of the Hmoaiian Islands. 259 



sinuous-denticulate ; perianth ovate-cylindrical, somewhat plicate at 

 the dentate mouth. 



Stems 1-5-2-5''"' long ; leaves 0-5-0-75™'" long, 0-4-0-7""" wide ; 

 leaf-cells averaging 0'05.5""" long by 0'035'"'" wide. 



This species is allied to J. minuta Crantz ; it diifers in its larger 

 size, in the larger and looser areolation of its leaves, in its pale color, 

 and in its normally two-cleft involucral leaves. The sinus of the 

 leaves has an angle of a little less than 90° ; the sinus of the involu- 

 cral leaves is often much sharjier. 



Nardia callithrix Spruce {J. callUhrix Lindenb. et Gottsdie, Syn. Hep. p. 673). 

 Hawaiian Islands (Hillebrand). 



N. Mauii (J. Mauii Aust. Bull. ToiT. Bot. Club, vi, p. 303). West Maui (Baldwin, 

 242!). 



N. exserta n. sp. West Maui (Baldwin, 264 I). 



Dioecious, ctespitose, dark or hlackish green ; stems simple, radic- 

 ulose, rigid, erect ; leaves subtransversely inserted, imbricated, 

 obliquely spreading, orbiculate, entire ; amphigastria none ; involu- 

 cral leaves tAvo or three, similar to the stem-leaves, slightly connate 

 with the perianth at its base ; perianth large, long-exsei'ted, obovoid 

 or camjjanulate, slightly plicate, the mouth open, lacerate. 



Stems 2-3'"" long ; leaves about 1""" in diameter, the cells aver- 

 aging 0"025""" in diameter ; perianth about 3""" in length. 



Tylimanthus integrifolius n. sp. East and West Maui (Baldwin, 95! 

 183!). 



Dioecious, csespitose, brownish-green ; stems simple or somewhat 

 pinnately divided, eradiculose except near the extremity of fruit- 

 ing stems ; leaves contiguous or slightly imbricated, oblong or ovate, 

 the margins mostly entire, except near the involucre where they are 

 irregularly crenulate, the dorsal margin often more or less indented 

 near the rounded apex ; amphigastria none ; involucre ovoid, thick- 

 ened, with numerous radicles. 



Stems about 4'"^ long ; leaves 1-1 -o""" long, 1""" wide ; cells 

 0-025'"'" in diam. in middle of leaf, longer towards base ; involucre 

 2-5-3""" long, 1""" wide. 



Pallavicinia Cylindrica {Reetzia cylindrica Aust. Bull. Ton- Bot. Club, v, 

 p. 17). Hawaiian Islands (Hillebrand); West Maui (Baldwin, 70 in part!). 



P. Baldwinii [S. Baldwinii Aust. 1. c. vi, p. 303). West Maui (Baldwin, 70 in 

 part). 



Trans. Conn. Acad., Vol. VIII. 35 Dec, 1891. 



