1904] CARDOT AND THERIOT: MOSSES OF NORTH AMERICA 365 
breviter rectangulis, inflatis, lutescentibus. Caetera ignota. 
Plate XVII, 
Illinois: Chicago (Dr. J. R6ll, 1888). Wisconsin: Madison (Cheney and 
True). W. Minnesota: Cedar Lake, near Montevideo, Chippewa county (J. 
M. Holzinger, 1go!). 
The nerve bearing on the back two high, serrate lamellae, and the 
shorter, thinner-walled cells of the areolation, seem characters of sufficient 
value to separate this moss from D. Bonjeantz. 
Fissidens Bushii (Card. & Thér.) Card. & Thér. sp. nova. 
(F. subbasilaris var. Bushii Card. & Thér. in Bor, GAZETTE 30: 
16. 1900).—Monoicus, laxe cespitosus, pallide vel lutescenti- 
viridis. Caulis brevis, 5-8™" longus, divisus. Folia oblongo- 
lanceolata, obtusa, abrupte apiculata, toto ambitu minute 
denticulata, 1.2-1.4™™ longa, 0.45™™ lata, lamina dorsali basi 
rotundata, haud undulata, costa percurrente, basi 40 crassa, rete 
Opaco e cellulis minutis, angulosis subrotundatisve, 6—7 » latis, 
parietibus incrassatis, marginalibus haud vel parum translucen- 
tibus. Flores feminei in ramulis brevibus basalibus. Caetera 
ignota. Plate XVII. 
Missouri: Eagle Rock, on gravelly ground (B. F. Bush, 1897). Texas 
(Elsa Baumann ; herb. Dr. Zickendrath). 
At first we considered this moss as a variety of F. subbasilaris Hedw., 
but further observations led us to a different conclusion, and now we think it 
preferable, on account of the inflorescence and the costa reaching the apex, 
to place it near F. ¢axifolius Hedw., of which it may be a subspecies, charac- 
terized by the nearly twice smaller size, the obtuse abruptly apiculate leaves 
with the dorsal wing not undulate at base and with smaller cells. From /. 
subbasilaris it is easily distinguished by the inflorescence and the costa reach- 
ing the apex. 
FissIDENS PUSILLUS Wils. var. brevifolius Card. & Thér., var. 
Nova.—A forma typica differt foliis innovationum sterilium multo 
brevioribus, magis abrupte et brevius acuminatis. 
California: Soldier's Home, Los Angeles county (Dr. Hasse, 1902; herb. 
C. F. Baker 
Pottia nevadensis Card & Thér., sp. nova.—Monoica? viridis, 
densiuscule cespitosa. Caulis erectus, brevis, 1—2™™ altus. Folia 
erecta, ovata, concava, media 1™™ longa, 0.6™™ lata, inferiora 
minora, omnia laevia, marginibus integris, saltem uno latere parce 
