CoKER: NortH AMERICAN SPECIES OF ENCALYPTA 439 
ExsICccATAE: Macoun, Can. Musci gor (as E. cucullata); 
Holz. Musci Acro. Bor. Am. 214. 1906. 
Ia. ENCALYPTA EXTINCTORIA APICULATA Wahl. Fl. Lapp. 344. 1812 
Costa usually excurrent into a short hair-point; capsule when 
mature striate and somewhat ribbed. 
DISTRIBUTION: Colorado, Montana, and Assiniboia. Also 
Europe. 
Ib. ENCALYPTA EXTINCTORIA MUTICA Brid. Musc. Recent. Suppl. 
qc 20: 1619 
Costa disappearing far below the blunt apex; mature capsule 
ribbed. 
DistRIBUTION: Colorado to British Columbia. Also Europe. 
2. ENCALYPTA RHABDOCARPA Schwaegr. Suppl. 1: 56. 1811 
Leersia rhabdocarpa Lindb. Musci Scand. 26. 1879. 
Encalypia rhabdocarpa var. leiomitra Kindb. Ottawa Nat. 4: 61. 
1890. 
Encalypta subspathulata C. Mill. & Kindb.; Macoun, Cat. Can, 
Pl. 6:93. 1892. 
Encalypia leiomitra Kindb.; Macoun, Cat. Can. Pl. 6:94. 1892. 
_ Plants 1.5-2 cm. high; leaves 3-4 mm. by 0.66-1 mm. wide, 
lingulate, flat and spreading when moist; costa extending beyond 
the suddenly contracted apex of leaf into a long mucronate hair- 
point or ending below the apex, papillose on back below the middle 
and on the upper surface above the middle of the leaf; margin 
plane; papillose cells, hexagonal, diameter 15-20y; cells of hyaline 
base, irregular, not papillose, 24-48 long by 24u wide; walls 
orange, not thickened, with a distinct marginal border of 6-8 
rows of cells, 604 long by 6-10u wide; perichaetial leaves smaller 
and tapering to a hair-point. Monoicous; seta 6-8 mm., orange, 
not twisted; calyptra entire or ragged at base, papillose at apex 
and sometimes to about the middle; lid about 2 mm.; capsule 
2-3 mm. long by 1 mm. wide, cylindric, striate, each ridge of 
about 5-6 rows of cells; annulus simple; rim of the mouth marked 
by 2-3 rows of small brown quadrate cells; stomata numerous, 
Scattered throughout the entire surface of the urn; neck short, 
red, deeply wrinkled with large loose cells; peristome usually pres- 
ent, single, of 16 red, finely striate, papillose teeth, with 4-5 seg- 
ments, and occasionally with a narrow lateral preperistome cov- 
 €ring 1-2 segments at base of the teeth; spores 40-50p in diameter, 
very rough with large granular warts, ripe in late spring. 
