Fróðskaparrit - 01.01.1954, Side 120

126
Viðbót til Hieracium-gróðurin
by efloocose a;id more densely glandular involucres and long-
tootihed ligules.
Tridentata. H. nannocaulon n. sp. (vide pag. 120)
belongs undoulbtedly to t'he Section Tridentala and it
is closely allied to II- epileucoides Dahlst. It is mainly distin-
guished from tlhat sipecies by having mudh lower stem, bright green,
duraible and densely placed radical leaves, no lieaves (only ibraots)
about the upper half of the stem, and by less 'hairy involucres and
shorter teeth of the ligules. In the 'H. naninocaulon material I found
3 specimens somewhat different from the type. Whether they be-
long to another niew sipecies of Tridentata or they are referable
as a variety to H. nannooaulon I cam not rstate because of too sganty
material. These specimens have 2—3 radical leaves, 3—5 fairly well
develo-ped stem-leaves and longer teeth of the ligules. They remind
one of a new Ioelandic species: H. hologlossum Q-karss. from
S.E.-Iceland, hut they can noit 'be rieferred to it.
Hieracium stictoplwrum n. sp. ((vide pag. 121). Of this
species only one specimen with undeveloped flowierheads is
available. But as it has distinct features, I think it reason-
aible to descrihe it. //■ stictopkorum is characterized by nelatively
large purplish-brown-blotdhed radical leaves, one small stem-leaf,
fairly densely pilose and glandular peduncles and by coipiously
microglandular involucres. The systematic place of this plant is
not pierfeotly clear, Ibut I think tihat it is in closest relation wilh
Tridentata, to which Section I provisionally refer it. Among Faero-
ese species it comes nearest to H. epileucoides Dahlst., but that
species presents some essential points of difference from H.
stictop'horum e. g. as to the foliage and the indumentum of the in-
floresoeinoe. iBnitiish and Icelandic Tridenitata spegies also differ
widely from ithis new form.
Alpestria. H. scolophyllum m. isp. (vide pag. 122), is
undoubtedly closely allied ito the Semidovrensia species
H. Hartziamum Dahlst., but it differs from i,t in several
particulars. Radical leaves are all acuminate—isubulate, never
oibtuse, without stellate hairs and more densely pilose on their
surfaces; ,the inflorescence is more Qon+racted, wiith much shorter
acladium, lower and more floccose involucres and darker styles.
Hieracium Hartzianum. Dahlst. var. heteroglochin nova v. (vide
p. 123). 3 specimems of this form from same locality are ait hand,
and these are of fairly different appearance. Judging from their
general facies wie might think that they were an intermediate form
between H. Hantzianum Dalhlst. and H. Ostenjeldii Dahlst. But