DR. LINDSAY ON NEW-ZEALAND LICHENS. 523 
seated at the angles of the laciniæ ; disk often cup-shaped, brownish yellow, contrasting 
with the pure pale lemon-yellow of the smooth, glistening thallus. Thalline laciniæ 
generally sublinear, very thin, subdiaphanous, frequently canaliculate, with involute 
margins, which give them a subfistulose, subterete character, often fossulate, reticulated, 
or striated to various degrees, frequently angulose or genieulate towards their extremities, 
this subacute angularity depending apparently on the development of the apothecia. 
Most forms of the Otago plant are referable to the type, and agree with var. geniculata, 
Bab. L. N. Z., which is a mere condition, undeserving separate nomenclature. Some 
forms become sufficiently broad, especially towards the ends of the laciniæ, to approach 
var. fastigiata, Fr. All the broader commoner British forms, such as frarinea, appear to 
be rare in New Zealand. The laciniæ of the Otago plant are apt to be infested with a 
parasitic microscopic Microthelia, M. ramalinaria, Linds. (Spermog. 130; Obs. Otago, 
Lich. & Fungi, p. 440, plate xxx. figs. 44—6), which is sometimes so abundant and so 
eonspieuous as to render them black-punctate. 
a. var. Eckloni, Spr. (Figs. 17, 18.) [Var. membranacea, Laur., Bab. L. N. Z.] On the 
trachytie rocks which form the banks of the Pukaki Lake, north shore, Auckland: 
W. L. L.: in fruit. An ill-defined form, undeserving of separate name or place in clas- 
sification. There are passage-forms between it and the type on the one hand, and the 
larger forms on the other. Specimens labelled « New-Zealand Moss," from the [East] 
India Museum, sent me as a dye-lichen by my friend M. C. Cooke, in October 1860, 
differ from the Otago plant only in being stouter and approaching more to fastigiata. 
The same plant apparently (sub nom. R. fustigiata, Fr.) occurs in the Museum of Eco- 
nomic Botany, Kew, and was displayed in the Great Exhibition of 1851, as “ False 
Orchella Weed” from New Zealand. This may be the lichen shown in the New-Zea- 
land Exhibition of 1865 (at Dunedin) as “Orchilla Weed,” from the north shore, Auck- 
land, and which is probably a Ramalina, inasmuch as, on the one hand, there is as yet no 
proof of the occurrence of any species of Roccella in New Zealand, while, on the other, 
various forms of saxicolous Ramaline, occurring on or near sea-coasts, rai ar 
the aspe i imi t, the tinctorial properties, of tha BUS, 
pect and habit, and, to a limited exten ry corticolous) 
R. scopulorum is more likely to be mistaken for a Roccella than Lo rs n 
forms of R. calicaris; but though I have specimens in my herbarium of R. scopu ipn 
fom the Chatham Islands, I have seen none in any herbarium — = red wins 
islands of New Zealand. I have had the same lichen, R. Eckloni, from pei on 
liverpool. collected perhaps on the coasts of some of the Portuguese PAS sep 
"ral Africa, eastern or western—intermixed with true Š Orchells M D In 
br the British orchil-manufacture), sent me by the Her. W. 2. mccum 
** specimens (fig. 17), which are fructiferous, the spores (2) are blue with iodine. 
l-septate, colourless, straight or eurved, generally the latter. Theo be Sint di haló à 
cimens of Eckloni in herbarium Kew, on Mangifera India, hing fraxinea, at 
"ty variable thallus, which is sometimes dwarf and Uu d be icattered 
Other times longish and narrow, approaching calicaris. — quee long, “0002” 
. Wer the thalline segments. Spores (fig. 18) oval-oblong, 1-septate, S 
Thecæ -0016” long, 0006" broad. 
