with 2—3, patent or hamate, narrow, acute lobes. Terminal lobe
of the leaves often long and distorted, with one side longer than the
other.
49. T. þravum M.P.Chr.
dd. Petioles purple-coloured.
(See Eu-Sþectabilia)
bb. Rufescentia. Fruits reddish—bright reddish-brown.
c. Outer bracts 3—5 mm broad, ovoid, appressed, dark-green with a white margin.
Leaves long and narrow with a pale petiole. Flowers female. Fruits rather broad
with a short pyramid.
50. T. Davidssonii M.P.Chr.
cc. Outer bracts 2—3 mm broad, bright green, clear- or red-margined. Fruit often
narrow.
d. Leaves with narrow, linear, hamate lobes. Fruit finely spinous above and with
broad, conic pyramid 0.3—0.4 mm long.
51. T. hamidens M.P.Chr.
dd. Leaves deltoid, lobed or entire and dentate.
e. Leaves lanceolate. Lobes deltoid, patent.
f. Fruit long and narrow, almost everywhere densely spinous or warty.
52. T. isolobum M.P.Chr.
ff. Fruit only spinous above. Spines few, long and acute. Pyramid 0.6—0.8
mm long.
53. T. reþletum Dahlst.
ee. Leaves lingulate-lanceolate, entire and dentate—shallow-lobed. Fruit long
and narrow, fusiform, slightly spinous above.
54. T. rufescens M.P.Chr.
Maculata.
5. Taraxacum espinulosum M.P.Chr. n. sp.
Spec. orig.: Iceland, Laugarna at Reykjavík, 9.VII.1935, leg. M. P. Christiansen.
Plate I, fig. 5. Plate XVI, fig.'134.
Planta 20—30 cm alta. Folia cano-viridia—glauco-viridia, exteriora superne +
atropurpureo-maculata, glabra—parce araneosa, lanceolata—anguste lanceolata, 3-5-
loba, lobis subapproximatis—distantibus basin versus perlatis, + brevibus, deltoideo-
patentibus, apicibus interdum hamatis vel porrectis, acutis—acuminatis, antice +
concavis, integris—parce denticulatis, interdum dentibus magnis solitariis instructis,
interlobiis latis, brevibus—sat longis, integris—parce denticulatis, lobo terminali parvo
—mediocri, triangulari—sagittato-hastato, saepe integro, interdum in apicem +
longum + acutum contracto, petiolis latis—subangustis, pallidis, nervo mediano
pallido—leviter rubescenti.
Scapi pallidi— + colorati, glabri.
Involucrum dilute viride, apice atroviridi, squamis exterioribus, 4—2 mm latis,
11—14 longis, ovato-lanceolatis—linearibus, sensim acuminatis, laxe patentibus—■
+ recurvatis, supra dilute viridibus + laete purpureis vel + purpureo-marginatis,
+ glaucescentibus, subtus dilute olivaceo-viridibus, + albo-(vel purpureo-)marginatis
et interioribus ecorniculatis.
Calathium c. 45 mm latum, sat obscure luteum, planum, leviter radians, ligulae