THE HIGH ALPINE FLORA OF BRITAIN 165 



"Trans. Proc. Bot. Soc. Edin." xiii. 95). Balfour's specimens are 

 :actually dated August 25, 1847. 



The plant occurs in bare places on alpine ridges on Ben Lawers 

 between 946-1022 m., and up to 1060 m. on Ben Ein (Messrs. 

 Marshall and Hanbury, ex "El. Perthsh." 86). On bare rocks near 

 the summit of Ben Lawers (R. Lindsay, in " Trans. Proc. Bot. Soc. 

 Edinb." xxi. 104 [1898]) — this is much higher than the level given 

 in "El. Perthsh." Ben Lawers ("Herb. Kew." dated 1864), and 

 up to 1000 m. (P. Ewing, 1901). 



91. Cerastmm triviale^ Link, var. alpimim, Mert. & Koch, in 

 Rohl. "El. Deutschl." ed. 3, iii. 336 (1831). — Ascends to 1067 m. 

 ■on Ben Ein (E. S. Marshall, 1889, in Herb. Brit.) in dry places. 

 Ascends to iioo m. on the Grampians of Aberdeenshire (Watson in 

 Herb. Kew.). This is a variety with larger flowers and longer 

 fruit. Probably the form which is found at 946 m. on Carn Tual 

 (H. C. Hart) also belongs here. 



Syn. — C. fojitaiium, Baumg., " Enum. Stirp. Transsilv." i. 425 

 (1816); C. triviale, \2ir. alpestre, Hegetschw., "El. Schweiz," 436 

 (1840); C. vulgatum, var. a/phmm, Grenier, " Monogr. Cerast." 40 

 (1841); C. imlgatum^ var. ^ alpinum, et var. y macrocarpum, Eenzl 

 in Ledeb., "El. Rossica," i. 409 (1842); C. macrocarpiim^ Schur, in 

 "Verhandl. Naturf. Ver. Siebenb." ii. 177, nomen solum (185 1), 

 I.e. X. 131 (1859); C. longirostre, Wichura, in "Jahresber. schlesisch. 

 Gesell." xxxii. 75 (1854); C. alpestre, Schur, in "Verhandl. Naturf. 

 Ver. Briinn," xv. 1876, ii. 151 (1877); C. triviale, var. fontaniun^ 

 Rouy et Eouc, "El. de Erance," iii. 207 (1896); C. triviale., var. 

 longirostre, Groves, in Bab., "Man. Brit. Bot." ed. 9, 65 (1904). 



The following description (varietal characters only) is adapted 

 from Eenzl : — Dense ac longe pilosum latifolium, pilis rigidulis 

 patentissimis quandoque ferrugineis hirsutissimum. Turiones 

 plerumque plures adscendentes elongati ramosi polyphylli. Caudi- 

 culi simplicissimi baud vel vix fasciculiferi, cauliculis validis. Eolia 

 turionum caulinaque infima lanceolata ; reliqua lata oblonga vel 

 ovata. Cyma 3-10-flora. Calyx 8-10 mm. Petala oblongo- 

 •cuneata, ungue glabra vel interdum subciliata. Capsula (in forma 

 longirostrata) demum ad 16-20 mm. 



92. Cerastmm alpinum^ L. — On grassy alpine slopes and rocks, 

 ascends to the summit of Ben Lawers (" El. Perthsh." 81). Northern 

 precipices of Cairn Gorm, at 1160 m. (A. Ley, 1874, in Herb. 

 Brit.). It is found on mica-slate rocks on most of the higher 

 Scottish mountains (Syme, "Engl. Botany," ii. 85). Ben Ein at 

 1006 m. and upwards (E. S. Marshall, 1889, in Herb. Brit.). I 

 am unable to separate frofn the type C. lanatiwi, Lamk., " Encycl. 

 Meth." i. 680 (1783), C. pilosum, Horn., " Hort. Hafn." add. 965 

 (1819), C. latifolhi77i (non L.) Lamk. I.e. (1783), C. villosiun 

 Baumg., "Enum. Stirp. Transsilv." i. 424 (1816), C. alpinum., var. 



