450 FLORA ANTARCTICA. \Fuegia, the 



Hab. Falkland Islands ; on dead stems of Roslkovia grandiflora. 



Puncta irregularia suborbicularia picea nitida in culmos exsiccatos efformans. Perithecia valde depressa, 

 demum basi squama? instar dehiscentia. Spora irregulares, fusiformes, quandoque curvatee, tenerrimse, albae, 

 pellucidse ; endochromium varie partitum, non autem septatum. 



A species which, examined superficially, may be passed over as Leptodroma junceum, differing merely in its more 

 sinning perithecium. The spores are, however, of a very different form, and many times larger. In that species, 

 as published in 'British Fungi' (No. 197), and by Madame Libert (No. 260), they are extremely minute and 

 obtuse at either extremity ; the perithecium also is more closely cellular. In the specimens published by Klotzsch 

 and Fries (in my copy at least), there is no fructification. It resembles also, externally, Leptodroma vulgare, but 

 there is as decided a difference as in the former case between the spores. 



Plale CLXIII. Fig. III. — Leptothyrium decipiens, Berk., of the natural size ; 2, portion of stem of Rodkovia 

 grandiflora, with base of peridium adhering to it : — magnified; 3, spores : — highly magnified. 



10. SPH.ERONEMA, Fries. 



1. Sph^ronema sticticum, Berk.; minutissimuin, punctiforme, innatum, atrum, uitidum, demum 

 collapsuin, sporis minutissimis ellipticis. (Tab. CLXIII. Fig. I.) 



Hab. Hermite Island, Cape Horn; on dead leaves of the Deciduous Beech (Fagu-s Antarctica.) 



Minutissimum, punctiforme, atrum, nitidum, demum collapsum, praecipue venis foliorum innatum, unde disposi- 

 tionem reticulatam exhibit. Spora minutissimee, sporophoris brevibus filiformibus affixas. 



Not to be confounded with Spharia punctiformis, Pers., (Fr. Sc. Suec. No. 56), which has true asci, assuming 

 the production published by Fries, which exactly accords with specimens gathered in Northamptonshire, to be 

 the type of the species. Both Desmaziere's (No. 984), and Mougeot's, and Nestler's (No. 662) plants appear to 

 me quite different. Unfortunately in neither have I been able to detect fructification. In Mougeot's plant the 

 perithecia are strongly collapsed, which is by no means the case with that of Fries ; and that of Desuiaziere 

 approaches Sp. macidaformis. 



The genus Spharonema is here considered as comprising such species of the genus Sptiaria as have simple 

 spores, never included in asci, such as Sp. acuta, &c. 



Plate CLXIII. Fig. I. — 1, Spharonema sticticum, Berk., upon leaves of Fagus, of the natural size ; 

 2, portion of leaf and fungus ; 3, spores on their sporophores; 4, spores : — all highly magnified. 



11. SPOBIDESMIUM, M: 



1. Sporidesmium adscendens, Berk., in Ann. Nat. Hist. vol. iv. p. 292. t. S. f. 1. 1810. 



Hab. Falkland Islands ; on the underside of Polgporus versicolor, C. Darwin, Esq. 



The species is nearly allied to Sp. vagmn, Nees, from which it differs merely in having constantly a single 

 globose nucleus in each articulation, presuming that Corda's figure, published in the same year with that in the 

 Annals of Natural History, is the plant of Nees. 



12. jECIDIUM, Gmel. 



1. jEcidium Magellanicum, Berk.; hypophyllum, totam faciem inferiorem occupans inque petiolos 

 sparsum, rarissime epiphyllum, maculis rubellis, peridiis urceolatis elongatis, sporis pallidis irregulariter 

 orbicularibus. (Tab. CLXIII. Fig. II.) 



Hab. Strait of Magalhaens ; Port Famine; on Berheris ilicifolia, Cajd. King. 



