274 



FLORA. OF NEW ZEALAND. 



\_Lichenea. 



Spain, the Mauritius, Bourbon, Madagascar, the equinoctial regions of America, Texas, and the Southern States o 

 North America, in Juan Fernandez, and the East Indies, and doubtless in many other places. It appears to affect 

 mountain woods at a low elevation (1500 feet in the Brazils), and, according to Delise, is partial to a maritime 

 situation. Martins, however, has found it in a very inland locality at Arara-Coara (province of Rio Negro). 



2. Sticta orygmcea, Ach, ! Mell. Lick p. 278 ; tliallo amplo membranaceo (fere papyraceo) rigidulo 

 patulo viridi-glauco j^» violaceo-purpurascente in ambitu lobato, profunde per totam superficiem et prm- 

 sertim ad centrum scrohiculato et reticulata, subtus bete flavo subnudo bullato in interstitns obscunore 

 ibique breviter tomentoso, lobis amplis rotundatis marginibus obtuse crenatis sublobatis, ramulis isidwideis 

 glaum, apotheciis undique numerosissimis appressis parvis, extus glaberrimis lavibus disco atro-purpureo 

 (sicco nigro) concavo demum turgido convexo, margine tenui distmcto crenato demum evanescente.— bticta 

 orygmeea, Mont., Voy. an Pole 8ud,p. 190.y. \h.fig, 1 opt. Eooh. fil. Fl. Antaret. p. 197 et p. 526. 



Var. b. rigido ; tballo rigido cartilagineo. 



Hab. Common throughout the Islands, on wood and sticks, Menzies and all travellers. 



There is some little doubt about the synonym of Acharius, as Dr. Montague and Dr. Hooker have observed, 11. CO.; 

 he may probably have included under it the 8 D'Urvillei, Delise. In Sir W. J. Hooker's herbarium are two speci- 

 mens of "S. orygmaa, Ach., N. Zealand," fixed on the same paper, from Menzies, who supplied Acharius with spe- 

 cimens. One of these belongs to 8. D'Urvillei {L. ochraceus, Menzies !) clearly ; the other I suppose to be a frag- 

 ment of the present species; the thallus, however, is thicker than ordinary, and the colour more inclined to be rufes- 

 cent thus approaching 8 Colensoi; in other respects it agrees. Delise's figure (pi. i. f. 3) is made from small frag- 

 ments • the corner figure appears to belong to the true plant; the execution of the other two fragments is so indif- 

 ferent that I can give no opinion on them.- Thallus a foot wide in a specimen from Colenso, about 3 or 4 inches in 

 the Antarctic specimens, nearly orbicular, running over trees and sticks, glaucous above, becoming darker and greener 

 when moist (usually without any tendency to a rutilant or rufescent hue), very much scrobiculated when in matu- 

 rity especially towards the middle, so that the whole thallus appears reticulated and pitted. Here and there the 

 surface (especially after being wetted) has a delicate purple-violet tint, by which character the species may usually 

 be recognized In some specimens from Auckland Island, as well as from New Zealand, portions of the upper surface 

 have a pallid brick-colour, and I suspect that this state is the 8 Fed, Delise, and that the habitat (North America) 

 is erroneous. Difficult as it is to lay down absolute characters, it may be said of this species that its colour is more 

 glaucous, its texture more membranaceous, its lobes less divided, its under side brighter and more bullated, than m 

 S aarata, D'Urvillei, or Colensoi. The apothecia also are darker than in 8. Colensoi, and far more numerous and 

 smaller than in any of the three species. The certain habitats for this species are New Zealand, Auckland Islands, 

 and the Straits of Magellan. 



3. Sticta Colensoi, Bab. ; thallo amplo patulo crasso rigido lobato luteo-glauccscente versus margines 

 plus minus sordide rufescente profunde et grosse scrobiculato ad margines iterum clathrato et reticulata, 

 lobis suboblongis profunde sinuatis et dissectis marginibus undulatis, ramulis isidioideis sordide luteis, 

 subtus nudiusculo flavido passim tomentoso et obscuriore vix bullato, cyphellis prominnlis flavis, apotheciis 

 sparsis magnis liberis extus plus minus rugosis, margine indislincto rugoso subcrenato cvanido disco vinoso 

 rubro valde concavo demum explanato lacerato. 



Var. b. pinnatifida ; thallo magis glauco minus mfo ad margined tantum et mums profunde scrobicu- 

 lato, granulis isidioideis subnullis, apotheciis extus sublsevibus. (Tab. CXXIIT.) 

 Hab. Northern and Middle Islands, Colenso, J. D. II, Rami, Lyall. 



A perplexing and variable species, but I do not see to what other it can be safely united-, its nearest ally is 

 perhaps 8. orygmma (Raoul's specimen is named S. orygmcea), but in 8. Colensoi the thallus is usually thicker, less 

 minutely scrobiculated, more divided, and differently coloured; the beautiful violet tint is wanting, though in decay 



