204 LICHENES ANTILLAEUM A W. E. ELLIOTT COLLECTI. 



island, and the introduction of cattle and importation of foreign 

 seeds would naturally add to their number. More precise observa- 

 tions on this point will be awaited with interest. 



Keturning to our own country, it would be instructive to observe 

 carefully whether the plant tends to extend itself or to die out in 

 the localities where it has already been recorded. If ultimately it 

 can be proved that it is an introduction, it might be very interesting 

 to notice whether it tends to vary in our country as it does in 

 America. The diagnoses given by Engler of the two most distinct 

 N. American forms are appended. This is done not with the object 

 of lengthening our catalogue of British plants, but to accumulate 

 records of varying forms which may eventually guide us to a better 

 understanding of the laws of variation. 

 J. TENUIS Willd. 



Var. ft. secxindus Engelm. ramis paniculfe spatham cxce- 



dentibus erectis incurvis ; floribus minoribus secundus. — 



J . secundus Poir. 

 Var. y. congesUis Engelm. ramis paniculfe quam spatha brevi- 



oribus abbreviatis ; floribus fere in capitulum congestis ; 



sepalis fusco-striatis ; capsula e stramineo fusca. 



LICHENES ANTILLAEUM A W. R. ELLIOTT COLLECTI. 



ExpoNiT Edv. a. Wainio. 



( Continued from p. 107.) 



Trib. 11. CcENOGONIEiE. 

 1. CoENOGONIUM. 



1. C. LiNKii Ehrenb. ; Wain. Etud. Bros. ii. 64. Ad ramulos 

 arborum in monte St. Andrews (2000 ped. s. m.) in St. Vincent 

 (n. 29). Fertile. 



2. C. Leprieurii (Mont.) Nyl. ; Wain. l. c. 65. Ad corticem 

 arborum in Richmond Valley in St. Vincent (n. 230 pr. p.). Fertile. 



Var. panniforme Wain. Thallus pannose expansus, adnatus aut 

 ambitu anguste liber. Apothecia in latere superiore sita. Ad 

 corticem arborum in Richmond Valley in St. Vincent (n. 230 pr. p.). 

 Cum C. interplexo Nyl., Quelq. Obs. Camog. 92, analogum, at in 

 C. Leprieurii transiens et cum eo crescens. Thallus flavescens aut 

 viridis aut stramineus, plagas ambitu partim rotundatas formans. 

 Gonidia 0-012-0014 millim. crassa. Fertile. 



Trib. 12. Gyalecte^. 

 1. Gyalecta. 



1. G. lutea (Dicks.) Tuck. Ad corticem arboris in Roseau 

 Valley in Dominica. 



2. G. microspora (Miill. Arg.) Wain. Ad folia arborum in 

 Dominica et in Bonhomme Woods in St. Vincent. Excipulum 



