112 JUNGERMANNIACEAE 
branched, prostrate-entangled or slightly ascending, rather rigid, 
beset with long root-hairs almost to the apex : leaves transversely 
inserted, of nearly uniform size throughout, .5-.0 mm. long, not 
decurrent, bilobed to below the middle (3-2) with an acute sinus, 
complicate, the fold nearly a right angle but rounded ; lobes of 
about equal length, acuminate, obscurely crenulate towards the 
apex, the dorsal narrower, lanceolate, suberect or ascending, some- 
what parallel to the stem, the ventral ovate or oblong-ovate, 
patent-horizontal (752-802), submarginate toward the Базе; leaf- 
cells opaque, firm-walled, with small trigones, hexagonal-quadrate, 
17-24 и, more elongated at base, cuticle minutely roughened: 
underleaves none: antheridia 1 or 2, subglobose, without paraphy- 
ses, on short pedicels in the axils of closer somewhat ventricose 
leaves with appressed imbricate dorsal lobes: 9 bracts larger than 
the leaves, long-acuminate, sparingly dentate; perianth oval or ob- 
long, 2-3 times length of the involucral leaves, deeply plicate, the 
mouth ciliate-lacinulate. 
Exsicc. Hep. Am. 193 (as Diplophylleia Dicksoni). 
On the face of a shaded cliff near Cazadero, Sonoma Co., on the 
road to Fort Ross (Маг. 14, 1896). Collected also by Dr. Bolan- 
der at Mendocino City. These are the only American stations | 
thus far known for this hepatic. Our specimens are sterile or bear 
antheridia alone, so that the species is presumably dioicous. The 
description of involucre and perianth is drawn from Husnot's Hep. 
Gall. по. 29. Тһе leaves are rarely three-lobed in the Californian 
plants as also in the European. : 
The identification of Dickson's Jungermannia ovata “е specimine 
auctoris” was first made by Lindberg (Musc. Scand. 7. 187 9} 
Mr. А. Gepp of the British Museum has kindly at our request ee 
amined the specimen of /. ovata Dicks. in the Dickson herbarium 
and confirms the determination of Lindberg. Mr. Gepp wi 
“ Our specimen of J. ovata Dicks. is labeled ovata by Dickson, and, 
so far as the arrangement of the specimens goes, it is the 
doubted type of the species.” 
_ The rounded, instead of acutely carinate, fold of the leaf suffi- 
ciently removes the species from the genus Diplophylleia and places 
it in the Sphenolobus section of Lophozia. 
22. PLAGIOCHILA Dumort. Rec. d'Obs. Jung. 14. 183% 
Martinellius S. Е. Gray р. р. Nat. Arr. Brit. Pl. I: 690. ! 82 
Каана Dumort. Р. р. Comm. Bot. 112. 1822. 
