A CONSPECTUS OF THE LICHEN GENUS STEREOCAULON ...

I. MACKENZIE LAMB: A Conspectus of Stereocaulon 203
no. 264, as St. alpinum B. botryosum (FH-TUCK, PC). - THOMS. Lich. Arct. no. 37 (1960) (WIS). -
TREV. Lichenotheca Veneta, Ser. I, Fasc. IV (1869) no. 144 (ups), - V~ZDA, Lich. Sel. Exs. Fasc. XXXIX
(1971) no. 964 (FH, LD). - WARTMANN et SCHENK, Schweizer. Kryptog. Cent. I, Fasc. I1 (1862) no. 51
(FH).
Icon. : ANDERS, 1928, PI. XVIII, fig. 10. - FREY, 1932, fig. 25; PI. 111, fig. 5. - MIG. 1927 - 31,
Lief. 268 - 277 (1928), PI. 74, fig. 1. - CERN., NADV. et SERV. 1956, PI. VI, fig. 5. - SCHENCK, 1914,
PI. 29 a, b (field photograph). - POELT, 1969, PI. 3, fig. 13. - OZENDA et CLAUZADE, 1970, fig. 394 A,
B, C. - DAHL et KRoG, 1973, fig. 49. - HENSS. et JAHNS, 1974, fig. 13.14~.
Mat. chim.: atranorin, lobaric acid, B-sitosterin. Occasionally lobaric acid apparently
absent or in too low a concentration to be demonstrated by present chromatographic techniques.
H. KRISTINSSON (in litt.) reports an Icelandic specimen allegedly containing atranorin,
lobaric acid and stictic acid7. A polyol compound, "Stereocaulit", described by
ZOPF (1907); this shown to be identical with D-arabitol ("arabit") by HUNECK, FOLLMANN
and REDON (1973).
Distrib.: More extensive than that of St. paschale, and penetrating further polewards than that
species. Sweden, Norway, Finland, France, W. and E. Germany, Switzerland, Austria, northern
Italy, Czechoslovakia, Hungary, Poland, Bulgaria, U. S. S. R. (Siberia, Murmansk region, Ural Mts.,
Caucasus, Transbaikalia, Novaya Zemlya, Franz Josef Archipelago, Extreme Orient, Kamtchatka),
Mongolian People's Republic, Iceland, Spitsbergen, Greenland, Jan Mayen, Canada (N. W. Territ.,
Yukon Territ., British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Newfoundland,
Labrador), Miquelon Island, U. S. A. (New Hampshire, Vermont, Colorado, Wyoming, Montana,
Oregon, Washington, Alaska), Korea, northern India, Pakistan, Peru, Chile (Cautin, Aiskn, Magallanes),
Argentina (Rio Negro, Santa Cruz, Tierra del Fuego), South Georgia, Antarctic Peninsula.
Unconfirmed literature records also from Belgium (DE WILDEMAN and DURAND 1898 - 1907 (1898)),
Rumania (MORUZI, PETRIA and MANTU 1967), China (ZAHLBRUCKNER 1934), Hawaii (MULLER ARG.
1889), and Central Africa (ZAHLBRUCKNER and HAUMAN 1936, erroneous, referring to St. nigromaculatum
DUVIGN.).
Remarks: DAHL 1956, p. 359, gives an instructive analysis of the morphological,
physiological and ecological differences between St. alpinum and St. paschale (L.) HOFFM.
KLEMENT (1959) distinguishes in northern Lapland an association named the Stereocauletum
alpinum, dominated by St. alpinum and including also St. paschale (L.) HOFFM. and St. tomentosum
FR.
Fo. platycladum FREY
ex POELT, Bestimmungsschliis~e1 Europaischer Flechten: 647 (1969).
Typus: France, Dauphine, La Bkrarde, Vallon du Veneon, "graviers silicieux, alluvions", leg.
E. FREY and A. SCHMIDT, 1932 (no. 2513) (FREY, holotypus; FH, isotypus).
Remarks: material referable to this form has been seen also from Finland, Switzerland,
U.S.A. (Colorado), Canada (Alberta, Saskatchewan) and Greenland.
Var. erectum FREY
Rabenhorsts Krypt.-F1.9, Abt. IV, 1. Halfte: 164 (1932); Ber. Schweiz. Bot. Ges. 69: 196 (1959); MAGN.
Bot. Not.: 469 (1934). - Stereocaulon paschale var. erectum (FREY) LAMB ex LLANO, J. Wash. Acad.
Sci. 41: 197 (1951).
Typus: Switzerland, Canton Graubiinden, Sarnaden, altit. 1725 m s. m., "Kies- und Sandalluvi-
Dr. KRISTINSSON
later (in litt. 1976) informed us that this result is not quite certain, since it is
possible that the material extracted may have been contaminated by St. tomentosum FR.