440 
23. Bryum (Bhodobryum) limbato-marginatum n. sp.; cespites humiles 
lati valde intricati lutescentes tomentosi; caulis pusillus tenellus 
nudiusculus apice minute rosulatus; folia siccitate valde contorto- 
complicata minuta madore laxe patula, e basi longiuscula angusta 
spathulado-ovata in acumen breve plus minus refiexum acutum 
excurrentia, concava, ubique latiuscule limbato-marginata ad acumen 
solum breviter denticulata, nervo pro folio crassiusculo viridi in 
aristulam percurrente exarata, e cellulis parvis longis laxiusculis 
utriculo primordiali valde repletis reticulata. Reliqua ignota. 
Habitatio. Insulae Ilawaiicae, sine loco speciali: Dr. W. 
Hillebrand. 
Foliis parvis teneris rosulam minutam sistentibus lato-margi- 
natis vix denticulatis facile cognoscendum. 
24. Bryum (Erythrocarpidium) megalostegium Sulliv. in Exped. AVilkes 
p. 9 t. 7. 
Habitatio . Insulae Ilawaiicae, Mauna Loa, in declivibus syl- 
vestribus. Ilb. Sullivant; West Maui, Kanapali, Aug. 1870 et 
auf Lavatuffe (1872) in loco non designato: Dr. Hillebrand; 
insula Oahu, inter Campylop . pertristem: F. L. Clarke. 
25. Bryum (Senodictyum, Cruda) plumaefolium n. sp.; cespites polli- 
cares laete virides laxi basi solum tomentosuli; caulis simplex 
angustifrondeus flexuosus eleganter plumosus; folia caulina sicci¬ 
tate atque madore laxe patula parva setosula longiuscula angustata 
lineari-acuminata in subulam tenuem aristatam acutam attenuata, 
carinato-concava, nervo angusto distincto flavido in subulam per¬ 
currente calloso-exarata, margine erecto apice solum obsolete 
denticulata, e cellulis angustissimis longiusculis flavo-chlorophyllosis 
tenuiter membranaceis teneris areolata; perichaetialia rninora in 
gemmulam minutam congesta brevia; tlieca in pedunculo elongato 
tenui rubro flaccido subinclinata, e collo longiusculo clavato-ovalis 
angusta microstoma, operculo conico obtuso. Caetera ignota. 
Habitatio. Insulae Ilawaiicae,' East Maui, Monte vulcanico 
Haleakala, 7500 ped. altum: D. D. Baldwin 1875. 
Species elegans, fronde eleganter plumosa, foliis lineari-acu- 
ininatis et fructibus longe pedunculatis clavatis facile distinguenda. 
Bryum cespiticium et Br. Indicum , quae Sullivant in Expe¬ 
ditione AVilkesiana p. 10 inter AIuscos Hawaiienses enumeravit, 
species novae probabiliter erunt. 
26. Thysanomitrium Hawaiicum n. sp.; cespites lati pusilli pollicares 
rigidissimi; caules steriles tenues subulati lutescentes vel aetate 
crassiores nigricantes turgiduli, fertiles basi nigricantes turgescentes 
in comulam minutam tenuiter julaceo pedunculatam excurrentes; 
folia caulina e basi parum decurrente cellulis alaribus planis non- 
nullis laxis majusculis aureis ornata angusta in laminam anguste 
cymbiformi-oblongam acuminatam strictam integerrimam sed dorso 
summitatis angustissime alatam superne convolutaceam producta, 
nervo subangusto planissimo pallido striato in acumen obtuse 
inucronatum percurrente, cellulis ellipticis in membranam duram 
