NOTE TO STUDENTS 
To the Lichen Floras recommended to students in Part II. 
should be added Harmand’s ‘‘ Lichens de France, Paris, 1905-13,” 
still unfortunately incomplete, only five fascicles having been 
issued. Various groups of lichens—Orders, Genera, ete.—have 
been revised by modern lichenologists, and the results, when 
touching on British Lichens, have been freely used. The 
following are the more important :— 
Aumgutist, S., Monographia Arthoniarum Scandinavie. K. Svensk. Vet. 
Akad. Handl. xvii. n.6. 69 pp. 1879. 
BrRanpbt, THEopoR, Beitr. zur Anatom. Kenntn. Flechten-Gattung, 
Ramalina. Hedwigia xlv. pp. 124-58 (5 pls.). 1905-6. 
DaRBISHIRE, O. V., Die deutschen Pertusariaceen, etc. Engler’s Bot. 
Jahrb. xxii. pp. 593-671 (89 figs.). 1897. 
DARBISHIRE, O. V., Monographia Roccelleorum. Stuttgart, 1898. 
ForssELL, K. B. J., Beitr. Kenntn. Anat. Syst. Glelichenen. Noy. Act. 
reg. Soc. Sci. Upsal. Ser. 3. 118 pp. 1885. 
Frizs, Th. M., Monographia Stereocaulorum et Pilophorum. Upsala. 
76 pp. (1 pl.). 1858. 
Guiick, Huco, Entwurf zu einer vergleichenden Morphologie der 
Flechten-Spermogonien. Heidelberg, 1899. 
Hower, Huser, A Manual of the genus Usnea, etc. (North and Middle 
America). Bull. Torrey Bot. Club xxxvii. pp. 1-18 (7 pls.). 1910. 
Hower, Heser, American species of Alecturia, etc. Mycologiaiii. pp. 106- 
50 (7 pls.). 1911. 
Howse, Huser, Classification de la Famille des Usneacez dans L’ Amérique 
du Nord, etc. Paris, 1912. 
Hur, A., Lichenum generis Crocynia Massal., etc. Mém. Soc. Sci. Nat. 
Math. Cherb, xxxvii. pp. 223-54 (3 figs.). 1909. 
Hun, A., Lichenes Morphologice et Anatomice Disp. Genus xlviii. 
Aspicilia Massal. Nouv. Arch. Mus, Paris, Sér.5,ii. pp. 1-120, 1910. 
Hus, A., Causerie sur le Lecanora subfusca. Bull. Soc. Bot. Fr. 1. 
pp. 22-86. 1903. 
LerspaIn, Bounty pr, Recherches sur les Lichens des Environs de 
Dunkerque. Dunkerque, 1910. 
LynGu, Burnt, Monograph of the Norwegian Physiacee. Vidensk. Skrift. 
1. Mat.-Naturv. Kl. n. 8. 109 pp. (3 pls. 11 figs.). 1916. 
Rippie4, Linconrn Warn, The North American species of Stereocaulon. 
Bot. Gaz.1. pp. 284-304. 1910. 
ROSENDAHL, F'RrepRICH, Vergleichend-anatomische Untersuchungen tiber 
die braunen Parmelien. Abh. K. Leop.-Carol. Deutsch. Akad. 
Naturf. lxxxvii. n. 3. pp. 405-59 (4 pls.). 1907. 
SrrinbR, JuL1uS, Ueber die Funktion und den systematischen Werth der 
Pycnoconidien der Flechten, Festschr. Feier zweihundertj. Bestandes 
K.K, Staatsgymn. vili. Bez. Wiens. pp. 119-54. Vienna, 1901. 
Warnio, Eipv., Monographia Cladoniarum. Helsingfors, i. 1887; ii. 1894; 
iii. 1897. 
Zorr, W., Die Flechtenstoffe. Jena, 1907. 
