SYNOPSIS. 5 
Tribe VI. CLADONIEI Ny]. Thallus foliaceous or fruticulose, 
with fistulose podetia: apothecia terminal on the podetia, rarely 
sessile on the basal thallus, biatorine. 
3; Pycnothelia Duf. Thallus _granuloso-crustaceous, podetia 
clavate, papilleform, glabrous: apothecia brown, with simple spores; 
spermogones with simplish sterigmata and curved spermatia. : 
32. Cladonia Hill. Thallus foliolose or squamulose; podetia 
branched or scyphose,' pulverulent and squamose: apothecia brown 
or scarlet, with simple spores; spermogones with simplish sterig- 
mata and cylindrical straight or somewhat curved spermatia. 
33. Cladina Nyl. Thallus leafless ; podetia ascyphous, branched, 
smoothish: apothecia brown, with simple spores ; spermogones with 
simplish sterigmata and straight or usually curved spérmatia. 
Series II]. RAMALODEI Nyl. Thallus efoliolose, fruticulose 
or filamentose : apothecia generally lecanorine or parmelioid. 
Tribe VII. ROCCELLEI Nyl. Thallus simplish or branched, 
internally with filamentose medulla: apothecia often irregular, 
adnate, terminal or lateral. 
34. Roccella DC. Thallus fruticulose from a common base: 
apothecia normally lecanorine, blackish, with 3-septate spores ; 
spermogones with simplish sterigmata and arcuate spermatia. 
Tribe VIII. SIPHULEI Nyl. Thallus podetiiform, simple or 
fruticulose, internally with filamentose or fistulose medulla: apo- 
thecia not rightly known. 
35. Thamnolia Ach. Thallus subulato-stipitate, internally fistu- 
lose: apothecia unknown ; spermogones with jointed sterigmata and 
cylindrical, slightly apically incrassate spermatia. 
Tribe IX. RAMALINEI Nyl. Thallus fruticuloso-foliaceous, 
rounded or compressed, with woolly medulla: apothecia lecanorine, 
scutellate. / 
36. Ramalina Ach. Thallus ramoso-laciniate, medulla arach- 
noid: apothecia terminal or lateral, subconcolorous, with 1-septate 
spores ; spermogones with pauci-articulate sterigmata and straight 
cylindrical or oblongo-cylindrical spermatia. ; 
Tribe X. USNEEI Nyl. Thallus very much branched, rounded 
er compressed, with firm medullary axis: apothecia parmelioid, 
peltate. 
