392 
Proceedings of the Royal Irish Academy. 
24. 0. phjllanthum (Bruch et Schimp.). Bryol. Europ., vol. iii. 
Monogr., p. 30, tab. 223. Bryol. Erit., p. 190, tab. 46. 
Hab. On trees, more rarely on rocks. Abundant in every part of 
Ireland, but never yet found fruiting in this country. 
38. Ztgodoi^. Hook, et Tayl. 
Diagnosis of Species. 
Calyptra conico-cuculliform, or attenuate-rostrate. Capsule pedicel- 
late, or immersed ; striated, apophysate. Peristome either double, 
single, or absent ; outer teeth 8 or 1 6 ; united 2 or 4 together ; 
inner peristome of 8 or 1 6 cilia, alternating with the outer teeth. 
Leaves linear-lanceolate, carinate, costate to their points ; areola- 
tion, small dot-like above, larger and more attenuate below. In- 
florescence synoicous, monoicous, or dioicous. Distinguished from 
Orthotrichum, principally by the cucullate narrow calyptra. 
Stems caespitose; lower leaves oblong; upper 
lanceolate-acute ; capsule turbinate, 
striated, on a short pedicel, without 
peristome, dioicous, . . . . 1. Z. Mougeotii. 
Stems tufted, CEBspitose ; branched dichoto- 
mously; leaves dense, subsquarrose, 
widely spreading, recurved; capsule on 
a longish pedicel ; obscurely striated ; 
lid beaked ; peristome wanting, . . 2. Z. vieidissimus. 
Stems tufted, fastigiate ; short and not much 
branched; leaves spreading, broadly- 
lanceolate ; nerve scarcely reaching 
to the apex; capsule striated; lid 
beaked, . . . . . . 3. Z. conoideus. 
1. Z. Mougeotii (Er. and Sch.). Eryol. Europ., vol. iii. Monogr., 
p. 7, tab. 206. Eryol. Brit., p. 192, tab. 46. Amphoridium 
• Mougeotii. DelS'otr. Briol. Ital., p. 276. Eabenhor., Bryothec. 
Europ., JSTo. 523. 
Hab. On moist shady rocks; frequent in many parts of Ireland, 
but very rare in fruit. A solitary stem with fruit was 
found near the head of Glenbally-eman, near Cushendall, 
Antrim, in June, 1863. 
2. Z. viridi&simus (Bridel). Eryol. Univ. 1, p. 592. Eryol. 
Europ., vol. m. Monogr., p. 7, tab. 206. Eiyol. Brit., p. 193, 
tab. 6. Amphoridium viridissimum, De Notr,, Briol. Ital., p. 
277. Gymnostomum viridissimum, Smith, Engl. Bot., tab. 
1583. Muscol. Brit., Ed. 2, p. 18. 
