502 Mr. RB. Spruce on the Musci and Hepatice of the Pyrenees. 
Plante pusille, tenerrime, 1—? unc. longe, cespitose, matrice 
arcte adfixe, instar Jg. bicrenate suaveolentes. Caulis simplex, ra- 
rius furcatus, e perianthii basi innovationes 1 vel 2 ante capsule ma- 
turationem involucro inclusas semper proferens, prostrata, apice fertili 
tamen assurgens, longis radiculis pallidis radicans. Folia pallide 
viridia, inferiora semiverticaliter affixa, subopposita, angulis dorsali- 
bus subcontiguis nonnunquam connatis, reflexo-patula, ovata vel 
ovali-oblonga, apice rotundata, integerrima; superiora verticalia, 
_plerumque conferta, basi dorsali per paria conjuncta, apice margine- 
que ventrali solis reflexa, raro apice retusa, obtuse emarginata vel 
angulato-repanda ; iavolucralia caulinis superioribus simillima, paulo 
majora, apice eroso-denticulata, cum perianthio ad basin concreta. 
Amphigastrium involucrale, ovato-lanceolatum, obtusum, nonnun- 
quam adest; czeterum caulis omnino examphigastriata est. Perian- 
thium terminale involucrum subzequans (in plantis minoribus densi- 
foliis nonnunquam involucrum vix zquat, in elatioribus autem spar- 
Sifoliis involucrum plus minus superat), e foliis duobus plus minus 
alte connatis conflatum et ex eo compressum bilabiatumque, labiis 
subconniventibus, post capsule emissionem haud raro collapsis, ore 
tametsi apertum, eroso-denticulatum rarius subincisum. Tevtura 
foliorum et perianthii est laxa, subpellucens, e cellulis majoribus in 
reti typice sexangularibus, limitibus angustis, intercalaribus nullis, 
granis chlorophyllicis magnis haud numerosis. Calyptra obovata, 
pallida, membranacea. Capsula fusca, subglobosa, tenera, laxe areo- 
lata, ad basin usque 4-valva aut, valvula una alterave bifida, 5—6-valva, 
pedicello pallido exserta. Semina grandiuscula, globosa, granulosa. 
Elateres torti, bispiri, apicibus subobtusi. 
Florescentia dioica videtur. Plante mascule foemineis tenuiores, 
tota fere longitudine staminifere. Folia perigonialia minora, semper 
per paria connata, basi ventricosa, apice patula, stamina singula bi- 
nave brevi-pedicellata circumscissim rumpentia in axillis foventia. 
Tas. IIl. Fig. 1, plante nat. magn. ; fig. 2, surculus sterilis a dorso 
visus ; fig. 3, planta fertilis a latere visa; fig. 4, apex plante masc. ; 
fig. 5, folia inferiora; fig. 6, folia superiora; fig. 7, apex folit; 
fig. 8, perianthium cum involucro a dorso visum; fig. 9, perianthium 
(effetum et collapsum) a latere, cum folio involucrali arcte retroflexo: 
omnia aucta. 
Obs. A first glance at this pretty species reminds one of Alicularia 
scalaris, but important differences are disclosed on a nearer exami- 
nation; still, an extensive comparison of apparently cogriate forms 
has convinced me that the Alicularie are in truth its closest allies. 
If a perianth of Southbya and one of Alicularia scalaris be vertically 
divided, and laid side by side, the relationship will be clearly ob- 
vious: the involucre is alike in both, and in both is it concrete be- 
low with the perianth, which also is formed on the same type in 
each. Could we now suppose the perianth of 4. scalaris to be a 
little elongated, or that of Southbya to be a little abbreviated, the 
sole important difference would vanish. In reality, small forms of 
Southbya have the perianth sometimes barely visible beyond the in- 
volucre. 
x a 
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