SCAPANIA 147 
Key to the Species. 
Uppermost leaves (in © plants) with long curved teeth on the carina ; perianth- -mouth 
denticulate or subentire. 3. 5. Oak sii. 
Leaves without teeth (or very rarely a single toetb) оп the carina or fold. 
al margin of dorsal leaf-lobes with long, decurved, often pus igs а cilia ; leaves 
coarsely dentate ; ne lobes oblong-ovate. S. Bolanderi. 
Basal margin of dorsal leaf-lobes entire or with small teeth. 
Plant ( ** frond "' ) di complanate ; leaves always distichou 
Stems 4-15 mm. long; ventral leaf-lobe very slightly or not at all de- 
Leaves i 1-24 their length; ventral lobes Ж ovate, acute 
ed a somew 
or subacuminate, serrate-dentate, deflex d often 
secund ; dorsal lobes nearly parallel to the i. appressed- imbri: 
cate above; perianth-mouth entire or repand. 5. S. umbrosa. 
Leaves bilobed № their length ; ventral lobes orbicular-ovate to obo- 
vate, often obtuse, entire or sparingly dentate ; dorsal lobes erecto- 
patent or patent-horizontal, ascending, never appressed-imbricate ; 
perianth mouth in most cases shortly ciliate-dentate. 
6 
. S. curta. 
Stems 1-10 cm. long, ventral.leaf-lobe decurrent, obtuse, rarely subacute. 
Plants aquatic; leaves flaccid, lobes often subequal at apex, some- 
times entire, the ventral round-trapezoidal ; perianth-mouth repand 
or subdentate. 4. 5. untulata 
Plants поп-адиайс ; leaves somewhat stiff, ciliate-dentate ; белы 
es obovate, 2-274 times the size of the dorsal ; pen -mouth 
cilia te-dentate. 2. 5. петото 
Plant қый frond ’’ ) eae complanate ; leaves sometimes 22426 замаа 
interpolation of unlobed leaves, erecto-patent, often with squarrose tips. 
. 5. heterophylla, 
I. SCAPANIA Вог.АхрЕкі Aust. Proc. Acad. Nat. Sci. Philad. 1860: 
218. 1869. 
Scapania caudata Tayl. in herb. 
Scapania Californica Gottsche; Cal. Med. Gaz. 1870: 184 
(40) (name only). 1870. 
Scapania albescens Steph. Bot. Jahrb. 8: 96. 1886. 
Olive-green to yellowish-brown, caespitose: stems rigid, as- 
cending, nearly prostrate or subpendulous, 1-4 cm. : ong, dichot- 
stiff, hardly changed in form or position on drying, acutely com- 
plicate, narrowly alate-carinate, the carina entire or rarely fur- 
nished with a single tooth; ventral lobes obliquely oblong-ovate, 
patent, strongly convex, obtuse, slightly decurrent, coarsely den- 
tate, 214 times greater than the d dorsal, apex and ventral margin 
deflexed ; dorsal lobes broadly and ibliquely ovate, more or less 
