DICRANACEAE. fs 
I. DICRANACEAE. 
A REVISION OF THE NEw ZEALAND SPECIES OF DicRANOLOMA, 
DicranoLoma Renauld in Rev. Bryol., 1901, p. 85 (Prodr. fl. bryol. de 
Madagascar, &c., 1897, as subgenus). 
groups, or subgenera, as follows (“ Essai sur les Leucoloma,” p. — 
b ipruM.—Capsule & col lisse ou & peine renflé, arquée 
“Subg. Il. OncopHoroiprum.—Capsule toujours arquée col muni d’une 
apophyse saillante.” 
He proceeds to say that there are certain species which must remain 
somewhat indecisive, as the neck of the capsule possesses an indistinct 
struma. is to be the case so markedly among the New Zealand 
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development of the struma has been somewhat insufficiently appreciated 
—viz., that in species showing normally a struma it is frequently almost or 
quite obliterated in capsules which have not thoroughly matured before 
dedi ; ; 
elongate. The best evidence of this is to be found by comparing the cap 
sules ripened under such conditions with those perfectly matured. I have 
over and over again examined tufts of various species in which the just- 
ripened and, of course, most conspicuous capsules—some at least deopercu- 
late and apparently fully matured—showed a tapering base with very little 
trace of a struma, when capsules of a previous year exhibited a distinct 
struma and by their unshrunken condition and texture at once revealed 
the fact that the later ones had dried before the outer walls had attained 
the firmness of complete maturity. ae 
This has probably been the cause of confusion in the past. Thus 
D. subpungens (Hampe) is described by the author as “ D. pungenti simile, 
ag 
developed, and the capsule shorter and wider in form than in less perfectly 
tured specimens. Most, in fact, of the New Zealand species of the genus 
show some trace of struma, although it is much more strongly developed 
in some species than in others. ie 
