A CONSPECTUS OF THE LICHEN GENUS STEREOCAULON ...

I. MACKENZIE LAMB: A Conspectus of Stereocaulon 237
- Stereocaulon tomentosum f. truncatum FREY, Rabenhorsts Krypt.-FI. 9, Abt. IV, 1. Halfte: 185
(1932).
Exsicc. ANZI, Lich. Rarior. Venet. Fasc. I (1863) no. 19 (FH-TUCK, s). - ARN. Lich. Monac. Exs.
no. 334 (1894) (FH, PC). - BREUT. Flora German. Exs. Ser. 11, Cent. I1 (1843) no. 109 (FH, s). - BRITZ.
Lich. Exs. FI. Augsburgs Fasc. IV (1903) no. 149 (BM, FH. In PC with slight intermixture of St. incrustaturn
FLORKE); Suppl. V (1907) no. 787, as St. alpinum (BM, FH, M, PR). - CLAUD. et HARM. Lich. Gall.
praecip. Exs. Fasc. IX (1908) no. 423 (FH). - CLEMENTS, Crypt. Format. Coloradens. Cent. IV (1907) no.
306, as Stereocaulum [sic] paschale (co~o). - ELENK. Lich. Flor. Ross. Fasc. I (1901) no. 17, as St.
tomentosum var. campestre (FH). - FLAG. Lich. Franche-Compte' Fasc. VI (1884) no. 253, pr. p. (FH,
PC. Both mixed with St. dactylophyllum FL~RKE. FREY, 1932, p. 180, states the copy in G to contain also
St. alpinum LAUR.). -Flora Exs. Austro-Hungar. Fasc. VIII, Cent. XVI (1885) no. 1539 (PC, PR, S,
us). -Flora Hungar. Exs. Cent. I, Lichenes 6 (1912) no. 16 (PR, S, US). - FR. Lich. Suec. Exs. Fasc.
I11 (1824) no. 90 (FH-TUCK, S; isotype material). - FUNCK, Cryptog. Gewachse des Fichtelgebirg's,
Heft 1 (1801) no. 20, pr. p., as St. paschale (PR. Mixed with St. dactylophyllum FLORKE); ed. 11, Heft 41
(1838) no. 841, as St. tomentosum B. alpestre (BM, FH). -HARM. Lich. in Lotharingia no. 157 (date ?),
as St. tomentosum var. alpinum (FH). - HAV. Lich. EXS. Norveg. Fasc. VII (1905) no. 265 (BG). -
HEPP, Flechten Europas Band VI, Heft 11 (1857) no. 302, as St. tomentosum B. inciso-crenatum (FH-
TUCK, PC, s). - HOWE, Lich. Novae Angliae Decade 111 (lqll) no. 22, pr. p., as St. paschale (FH. Mixed
with St. saxatile MAGN.). - KAVINA et HILITZ. Crypt. Cech. Exs. Fasc. VI (1937) no. 273 (PR). -
Krypt. Exs. Vindob. Cent. XVII (1909) no. 1655 (FH, PC, WELC. In PR and s, with intermixture of St.
incrustarum FLORKE); Cent. XLII (1958) no. 4145 (BM, FH, s). - Lichenotheca Fenn. Fasc. XXXVIII
(1956) no. 935 (FH); Fasc. XXXIX (1956) no. 962 (FH); Fasc. XLVI (1958) no. 1140 (FH). - LOJKA,
Lichenotheca Regn. Hungar. Exs. Fasc. I (1882) no. 12 (FH-TUCK, PC, s). - MAC. Canad. Lich. ser. I1
(1909-12) no. 133, as St. paschale (the specimen from Ottawa) (DUKE); no. 134 (the specimen from Nova
Scotia, Cape Breton) (DUKE). - MALME, Lich. Suec. Exs. Fasc. XXVII (date ?) no. 651 (s). - NORRL.
et NYL. Herb. Lich. Fenn. Fasc. I1 (1875) no. 86 (FH-TUCK). - PETRAK, Flora Bohem. et Morav. Exs.
ser. 11, Abt. 2, Flechten (1924) no. 80 (FH, PR. In s it is referable to the var. compactum FREY). - Plants
of Wyoming, ed. Univ. of Wyoming, Laramie, no. 2690 (date ?) (co~o, us). - RABENH. Lich. Europ.
Exs. Fasc. V (1856) no. 133 (FH-TUCK, PR, s); Fasc. XVI (1859) no. 454 (PR, s). - RAS. Lich. Fenn. Exs.
Fasc. XI1 (1940) no. 570 (ups); Fasc. XV (1943) no. 736 (ups). - ROUM. Lich. Gall. Exs. Cent. VI
(date ?) no. 559 (ups). - SCHULZ, Flora Gall. et German. Exs. Cent. XI1 (1848) no. 1194, as St. tomentosum
var. /3. majus (M). - STENHAM. Lich. Suec. Exs. Fasc. I11 (1860) no. 79 (FH-TUCK, LD, US). - SUZA,
Lich. Bohemoslovak. Exs. Fasc. V (1930) no. 135 (PR). -TUCK. Lich. Amer. Septentr. Exs. Fasc. I
(1847) no. 23 (FH, L).
Icon.: AND. 1928, P1. XVIII, fig. 8. ERN., NADv. et SERV. 1956, P1. VI, fig. 4. - ELENK. 1906,
PI. 111, figs. 5-7. -FINK 1910, PI. 19. - FREY 1932, fig. 29a, b, c; PI. 111, fig. 7; fig. 8, as f. truncatum.
-HALE 1969, fig. 386. - KERSH. 1960, fig. 10. - MIG. 1927-31, Lief. 268-277 (1928), P1. 75, fig. 1. -
NEAR. 1947, fig. vii-8. - OKSN. 1968, fig. 147ax. - Oz. et CLAUZ. 1970, fig. 393. - RAs. 1951, PI. 11,
fig. 11. - SAT^ 1941, fig. 27.
Mat. chim.: atranorin, stictic acid, norstictic acid; possibly also constictic and consalazinic
acids. Working apparently with wrongly determined or mixed collections has given
rise to some discrepant statements: RAMAUT (1962) and RAMAUT and SCHUMACKER (1962)
reported the presence of lobaric acid. BRUUN (1973) reported lobaric acid and bourgeanic
acid (an aliphatic compound, known to occur in a few exotic Stereocaulon species) from a
Norwegian specimen of St. tomentosum, but a supposedly duplicate sample previously identified
by us failed to show either of these compounds.
Distrib.: boreal-montane-temperate, circumpolar but avoiding the high arctic regions, extending
20 Flora Romaniae Exs. Cent. X (1931) no. 905, as St. tomentosum, is Cladonia squamosa (SCOP.)
HOFFM. (s, US).