SriLankaLichens_Book_eng - page 11

11
16
Podetia ending in a
broad, regular cup, K+
yellow
Cladonia humilis
(With.)
J.R.Laundon
16
Podetia ending in
narrow, often irregular
cups, K- or K+ dirty
brown
Cladonia
fruticulosa
Kremp.
17
Medulla compact,
forming a central
chord which is easily
visible stretching the
thallus
18
17 Medulla not forming a
central chord 20
18 Medulla and central
axis always white, C-
Usnea cornuta
Körb.
18
Medulla and/or central
axis usually pink to
orange, C+ pale
yellow
19
19
Thallus greenish. With
a subcortical orange
pigment
Usnea subcornuta
Stirt.
19
Thallus reddish. With
a reddish pigment
extended to the central
chord
Usnea steineri
Zahlbr.