258 A. W. Evans — A Provisional List of the Hepaticce 



which is sharply incised-dentate, the apical tooth being larger than 

 the others and projecting beyond them. 



Stems 2-5-4'^™ long ; leaves 1™™ wide, 1-5-2""" long ; leaf-cells aver- 

 aging 0'033""" in diameter. 



Several other possibly distinct Plagiochilce occur in too small 

 quantity for determination. 



Mylia Taylori S. F. Gray {Jungermamia Taylori Hook. Syn Hep. p. 82). Ha- 

 waii (Herb. Lehm.). 



Jungermannia plligera Nees, Syn. Hep. p. 8I. Oahu(Meyen); West Maui 

 (BaldwiD, 79 !). 



J. rigida Aust. Proc. Acad. Nat. Sci. Phil., Dec. 1869. Hawaiian Islands (Hille- 

 brand); West Maui (Baldwin, 64! 154!). 



J. robusta Aust. 1. c. Hawaiian Islands (Hillebrand); West Maui (Baldwin, 



268!). 



J, COriacea Aust. l. c. Hawaiian Islands (Hillebrand, Baldwin!). 



J. macrophylla Ingstr. Ofver. af. Kongl. Vet.-Akad. Forhandl. 1872, No. 4, 

 p. 22. Hawaiian Islands (Andersson). 



J. SUbulata n. sp. Hawaiian Islands (Baldwin!). 



Coespitose, brownish-green ; stems mostly simple, creeping, ascend- 

 ing at the apex, radiculose ; leaves spreading, imbricated, ovate, 

 entire, rounded at the apex ; araphigastria wanting ; outer involucral 

 leaves like the stem-leaves, the inner very small, awl-shaj^ed, slightly 

 denticulate ; perianth (young), oblong-obovate, contracted at the 

 denticulate mouth, surpassing the inner involucral leaves, scarcely, 

 if at all, i)licate. 



Leaves 2-2-5"'"' long, 1-1-5"^'° wide; cells oval, about 0-029"^-"^ in 

 width, those of the inner involucral leaves rapidly increasing in size 

 at the apex and resembling in character the terminal cells of the 

 perianth, 



J. lurida Dum. {J. nana Nees, Syn. Hep. p 91). Hawaiian Islands (Hillebrand). 



J, Esenbeckii Mont. Syn. Hep. p. 98. Hawaiian Islands (Gaudichaud, An- 

 dersson). 



J. lucens n. sp. East Maui (Baldwin, 65, in part!). 



Loosely tufted, whitish-green ; stems simple or innovating from 

 beneath the involucre, rootless ; leaves remote, except at the summit 

 of the stem where they are imbricated, loosely areolate, pellucid, 

 sub-transverse, entire, complicate, bilobed about one-third their 

 length, the lobes acute and nearly equal Avith an acute sinus ; invohi- 

 cral leaves about three, deeply two-lobed, the margins irregularly 



