HOOKERIACEAE. 289 
Var. robustum (H. f. & W.) Dixon comb. nov. 
Syn. Hookeria fais H. £. & W., FI N.Z. hi, 124 (1855) ;sx 
Handb. N.Z. FL, p. 495. Abad. yg goph yllum robustum Jaeg. 
N.Z. 
Adumbr., ii, 247. BE en acroneura Col. in Trans 
Inst., xviii, - bie go pan toe telmophila Col. op: rg 
xix, 271 (188 
e var. robustum is a ‘stout plant, larger in every way, any 
usually of a dull green, not blackish; but no clear line ean be drawr 
between it and the type. The late Mr. Gray has sent me a fine aa 
trom Mauriceville, Wairarapa, showing all eradations in size and also 
in colour, from the type to good var. robustum 
len in describing his Hookeria sini refers to certain 
‘foreign bodies’’ on the leaves. I have not seen specimens of the 
original, but a species of Pterygophyllum gathered in a hothouse at 
Harrogate, Yorkshire (origin unknown, but certainly belonging to 
shortly cylindrical, chlorophyllose, more or less fusiform threads 
standing out on the ae usually round the iNet: and frequently so 
abundant as to form a perfect cheval-de-frise. They form without 
doubt a form of venctative reproductive organ, w vhich does not spear 
to have been elsewhere noted. 
7s ies seh ytt quadrifarium (Hook.) Brid. Bryol. univ. ii, 347 
(1827). 
Syn. Hookeri ta quadr peter Hook. Muse. Exot., t. 109 (1820) ; 
Fl. N.Z., ii, 124; ae N.Z.. 'FI.,” p: 495. Mn asi end 
quadrifarus C.M. a i, 21. Hookeria luteovirens Col. i 
. Inst. xvi, ‘360 (1884) (fide Brotherus and Mit. 
i an : sera Col. o op. cit., p. 45 (fide Brotherus). H. 
atrovirens Col., op. cit., xxi, 46 (1888) (fide Brotherus). 
This magnificent species, with stems up to six inches long and 
frequently as much as a centimetre in width, is I think certainly dis- 
tinct from the preceding group of plants. Apart from the characters 
given in tt Key, the sporophyte is much more robust (which is not 
by any means the case with var. robustum as compared with typical 
P. daxintent), The leaf also is only crenulate-denticulate above, not 
coarsely toothed, and the cells are very pone 5 stfea a 
cells in mid-leaf may ‘be up to or over 1 TOSS). ginal 
row in the region of the leaf apex us Pras ts nsists Ee mea ch 
smaller and narrower cells than the interior sa of quite different 
form, being sub-rhomboid, with the apex projecting, so that the leaf 
is here erose-denticulate. 
The leaves are not properly speaking oe ee there appear 
to me to be normally 4 rows of dorsal and 4 rows of ventral leaves, 
much smaller and rounder than the tater, of which there seem 
to be usually 2 rows on each side. They overlap one another very 
rasa a character which pp ke the plant at once from P. denta- 
7 eine to the Handbook is abundant throughout the two 
Islands; but if so it would surely be much more frequently gathered 
