A CONSPECTUS OF THE LICHEN GENUS STEREOCAULON ...

land".
I. MACKENZ~E LAMB: A Conspectus of Stereocaulon
St. corallinum c. stigmateum RABENH.
Deutschlands Kryptogamen-Flora, 2, 1. Abt., Lichenen: 112 (1845).
Typus: Switzerland, Susten, leg. SCHAERER; not seen by us. The description, "mit
schwarz punktirten, kornigen Schuppchen", indicates a state infested by a parasymbiontic
fungus. To be rejected (Int. Code Art. 70).
"Stereocaulon globosus (HuDs.) VAIN."
This name is given to nos. 27 and 87 of ANDERS'S exsiccat Lich. EXS. Bohem. Bor. The
former is St. saxatile MAGN., the latter a mixture of St. evolutum GRAEWE and St. tomentosum
var. compactum FREY. The combination is not mentioned in ANDERS'S book (1928), and
we cannot trace it to VAINIO. It is probably merely a lapsus due to confusion with a name
applied to a species of Sphaerophorus, and should be rejected and ignored.
St. par vifolia
A nomen nudum without indication of author, mentioned on pages 313 and 480 of H.
B. DAVIS, "Life and Work of Cyrus Guernsey Pringle" (1936), referring to a specimen numbered
414 collected by PRINGLE in Mexico. Dr. F. SEYMOUR, Assistant Curator of the PRINGLE
Herbarium (VT) informed us in litt. 1967 that no specimen with this name could be found in
their collect ions.
St. paschale ,B. conglomeratum FR.
Schedulae Criticae de Lichenibus Exsiccatis Sueciae, Part 111: 20 (1825).
Typus: Sweden, no exact locality. The isotype material is FRIES, Lich. Suec. Exs. no. 89.
This is not homogeneous; some examples, as in FH, are St. evolutum GRAEWE, others, as in
LD and UPS, a mixture of St. evolutum and St. paschale (L.) HOFFM., and yet others, as in
s, entirely St. paschale. The original description does not give much clue as to which of these
species FRIES had in mind, but probably mostly St. evolutum. TH. FRIES (1865, p. 181) also
stated that Lich. Suec. Exs. no. 89 is a mixture, partly consisting of St. evolutum; FREY (1932,
p. 149) states that it contains also St. subcoralloides (NYL.) NYL. In FRIES, Lichenographia
Europaea Reformata: 202 (1831) the same taxon is referred to as St. paschale b. minus FR.;
the word "conglomeratum" forming the description; reference is made to the original Sched.
Critic. publication. TH. FRIES (1857, p. 17) made the combination St. coraZZoides [var.] P.
~onglomeratum (FR.) TH. FR., referring to FR. Lich. Europ. Reform. p. 202, and hence to
St. paschale p. conglomeratum FR. as basionym. In Lichenogr. Scand. (1871) TH. FRIES
refers to the taxon in 2 places: on p. 44 as St. coralloides P. conglomeratum, using it in the sense
of St. subcoralloides (NYL.) NYL., and on p. 47 as St. paschale E. conglomeratum. ZAHLBRUCK-
NER (1926-27, p. 667) lists St. coralloides P. conglomeratum as a synonym of St. subcoralloides.
Finally, VAINIO (1940, p. 10) made the combination Stereocaulon conglomeratum ("TH. FR.")
VAIN., and applied it to St. subcoralloides. We subscribe to the opinion of MAGNUSSON
(1926, p. 51) that the epithet conglorneratum is so thoroughly confused in its application
that it should be dropped entirely. To be rejected (Int. Code Art. 69).
St. paschale ,B. conglomeratum 1. robustum FLOT.
Bot. Zeitung (Berlin), 8: 537 (1850).
A nomen nudum; the only observation given is "Curie et Breutel Herb. No. 141. Gron-
land."