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172 FLORA ANTARCT ICA.
5. S phæ r ia (foliicolæ) depressa, Berk; gregaila^ minor^ atra, peritlieciis tectis subglobosis lævibus
coUo destitutis siccitate depressis, sporidñs lanceolatis. (T.yb. LXYIII. Fig. Y.)
H a b . Campbell’s Island; on tlie dead leaves of Luzula crinita.
Gregaria, epidermide atro-pmictato omuiuo tecta. Feritkecia minora, subglobosa, collo destituía, siccitate
depressa. Asci lineares, parapliysibus tenuioribus immixti. Sporidia biseriata, lanceolata, endochromio bipartito
sed non septato.
Tlie only species iritli wbicli the present can be compared are S. duplex and S. Scirpicola; from both these
it ivill be found to differ by the external characters given above, and, from the latter in particular, by the simple
peRucid and neither tiiseptate nor yeRowish sporidia.
P late LXVIII. Fig. V.—1, leaf and fungus of the natural size; 2, portion of the same, magnijied; 3, asci
and paraphyses ; 4, sporidia, she-ïiong the endochrome coRected at either extremity ; magnified.
6. DOTHIDEA* Fries.
1. D o th id e a hemispherica, Berk ; hypogena, soRtaria, erumpens, macula subeflusa epipliyRa nigra, stremate
hemispherico carbonaceo, ceRuRs elRpticis obtusiuscuRs, ascis breviuscuRs, sporidiis uniseptatis oblongis.
(T a b . LXVII. Fig. II.)
H a b . Lord Auckland’s group ; on the leaves of ;
* I take the present opportunity of describing two new species of Lothidea, contained in the Herbarium of Sii-
W .J . Hooker.
1. D o th id e a circumscripta, Berk. ; innata, gregaria, maculis suborhiculaiibus in-egulailbus depressis nigris
nitidis circumscriptis, cellulis paucis magnis depresso-globosis, coRo brevi, ostiolo papiRæformi, ascis clavatis, sporidiis
oblongo-lanceolatis. (Tab . LXVIII. Fig. VI.)
Ha b . Andes of Columbia {Jameson). Chacapoyas, Peru {Mathews) ; on various species of Vacclnium
Hypophylla, rarissime epiphyRa, innata. Maculæ\ lin. latæ, suborbiculares v. confluentes, irregulai*es, depressæ,
nigræ, nitidæ, quandoque leviter undulatæ, minutissime granulatæ, ostiolis paucis, papiRæformibus notatæ, linea nigra
plus minusve evidenter circumscriptæ, demum omnino fatiscentes, et scuteRam epideimide margmatam exhibentes.
Celluloe fructiferæ paucissimæ, magnæ, globosæ, depressæ, coRo brevi, ostiolo papülæformi. Asci clavati. Sporidia
octona, oblonga, hinc acuminata,
A very pretty species, remarkable for the smaR number of fructifying ceRs and the dark line enclosing the stroma,
which is especiaRy evident when the latter is abortive; beyond this line there is sometimes a coloured ring. The
sporidia ai-e almost of the same shape with those figured by Corda, in Rhytisrna Fhtgeniaceanm ; when young they
are fiRed with distinct gi*anules which become less evident as they are more developed. In age the stroma completely
decays and faRs out, lea\dng a scuteRum surrounded by the cuticle. This foRows from the dark line indicating
a harder substance than that of the stroma, which is not always externaRy visible, but wiU be found on making
a vertical section.
P late LXVIII. Fig. VI.—1, a branch of Vaccinium and fungus of the natural size ; 2, a section,
nified; 3, asci, slightly magnified; 4, sporidia, highly
2. D o th id e a hullata. Berk.; epiphylla, buRata, suborbicularis, nigra, superficialis, crassiuscula,
lata, inti^ nigi-a, celluRs ellipticis, ostiolo papiRaeformi, ascis oblongis, sporicUis oblongis uniseptatis.
H a b . P e ru ; on the leaves of a resinous shrub. {Mathews.)
EpiphyRa, submarginaRs, superficiaUs. Maculce F imc. latae, suborbiculares, crassiusculae,
granui
bullatæ.
Hypogena, nigra, maculam nigram snbeffusam superne stromatis indicem exMbens, una tantum macula in singulo
folio ut videtur- evoluta. Stroma J - 1 lin. latum, hemisphericum, carbonaceum, extus scabriusculum, nec evidenter
papiUato-grannlosnm, demum fatiscens : intus carbonaceum, superne reticulatim ceUnlosum, sub lente atro-cæruleum
vel demum viridi-fuscum constans, basi in fioccos abeunte. Céllulæ fructiferco oblongo-eUipticæ, periphericæ, obtnsi-
usculæ, vix apiculatæ. Asá broviuscuK. Sporidia octona, oblonga, uniseptata, medio constricta.
This species has much more the habit of a Splueria than most Fothideoe, being of a carbonaceous texture,
like the Splueria fraijiformia ; but though, on making a debcate vertical section, a thin stratum of tissue, consisting
of oidy a single layer of cells, occasionaUy appears, no trace of tliis is seen on the sides of the cavities distinct from
the neighbouring tissue. The specimens procured are not munerous, in no instance does more than one individual
appear upon a single leaf, the latter being probably of too small a size to support more than a solitary stroma of such
high organization. Like some other species indicated by Montagne in his ' Fungi of Cuia,' this is probably originally
produced between the layers of the cuticle, for some of the latter is found beneath the stroma. The cells of the stroma
pass at the base into a mass of reticulated filaments, without any membrane being attached to the meshes.
P late LXVII. Fig. II.—1, a sprig of Veronica odora, with the fungus of the natural size ; 2, a section of the
fungus ; 3, a portion of the same, more highly magnijied ; 4, an ascus ; 5, sporidia ; 6, a section she-wing the loose
cellular tissue of the centre, the pentagonal tissue about the base of the cells, and the elongated tissue between
tkein :—aR ?
2. D oth id ea spilornea, Berk.; gregaria, RypophyRa, macuRs epipRyUis nuRis v. obsoletissimis, subinnata,
depressa, tennis, orbicularis, sæpe confluens, ruiuutissime granulosa, nitida, ceRuRs globosis, ascis clavatis,
sporidiis oblongis uniseptatis medio constrictis. (T a b . LXVII. Fig. I.)
H a b . Lord Auckland’s group and CampbeR’s Island ; on the leaves of Veronica elliptica, Forst.
Hypogena, nigra, nitida ; macuRs F—g- hn. latis, gregariis, orbiculailbus, quandoque confluentibus, depressis,
subiiinatis, tenuibus, minutissime granulatis. Stroma tenue, subtus cum parenchymate confusum. Celluloe fructiferæ
globosæ, ostiolo punctiformi. Asci clavati. Sporidia oblonga, quandoque cui-vata, uniseptata, medio constricta.
Ill some leaves tbe spots are very numerous, in others they are but few and of a larger size. The species is
most allied to the D. ampkimelana, Mont., and B. Zollingeri, B. and M., although not very near either ; it exhibits,
also, some affinity with B. granulosa, Hook, et Arn. Externally it strongly resembles the punctiform variety of
Rhytisrna salkinum. The spots are of a shining black, and are very minutely granulated under a lens.
P late LXVII. Fig. I.—1, a sprig of Veronica elliptica, covered ivith the parasite, of the natural size; 2, a
section, slightly magnified; 3, ditto, more highly magnified; 4, asci; 5, sporidia : magnified.
!:•
7. ASTEROMA,
1. A steboma dilatatum, Berk.; superficiale, macuRs riccia?formibus, lobis dilatatis e filamentis serpen-
tibus approximatis m membrauam congestis. (Ta b . L X V III. Fig. V II.)
uigraj, non taraen nitid®, rugosiusculfe, granulatae, intus nigi-s, substantia sub lente fusca. Cellula friictiferce elliptica?,
albo-farctai, ostiolo papRlfeformi. Asci oblongi, basin versus latiores. Sporidia oblonga, uniseptata.
A very fine species, allied to B. amphimelana, Mont., B. Ruta and B. pucdnioides. The first of these is more
regular' and innate, besides haidng a spot ou the under side opposite to that on the upper ; whereas, in the present
species, iu consequence of the superficial mode of gi'owth, there is no such spot. B. amphimelana has no erident
border to the stroma. B. Ruta has imiseptate sporidia, but they ai*e short aud brown ; in which respect also B.
hullata diil'crs from B. pucdnioides, aud in several other characters fi'om both, as its much larger size.
2 M