80 Transactions. — Botany. 



tincta. Ad ramos prope Wellington, New Zealand (/. Bu- 

 clianan) . 



Earely are there fewer spores in each theca than 8. At 

 times 2 to 4 are seen when the dimensions are somewhat 

 larger. 



Parmelia retipora, Strn. 



Thallus albidus vel palUde lutescens, arete adpressus 

 (K flavens), reticulato-terebratus (fere ut in Cladonia rcti- 

 jjora), latit. divisionum, 0-4 mm. ; latit. foraminum eirc. 

 1-6 mm. ; subtus nudus et fusco-niger (?) ; medulla alba K fi. ; 

 sporas 1, raro 2, incolores, ellipsoideae, simplices parietibus 

 crassis, 0-05 -0-065 x 0-025 -0-03 mm., paraphyses fere dif- 

 fluentes. Corticola in Tasmania a Mrs. Hcyivood McEiven 

 lecta. 



Parmelia subbrunnea, Strn. 



Thallus brunneo-nigricaus (C flavens), adpressus, bullato- 

 inaequalis, buUis saspissime perforatis, subtus niger, rugu- 

 losus, nudus margine albidus. Apothecia fusca margine 

 integro pallidiore cincta ; sporse non evolutse. Saxicola in 

 Montibus Grampianis Australiae {Sullivan). 



The hyphae are at first colourless ; those next the hypo- 

 thallus are much more numerous and fuscous, and slightly 

 branching, diameter from 0004mm. to 0-006 mm. Gonidia 

 0-008-0010 mm. in diameter. I cannot detect anything 

 morbid in the plant, while the reaction by C on the thallus 

 is constant and peculiar. 



Parmelia nigrescens, Strn. Scot. Nat., 1878. 



Sat similis P. pcrtusce sed apotheciis nigris vel caesio- 

 nigris et sporis l-2nis incoloribus dein fuscescentibus, 

 ellipsoideis, simplicibus, episporio incrassato, 0-04-0'054x 

 0-024-0-038 mm. Icdo g.h. cgerulescens dein vinose ful- 

 vescens. Supra lignum prope Wellington, New Zealand 

 (J". Buchanan). 



The epithecium shows as a rufo-fuscous almost continuous 

 layer composed of compacted cells. This may be a state of 

 P. pcrtusa, and, if so, is very peculiar. Even the young 

 apothecia are black. The thallus is pertused, and the white 

 medulla is rendered yellow by K. The thecse and spores seem 

 to be ultimately tinged rufo-fuscous together, &c. 



Parmelia angustata, Pers., seems a common lichen 

 throughout Australia, and extends even pretty far south in 

 New Zealand. Like all common plants, it assumes various 

 appearances, but the size and shape of the spores are constant — 

 —viz., 0-005-0007 x 0004-0.005 mm.— as well as the dark- 

 brown, often nearly black, spongiose hypothallus, so charac- 

 teristic of this section of the Farmclice. 



