RocceUa j i. Ma oli< henhb < Wainio). 
ant parcc ourvatss. Thallas rigidus, volgo teres, I ad 0*7 mm 
Medulla j'><l<> cserulesoenB 
R. Gayana Mont. (Darb., , p W) medulla jodo baud < 
i tballua neque KHO nee CaCI gone) a R. hypomecha differt 
l. R. tuberculata Wain., sp. n. 
/,'. Canariemis Darb., Mon. Rocc. p. 50 pr. p. I peciminn 
sorediosa ). 
Tballua rigidus, long. 30 ad 80 mm., basin \ .3 ad 
0*7 nun., livido-albescens, pallescens aul fuscoscens, epruinosus, 
soraliis tuberculiformibus aut saltern margine elevatia instr 
Deque Kilo. nee CaCl s O reagens, dichotome repetito-rai 
i-ainis teretibus. Medulla alba, jodo leviter caerulescens. 
I\-. Capitis Viridis. Ad rapes in insula Fogo leg. Pharn 
Torres. No. 419. sum-. 
Var. Vincentiua Wain. 
Thallo passim leviter pruinoso el sorabis CaCljOj rubentibus a 
R. tuberculoid differt, al forsan non est autonoma species. I 
nun thallus neque KHO nee < !al '!..<>_■ reagens. Medulla alba, 
|odo i serulescens. Soralia elevata. 
In-. Capitis Viridis. Bine tnde ad rapes maritimaa Lnsnlse S. 
Vincentii. No. 402 pr. p. 
5. R. Mossamedana Wain., sp. n. 
Thallus livido-pallescens aul albidus, soraliis cinereis, hand aut 
\i.\ elevatis instructus, Kilo rubescens, CaCljOa non r 
rigidus, long. circ. 25 ad 30 nun., basin versus era--, circ. 
0*7 nun. crebre dichotome repetito-ramosus, ramis teretibus. 
Medulla alba, jodo haud reagens. 
Mossamedes.— Ad rupee in summia jugis Serrade Montes v 
NTo. 418 Ster. 
6. R. Arnoldi Wain. 
/,'. linctoria Darb., I.e., p. 32 pr. p. (specimina sorediosa); An... 
Lich. Kxs. ,,. 1689. 
Thallus rigidus, ramis teretiusculis, passim levissime pruinosus, 
sorediosus, glaucescens aul fuscescens, Kilo oon reagens, < a< l < » 
rubescens, etiam soralia CaClgOg rubescentia. Medulla basis el 
placentas alba, jodo caerulescens. Malum similis esl /.'. 
(Dicks.) Wain. (Lichen fucoides hicks.. Crypt. Fasc. ii. 1790, 
p. 22, secund. specim. authent. in herb. Ach. ad R. phycopsin 
Darb. vel R. phycopsin Ach.. [ich. CTniv. 1810, p. 440 pr. p., 
spectat), at colore medullae placentae ab ea differt, reactionibus, 
!\ 1 1( 1. 1 ',( '|_,( i s el jodo product is, cum ea congruous. In /.'. difficili 
Darb., Ix., p. 49, thallus KHO non reagens, CaCl s O a leviter 
i nbesci us. soralia < !a< 'l..< >s non reagenl ia, medulla jodo caeru l< 
I Q R. i 'aribcea I >arb., l.c., p. 53, thallus neque Kilo nee < !a< 'I I ' 
reagens, soralia CaCl 2 2 rubescentia, medulla jodo caerulescens. 
/,'. Arnoldi tantum sterilis esl cognita, at saltern thallo soredioso 
a R. tinctoria differt. tn RocceUia, sicut in speciebus plurimis 
lichenum, praesentia et absentia soralium nota est valde constans. 
