J 323] Pearson: Notes on a Collection of New Zealand Hepaticae 315 



Plagiochila deltoidea Lindenberg, emend. Pearson 



Plate 90 



Dioicous. Medium size ; olive green in color ; caespitose. Stems 

 simple or sparingly branched. Leaves homomallous; approximate or 

 imbricate, alternate, antical (lower) margin patent-divergent (70°) 

 to patent (50°), very slightty decurrent, margin much recurved, 

 entire; postical (upper) margin extending beyond the stem, ampliate, 

 with about 12 large distant teeth ; outline of leaf semi-broadly 

 trigonous; apex rotundate with 3 to 4 teeth; cells minute, smaller 

 still near margin, roundish-quadrate, trigones distinct, basal cells 

 narrow, elongate, wall ligneous. 



Haditat. — Mamaku, North Island, New Zealand, coll. W. A. 

 Setchell, April 22, 1904, no. 4. 



Dimensions. — Stems 1 to 1% inch long ; leaves 3 mm, X 3.5 mm. ; 

 cells near margin .015 mm., at base .05 mm. X .02 mm. 



Plagiochila neohoweana Pearson sp. nov. 



Plate 91 



Dioicous. Medium to largish in size ; pale yellow to reddish brown 

 in color ; caespitose. Stems simple or sparingly branched, branches 

 erect. Leaves alternate, imbricate, patent (50°) to erecto-patent 

 (30°), antical (lower) margin slightly recurved, decurrent, entire 

 or rarely with few" distant teeth, postical (upper), slightly ampliate, 

 covering the stem but rarely extending beyond, sometimes reflexed, 

 coarsely dentate, teeth 10 to 12 straight or hamate, 6 to 8 cells long, 

 with a broad base, 4 cells wide ; outline semi-oblong, trigonous, apex 

 truncate with 2 or 3 teeth ; cells between smallish and medium in size, 

 roundish-quadrate, large trigones, basal cells the same. Bracts some- 

 what similar to the leaves, only larger and longer, with lower margin 

 5 to 6 dentate. Perianth oval, truncate, mouth wide, 40 teeth, irregu- 

 lar in length, 4 to 10 cells long, 4 cells wide at base, straight or 

 hamate ; pedicel short ; capsule reddish-brown. Androecia on short 

 and small erect branches arising from apex of stem, intercalular ; 

 perigonial bracts much smaller than the leaves, erect, closely im- 

 bricate, ventricose at base, bilobed, lobes oval, entire or with few short 

 teeth at apex. 



Dimensions. — Stems li/4 to 2 mm. long; leaves 3 mm. X 1.5 mm., 

 2.5 mm. X 1-5 mm. ; cells near margin and base .03 mm. ; bracts 

 3.5 mm. X 1-75 mm. ; perianth 3 mm. X 2 mm. ; perigonial bracts 

 1.25 mm. X .75 mm. ; antheridia .4 mm. X .3 mm. 



Observations. — I have read somewhere, but I cannot remember 

 where, that when a complimentary name is given to a plant, there 

 should be no doubt as to its specific value ; consequently I have given 

 more time to the study of this plant than to any other in the collec- 

 tion, in order to satisfy myself as to its position, being anxious that 

 it should stand good. 



