280 



PLGKA OP NEW ZEALAND. 



[Lichenes. 



is very wide) see my remarks in Dr. Seemann's work. It is the one species of this group occurring in Europe, and 

 there only in Ireland and the Azores. 



15. Sticta sinuosa, Pers.; "thallo glauco lsevi subtus fuscescente profunde diviso laciniis subdiscretis 

 sinuosis, scutellis submarginalibus dilute badiis." — Pers. in Freyc. Toy. p. 200. Brest, Bepert. Sot. p. 91. 

 Mont. ! in Hook. Bond. Journ. of Bot. v. 4s. p. 6. 



Var. papyracea, Bab. ; thallo lmmecto Isete viridi tenuiore, apotheciis minoribus sparsis dilute rubris. 



Hab. Northern and Middle Islands, Colenso, Lyall. 



A troublesome form, varying a good deal in the breadth of the segments and in the colour. I am not fully 

 convinced that it is distinct from S. dammcomis, from which, however, the sinuous, less corniculated ramification 

 appears to separate it. The cyphellee are large and explanate. 



16. Sticta variabilis, Ach., Lich. Univ. p. 455 ; thallo cartilagineo prostrate laciniato, lobis linearibus 

 furcatis crenulatis apicibus fissis tenuiter dissectis, supra leevi pallido glauco ochraceo in humido virescente, 

 subtus tomentoso ad centrum fusco-nigricante in ambitu ochroleuco, cyphellis urceolatis pallidis, apotheciis 

 submarginalibus disco fusco-rubro margine prominulo. — Delise, Sticf. p. 119. t. 11. f. 48. A. Rich. Flora. 



Hab. Northern and Middle Islands, on bark, Colenso, If Urville, Sinclair. 



Dr. Sinclair's specimen agrees well with an authentic fragment of Sticta variabilis, Ach., found in Bourbon by 

 Bory, preserved in the Hookerian Herbarium, and communicated by Dr. Montague ; in Dory's specimen, however, 

 the under side is darker, the cyphellee are less pure white, and the lobes somewhat shorter. These differences are of 

 very little moment, especially in a species which, as its name implies, is given to considerable variation. Bory's 

 remark, given in Acharius (to whom it was unknown), is excellent : — " Elegans, laciniis lobatis lsete virentibus, mar- 

 gine circumcirca delicate dissectis quasi Jungermannia furcata." Delise's figure is either very bad, or expresses a state 

 of the plant very different from such as I have seen. The colour in Bory's and Sinclair's specimen is glaucous green, 

 scarcely at all ochroleucous, as Delise describes it ; the long, linear, very narrow, forked lobes contrast strikingly 

 with the main broad divisions of the thallus ; these are somewhat channelled, and show a very slight inclination to 

 become costate. This species has some points of resemblance to S. filieina, as Delise very truly observes, but is 

 sufficiently distinct. Mr. Colenso has collected a Sticta on Fagus, which I conceive to be a large and broad state 

 of this species; the appearance of the upper side is precisely that of S. filieina, the margins of which are frequently 

 much cut and dissected like Cetraria fallax (a fact of which Delise was ignorant), and so is that of the apothecia 

 likewise ; the colour too has a tinge of ochroleucous or rufous, but the under side is not at all or very slightly cos- 

 tate, quite void of the ferruginous tint peculiar to S. filieina, and the cyphellee are also different. The same plant, 

 barren and more glaucous, and with the margins exceedingly finely out, and the segments elongated, is named by 

 Dr. Taylor S. cldoroleuca (ut supra); another specimen he has named S. filieina. Precisely the same form is found 

 fertile (apothecia minute, rufous) in Surinam, which he has named S.propaginea in Hook. Lond. Journ. Bot. vol. vi. 

 p. 178. This Lichen was discovered in Bourbon, and is also found, according to Dr. Montagne, in the Straits of 

 Magellan, Auckland Island, and the Island of Balaou (Archip. des Viti). 



C. FoLiosiE, Bab. — Frond not at all or hit slightly corniculated, extremities frequently rounded; margins sinu- 

 ated, often crenate, crisped and dissected. Apothecia not hairy. [This section cannot be strictly distin- 

 guished from the foregoing ; S. sinuosa, S. variabilis, and S. Freycinetii in some degree connect them.] 

 * Cyphellee more or less pnnctiform or indistinct, not definitely explanate. 

 17. Sticta Freycinetii, Delise; thallo amplo crasso cartilagineo sinuate appresso ambitu libero, lobis 

 plus minus elongatis sinuatis et dissectis (sa;pe folia quercus referentibus) versus apicem crenulato-undu- 

 latis subcorniculatis supra lsevi ochroleuco planiusculo s. sublacunoso, subtus subtomentoso fusco-cincreo in 

 ambitu ochroleuco, cyphellis magnitudine variis prominentibus albo-plumbeis demum subexcavatis, apothe- 

 ciis marginalibus et sparsis extus furfuraceis subtuberculosis elevatis primitus profunde concavis subclausis 



