306 



FLORA OF NEW ZEALAND. 



[Lichenes. 



region indeed the genus seems to be principally confined, so far as present observations have been made. One or 

 two species, however, occur in India, and it is probable that others may be found throughout the tropical and 

 subtropical regions of the globe. 



Gen. XXIV. ENDOCARPON, Ach, 



1. Endocarpon pusillum, Hedw., Fries, Lick. Eur. p. 411. E. Hedwigii, A, Sc&ar.! Lick Helv. 

 Exs. n. 115. 



Hab. Northern Island, Colenso. On the ground, with Parmeliafulgens and Biatora decipiens. 



2. Endocarpon fluviatile, DC. Fries, Lich. Eur. p. 409. 

 Hab. Northern Island, Colenso. 



Very indifferent specimens, but no doubt belonging to this species. 



In this genus we again find our common British Lichens, re-appearing at the antipodes ; the species of Endo- 

 carpon are principally found in the temperate and polar regions, but also (P. mquinoctiale, Hochst.!) in the neigh- 

 bourhood of the equator at high altitudes. 



Gen. XXV. PERTUSARIA, DC. 



1. Pertusaria communis, DC. Fries, Lich. Eur. p. 420. 



Hab. Northern Island, both on bark and stones, Colenso, Haoul, etc. 



Occurring under various forms, among which is P. leioplaca, Ach., and several states which would have been 

 called Variolaria by Acharius. 



It is probable that several species of this genus occur in New Zealand ; minute fragments of a form unknown 

 to Dr. Montague as well as to myself, have been collected on stone by Colenso. The warts are extremely thick, 

 smooth, and confluent, and the plant can hardly perhaps be a state of any described species ; but it would be im- 

 prudent, in so difficult a genus, to construct a new species out of such imperfect materials. P. communis is ubiqui- 

 tous within the temperate regions. 



Gen. XXVI. PORINA, Ach. 



1. Porina cucurbitula, "Mont., Fl. GUI. ined. c. ic." Mont.! in lilt 

 Diagn. Phycol. n. IB. in Ann 



Pertusaria cucurbitula, ej- 

 misprint for Porina ?) 



8c. Nat. v. 18. ser. iii. 



Hab. Northern Island, on bark, Colenso. 



A remarkable plant, unlike any species with which I am acquainted, but which, if casually inspected, might be 

 taken for a small form of Pertusaria communis. Hypothallus filmy, white and silvery. Crust somewhat radiating, 

 orbicular, patches confluent and spreading widely over the bark on which it grows, cream-coloured, warty. Jpo- 

 thecia very numerous, smallish, sessile on the crust, prominent, subconfluent, of the same colour as the thallus, at 

 first closed, then expanding and margining the single apiculated nucleus which they enclose. Nucleus waxy within, 

 at length falling away, leaving the excipulum empty and wax-coloured at the bottom. — I am indebted to my excel- 

 lent friend Dr. Montagne for determining this plant. Porina differs from Pertusaria " par des verrues uniloculaires," 

 as he observes in his description of Porina endochrysa; consequently the present Lichen is a Porina. 



2. Porina endochrysa, Mont.! Cent. 3. n. 98 ; ejusd. Crypt. Guy. n. 229. (Tab. CXXVIII. D.) 



Hab. Northern Island, Colenso. 



Dr. Montagne confirms my supposition that this Lichen is his P. endochrysa. The under side of the plant is 

 studded with buff pilules, which are produced by the protuberant bases of the apothecia. Sjjoridia ^ of an 

 inch long, muralia, as Elotow would call them, i.e. containing irregular dissepiments, pressing irregularly against 



