208 



FLORA OF NEW ZEALAND. 



\Thmgi 



All the species of this genus are epiphyllous, and make a near approach to Strigula. I do not know of any 

 European species, unless Strigula Babingtonii, Berk., belong more properly to Asterina ; but the genus occurs in 

 the United States, and the tropics produce one or two. (Name from aster, a constellation.) 



* Asterina torulosa, Berk. ; mycelio parcissimo, aseis elongatis, sporidiis torulosis viridi-hyalinis. 



Bab. On leaves of Piper excelsum, Colenso. 



Perithecia scattered, but grouped in little spots. Asci elongate. Sporidia filiform, torulose, 3-B-septate, ^Vo 



„_J of an inch long. — This species occurs also on Asterina dilatata, Berk., which is perhaps only an incipient 



Collema, and therefore omitted as doubtful. Like the original specimens described in the ' Antarctic Flora,' it occurs 

 on Panax. 



1. Asterina sublibera, Berk. ; mycelio parcissimo e fibris intertextis, ascis elongatis, sporidiis quaternis 

 uniseptatis liyalinis. (Tab. CVI. Fig. 1.) 



Hab. On leaves of Metrosideros diffusa, Colenso. 



Perithecia collected in little patches, with a few radiating fibres, which by no means form a membrane. Asci 

 elongated, subeylindrical, rather attenuated at the apex. Sporidia four in each ascus, oblong, slightly constricted in 

 the centre, uniseptate, hyaline, yy^ of an inch long. — Differing in its elongated asci from all known species, except 

 the foregoing, an unpublished one, A. anomala, from Ceylon, in which the mycelium is very dense, and the sporidia 

 narrower.— Plate CVI. Fig. 1. Asterina suhlibera, natural size. a. Asci, magnified, b. Sporidia, magnified 250 



* Astevina, fragilissima, Berk. ; maculis parvis orbicularibus, mycelio parco, peritheciis congestis, ascis 

 globosis, sporidiis obovato-oblongis uniseptatis. 

 Hab. On leaves of Veronica, Colenso. 



Spots scarcely a line broad. Mycelium sparing, forming rectangular anastomoses. Perithecia numerous, 

 crowded towards the centre of the spots, extremely brittle. Asci globose. Sporidia obovate-oblong, uniseptate, 

 tsV'o °f an ™ on l° Q g- 



Gen. LXXI. ERYSIPHE, Iledw. et Lev. 



Perithecia libera, globosa, astoma, floccos ajquales flexuosos simplices vel parce furcatos a basi emit- 

 tentia, indeque ex iis suffulta. Asci sacciformes. 



The genus Erysiphe, as reformed by Leveille, consists of those species only whose appendages are simple and 

 equal throughout. With other allied genera, they are the pest of cultivators. They occur only in temperate regions. 

 (Name from epvo-i(3rj, rust, a name more properly applicable to Uredo.) 



1. Erysiphe densa, Berk. ; bifrons, mycelio denso arachnoideo persistence, sporangiis mediis globosis 

 sparsis, appendiculis flexuosis candidis intertextis obovatis brevibus, sporidiis ellipticis suboctonis. (Tab. 

 CVI. Kg. 16.) 



Hab. On living leaves of Aristotelia, Wairarapa, Colenso. 



This differs from E. Martii, Lev., merely in its thick persistent mycelium, which gives it a very lichenoid 

 appearance, especially when on the upper surface of the leaves. The appendages are flexuous, sometimes forked, 

 and frequently bear one or two little knots towards the end, showing a tendency to ramify.' — Plate CVI. Fig. 16. 

 a. Sporangium of Erysiphe densa, with its appendages, magnified, b. Asci, magnified 250 diameters. 



Gen. LXXII. MELIOLA, Fries. 



Perithecia fragilia, carbonacea, astoma, e mycelio strigoso enata. Asci ampli. Sporidia magna, pauca, 

 opaca. 



