340 BOTANY OF SOCOTRA. 



b. var. laevis, Miill. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 457. 



Thallus ut in var. pra?cedente sed Itevis v. vix spurie gibboso-rugosus, superficie nudus, oliva- 

 ceo-nigricans, pariter parvulus. Sporoe 21-24 fi longa?, 7-8 fj, latae. 



Ehec thallo laevi-aequali extus ad S. japonicum, Miill. Arg. (L. B. 131), accedit, sed thallus multo 

 minor, obscure tinctus et sporre prsesertim alice. 



Socotra. Crescit cum var. praecedente. Schweinf. 

 Distrib. Endemic. 



c. var. subfurvus, Miill. Arg. in. Proc. Eoy. Soc. Edin. xi. (1882), 457. 



Thallus paullo major, lobi magis adscendentes et subundulati, lsevi-aequales v. hinc inde parce 

 et irregulariter plicato-rugosi v. undulato-plicati, superficie demum plus minusve copiose 

 furfuracei, vulgo steriles. 



Habitu undulato-lobato subcsespitoso et superficie Collema furvum, Acb. simulat, sed minus 

 rigid ulus. 



Socotra. B.C.S. n. 1446 (substerilis). Crescit commixtim cum duabus 

 varietatibus praBcedentibus in ramulis Rhoidis, et in monte Sclieheli supra 

 Tamarida alt. 1250 m. Schweinf. 



Distrib. Endemic. 



2. LEPTOGIUM. 



Leptogium, Stitzb. Beitr. 144. 



Leptogium et Mallotiuvi, Mass. Mem. 95 ; Korb. Syst. Par. 



Lcptoyiuvi, Nyl. Syn. 118. pr. p. 



A pretty numerous genus dispersed over all temperate and hot regions ; 

 some species are exceedingly common in tropical and subtropical countries. 



1. Leptogium diaphanum, Nyl. Syn. p. 125. 



Socotra. Ad Scheheli alt. 1250 m. (sterile). Schweinf. 



Distrib. Widely-dispersed but not common, usually mixed with other 

 lichens or with mosses ; I have it also from Cuba, New Granada, Ascension, 

 Mauritius, Ceylon, and Australia. 



2. Leptogium (Mallotium) Menziesii, Montgn. Chili, p. 223. 



Rhizinse horum specimiuum, et aliorum herbarii mei, ejusdem longitudinis suntac in L. Hilden- 

 brandti, Miill. Arg. 



Socotra. In monte Scheheli alt. 1250 m. (sterile). Schweinf. 



Distrib. On the mountains of South America, Cape of Good Hope, in the 

 higher (not cold) regions of the East Indies, in China and Java at an elevation 

 of 7000 feet. 



