10 NOTES OX A REHARKABLE LICHEN GROWTH, ETC. 



difference, that ceplialodia are growths upon and out of the 

 adult plant, while in the case of the phnnules the more mature 

 plant grows upon and out of them. 



In this latter respect they seem to serve much the same 

 purpose as the hypothallus of some plants. I refer again to 

 Nylander : "La couche hypothalline est la plus inferieure du 

 thaile. celle sur laquelle se stratifient les autres, mais ille n'est pas 

 toujour.s visible et manque dans beaucoup d'especes. Elle 

 precede dans la genese des lichens la formation des autres 

 couches thalliu'es, mais son developpement s'arrete souvent de 

 bonne heure, et elle est alors pen distincte ou disparait 

 entierement. Son tissu est filamenteux ou cellulare, et sa 

 couleur est le plus souvent foncee ou noiratre, d'autres fois pale, 

 mais rarement blanche," (Syn., p. 11). The plumule is 

 probably a homologue of the hypothallus ; but, while the tissue 

 of the hypothallus is either filamentose or cellular, the 

 plumule has also a gominic stratum and a cellular cortex 

 besides. 



In short, this is a new form of lichen growth, so far as my 

 observation or reading serves me. If any lichenologist has ob- 

 served any growth of the same or analogous nature, I should be 

 glad to compare notes and exchange specimens, in order that the 

 matter mav be thoroughly investigated. 



Descriptions of JSticta Stipitata and its Juvenile Form. 



iiticta stipitata, C.K., spec. nov. Thallus glauceous pallid 

 (when moist a bright green), here and there rufescent, moderate 

 in size cl-S inches high, and attaining sometimes 4 inches in 

 breadth), thin, somewhat rigid, scarcely shining, obsoletely 

 scrobiculate laciniato — lobate, lacinea? sub-pinnatifid, margins 

 sinuate and undulate, sinuses largish and round, apices often 

 broadly dilated and crenate. sometimes, deeply divided or even 

 laciniatule ; under surface pale fulvous, tomentose, tomentum 

 short, sordid, denser towards the base, which often ends in a stout 

 woody tomentose stipe. cyphell;» thelotremoid. 



