DICRANACEAE. 37 
Kry TO THE SPECIES. 
Seta curved, so that the es is ety exserted ~ eorrgd ¢ emer 
Seta erect or ony si la ate c 
Capsule with ADtie rd ngs 
21cah sule with a S ce sstiity: pti anid obtuse point .. 3 
ewer leaves very short and obtuse or subobtuse, densely nabeate and 
julaceous so that the stem is (especially when dry) subterete; uppe 
3 le eaves somewhat rigid 
Leaves all with more or less slender and attenuated flexnose points ; : anu 
plants not terete and catkin-like when dry . 3. gracilentum. 
gone leaves obtuse and rounded, nerveless or ge aay nerved ; nerve of 
4, | le leaves vanishing below apex .. 5. curvulum. 
Amc a lowest and middle leaves percurrent or r excurrent .. 4. nervosum. 
]. Pleuridium Arnoldii (R. Br. ter.) Par., Ind 571; Roth, Aus- 
sereuropaischen Laubm., 1, 155, tab. xvi. [Plate 7; ‘fig, 2.] 
sa Seca) ajmseas R. Br. ter.in Trans. N.Z. Inst., vol. 26, p. 308, 
The most Peete i the New Zealand species ; almost stemless, pale or 
yellowish green, in dense silky patches, scarcely 2mm. high. Leaves all 
except the basal finely setaceous, the long, flexuose subula almost entirely 
filled ee the excurrent nerve, more or less sharply denticulate in the whole 
of the art; nerve strong, in the lower leaves shortly, in the peri- 
chawtiat made very longly excurrent in a flexuose or curved denticulate 
arista. Basal cells lax, thin-walled, narrowly linear-hexagonal, above 
narrower, linear or rectangular. Seta and capsule of about equal length, 
together about 0°75 mm., the former strongly arcuate or cygneous ; capsule 
oval-globose, ae pale, with a short, acute, rostellate, often slightly 
curved beak of about 4 its own length. Spores 25-30 mu, irregular in out- 
line, finely dinky punctulate | 
Hab—Moa Creek, Wilberforce River, Canterbury, New Zealand (not 
Australia, as Roth gives it); leg. R. Brown. Swampy Hill, Dunedin ; 
. Petrie. 
sf A very delicate, silky plant, smaller than the Kuropean P. subulatum. 
and entirely different from the other species in the toothed, setaceous leaves 
and the cygneous seta. 
The perichaetial bracts are certainly not shorter than the upper leaves, 
as R. Brown describes them, but longer, very 6: 2 and finely setaceous 
with the excurrent nerve (not as figured by Roth and Brown). 
Mr. Petrie’s plant, which was undetermined, agrees exactly with the 
type of P. Arnoldii in R. Brown’s herbarium 
2. Pleuridium longirostre Dixon sp. nov. [Plate V, fig. 1.] 
Caespites densiusculi, sericei, 2-3 mm. alti, flavo-virides. cage —_— 
infim 
brevis, simplex vel sub perichaetio imnovans. Folia 
brevissima, acuta, reliqua omma elongate subulata e basi concava ian ; 
caulina cirea 15 mm. longa, comalia seu perichaetialia longiora, ad 3 mm., 
paullo latioribus, eo margines versus perangustis, instructum. 
irig? icum. Flos culus infra perichaetium situs, gemmiformis, rufo- 
¢, bracteis ovatis, ee iter acuminatis, antheridiis =. circa 0°25 mm. 
pe paraphysibus subaequilongis filiformibus inte “ 
