DIE FLECHTEX DER JUAN FERNANDEZ'INSELN 345 



§. Sporae biloculares St. carpoloma. 



§§. Sporae quadnloculares St. Mougeotiana. 



B. Gonidia palmellacea vel cystococcoidea (Eusti 



a. Thallus subtus cyphellis veris praeditus. 



I. Thallus stipitatus; medulla KIIO non tincta. 



1. Lobi thalli plus minus lineares St. lineariloba. 



2. Lobi thalli rotundati et latiores St. latifrons. 

 II. Thallus non stipitatus; medulla KHO sanguineo-rubens 



St. laciniata var. dcnudata. 



b. Thallus subtus pseudocyphellis praeditus. 



I. Pseudocyphellae albae. 



1. Receptaculum apotheciorum gonidia includens 



St. Frcycinetii. 



2. Receptaculum gonidiis nullis St. Richardi. 

 II. Pseudocyphellae luteae vel flavae. 



1. Receptaculum gonidiis destitutum; sporae incolores 



.S7. nit id a. 



2. Receptaculum gonidia includens; sporae plus minus obscu- 

 ratae, rarius decolores. 



a. Apothecia marginalia St. auraia. 



p. Apothecia superficialia 57. orygviaea. 



A. Sect. Stictina (Xyl.) Hue. 



S. argyracea Del. 



Del. Hist. Lich. Sticta, 1822, p. 91, tab. VII, fig. 3; Mont, apud Gay, Hist. 

 Fisic. y Polit. Chile. Bot, vol. VIII, 1852, p. 116; Hellb. in Bihang till Kgl. 

 Svensk. Vetensk.-Akad. Handl., vol. XXI, afd. Ill, no. 13, 1896, p. 29; Hue in 

 Nouv. Archiv. du Museum, ser. 4, vol. Ill, 1901, p. 87. — Lichen argyraeeus Bory 

 apud Del., 1. s. c. — Stictina argyracea Xyl., Synops. Lich., vol. I, i860, p. 334. 

 — Pseudocyphellaria argyracea Wain, in Hedwigia, vol. XXXVII, 1898, p. (34). 



Masatierra: Auf Baumrinden, ohne Standortsangabe (BERTEKO) Porte- 

 zuelo, 590—600 m, steril (C. und I. SKOTTSBERG). 



Masafuera: auf dem zentralen Hochplateau, bei 1,200 m, in einer Form 

 mit etwas breiteren Lagerabschnitten (C. und I. SKOTTSBERG). 



var. *sorediifera Del. 



Del. Hist. Lich Sticta, 1822, p. 92, tab. VII, fig. 31. — Stictina argyracea 

 var. sorediifera Xyl., Synops. Lich., vol. I, i860, p. 334. — Pseudocyphellaria argy- 

 racea var. sorediifera Helib. in Bihang till Kgl. Svensk. Vetensk.-Akad. Handl., vol. 

 XXV, afd. Ill, no. 6, 1899, P- 2 A- 



Masatierra: Puerto Frances, 500 m, fruchtend (C. und I. SKOTTSBERG). 



