A CONSPECTUS OF THE LICHEN GENUS STEREOCAULON ...

21 8 Journ. Hattori Bot. Lab. No. 43 1977
FREY, Rabenhorsts Krypt.-F1. 9, Abt. IV, 1. Halfte: 141 (1932). - Stereocaulon evolutum var. Iaxum
(FREY) LAMB ex GRWM. Catalogus Lichenum Germaniae: 24 (1963).
Typus: Germany, Prov. Hannover, Giersfeld, "Granitblocke des Hunengrabes", leg. H. SANDSTEDE
1888 (M-ARN, holotypus; isotypes in herb. SANDSTEDE and in B, the latter destroyed in World War 11).
Exsicc. : HAV. Lich. Exs. Norveg. Fasc. VII (1905) no. 264, as St. evolutum (BG).
Icon.: FREY 1932, PI. I, fig. 6, as St. spissum var. laxum (holotype or isotype specimen).
Remarks: characterized by laxly caespitose pseudopodetia. Fairly common in western
Europe.
15. Stereocaulon glabrum (MULL. ARG.) VAIN.
Lichens, in: Res. Voy. Belgica, Botanique: 16 (1903); D. C. LINDS. Brit. Antarct. Survey Sci. Repts.
89: 50 (1974). - Stereocaulon alpinum var. glabrum MULL. ARC. Lichens, in: Mission Scientifique du
Cap Horn, 1882-1883, 5, Botanique: 151 (1889).
Typus: Chile, Magallanes, Hardy Peninsula, Orange Bay, leg. HYADES (G-~LL, holotypus).
Facultative synonyms: Stereocaulon patagonicum LAMB, Farlowia, 4: 454 (1955). - Stereocaulon
colensoi var. reagens RAS. Ann. Bot. Soc. Zool. Bot. Fenn. Vanamo, 2 (1): 24 (1932). - Pilophoron
colensoi var. reagens (RAs.) ZAHLBR. Catalogus Lichenum Universalis, 10: 381 (1939). - Stereocaulon
patagonicum f. reagens (RAs.) LAMB, An. Parques Nac. [Buenos Aires], 1958, 7: 99 (1959). -Stereocaulon
patagonicum f. subirregulare LAMB, Farlowia, 4: 456 (1955).
Icon.: ASAH. 1967, fig. 8. -LAMB 1955, fig. 21, as St. patagonicum; fig. 22, as St. patugonicum f.
subirregulare. - D. C. LINDS. 1974, PI. 111, fig. f. -VAIN. 1903, PI. 11, fig. 8.
Mat. chim. : the species occurs in two chemical strains.
Strain I, with atranorin, stictic acid and norstictic acid (the latter in low concentration).
The typical and common strain.
Strain II, with atranorin, norstictic acid and connorstictic acid (stictic acid absent). One
specimen only of this strain seen: Chile, Prov. Malleco, Dept. Angol, Parque Nacional de
Nahuelbuta, leg. M. MAHU, 1971 (no. 2320) (FH, USGO-MAHU).
Distrib. : Chile (Magallanes, Valdivia, Chiloe, Ayskn, Bio-Bio, Osorno, Malleco), Juan Fernandez,
Argentina (Tierra del Fuego, Santa Cruz, Chubut, Rio Negro, Neuqukn,) South Georgia, W. Antarctica
(South Shetlands) and Tristan da Cunha.
Remarks: specimens from the southernmost parts of S. America (including the type
specimen), and also from alpine locations further north, are mostly very reduced and depauperate;
the optimally developed state of the species occurs in Argentine and Chilean
Patagoaia, at comparatively low elevations (St. patagonicum LAMB). The taxa reagens RA~.
and subirregulare LAMB represent states somewhat less depauperated than the type material
of the species. The isolated occurrence in Tristan da Cunha is paralleled by the similar
distribution of another S. American species, St. implexum TH. FR., but in that case the insular
population is chemically different.
Fo. flabellans (LAMB) LAMB (n. comb.)
Basionym: Stereocaulonpaschale var. alpinum f.flobellans LAMB, Farlowia, 4: 457 (1955).
Typus: Argentina, Patagonia, Rio Negro, summit of Mt. Rigi near Lago Frias, altit. ca. 1750 m s.
m., leg. I. M. LAMB, 1950 (no. 5787) (CAN, holotypus; FH, isotypus).
Icon. : LAMB 1955, fig. 23, as St. paschale var. alpinum f. flabellans.
Remarks: known only from the type locality.
16. Stereocaulon glareosum (SAV.) MAGN.
Goteborgs K. Vetensk.- o. Vitterh.-Samh. Handl. ser. 4, 30 (7): 60 (1926); FREY, Rabenhorsts Krypt.-