EvaANs : HEPATICAE OF PuERTO RIco 189 
usually with three or four scattered and equidistant teeth in outer 
portion, the teeth as in O. /unulata; cells of lobe plane or nearly 
sO, averaging 16 # at the margin, 23 # in the middle and 30 zat the 
base, thin-walled, the triangular trigones and oval intermediate 
thickenings a little smaller than in the previous species: under- 
leaves distant, 0.6 mm. long, 0.5 mm. wide, obovate, plane or 
nearly so, apex broad, the apparent basal auricles rounded, margin 
commonly entire below and varying above from entire to sharply 
denticulate, the teeth sometimes conspicuous: inflorescence autoi- 
cous: Q inflorescence borne on a leading branch or on a short 
branch, innovating on one side, the innovation often floriferous ; 
bracts obliquely spreading, slightly complicate at base, unsym- 
metrically obovate, 0.95 mm. long, 0.7 mm. wide, margin more 
sharply dentate than in the leaves, antical margin strongly curved, 
postical margin nearly straight, apex broad and rounded ; bracteole 
free, orbicular to oblong, about as large as the bracts, margin 
plane, varying from entire to sharply denticulate ; perianth obovate 
in outline, 1.35 mm. long, 1 mm. wide, broadly cuneate toward 
base, broad and shortly obcordate at apex with a short beak, anti- 
cal face plane or nearly so, postical face with a distinct keel some- 
times bearing a few short teeth in the upper portion, lateral wings 
extending almost to the base, two to five cells broad, each about 
twelve-dentate, the teeth sharp, two to five cells long and usually two 
cells wide at the base: (J inflorescence occupying a short branch ; 
bracts in three to six pairs, imbricated, the lobe ovate, rounded or 
subacute and apiculate, margin entire or nearly so; lobule as in 
O. lunulata; bracteoles contiguous, oblong to obovate, margin 
entire: mature sporophyte not seen. ' 
On living leaves. El Yunque, Zvans (182). Also known 
from the following localities: Andes of Peru and Ecuador, Spruce; 
Mexico, Lichmann; Brazil, Beyrich, Beske, Lindman; Cuba, 
Wright ; Jamaica, Maxon, Evans; Dominica and St. Vincent, 
Elliott ; Costa Rica, Pittier. The type-specimens are said to have 
been collected on the island of Mauritius, but Stephani looks 
upon this statement as an error due to the mixing of labels and 
concludes that Sieber’s specimens also came from tropical America. 
At all events the species has not recently been collected in Africa. 
Lejeunea chaerophylla Spruce is here reduced to O. Steberiana 
on the authority of Schiffner,* who is supported in his statements 
by Stephani.t Both of these writers examined Sieber’s type. 
* Nova Acta Acad. Caes.-Leop. 60: 230. 1893; also Bot. Jahrb. 23: 588. 1897. 
1 Hedwigia, 34: 238. 1895. 
