480 Best: REVISION OF THE 
at Columbia Falls, Montana, Sept. 5, 1895; found also by 
Professor Holzinger in Minnesota. It usually grows on rocks 
and rotten wood. 
The North American Heteroleskeae differ from the European 
by being usually more markedly proliferous. The somewhat 
dense tufts of var. flagellifera are mostly flagellate branchlets 
which when dry readily separate from their attachments. By 
soaking these tufts and dissecting out the stems and branches 
leaves may usually be found sufficiently developed to make pos- 
sible the identification of the plants. 
15. LESKEA CYRTOPHYLLA Kindb. in Macoun, Cat. Can. Pl. 6: 
169. 1892. 
Plants very small, in rather compact tufts, deep green to rusty 
brown; stems 1-2 cm. long, prostrate, scarcely radiculose, irregu- 
larly branched ; branches erect, simple or with flagellate branch- 
lets: paraphyllia usually none : stem-leaves somewhat spreading, 
roundish ovate, concave, broadly inserted, 0.3—0.4 mm. wide, 0.4- 
0.5 mm. long, abruptly acuminate, acumen usually sharp-pointed ; 
costa short, thin, usually forking; margins entire, sometimes re- 
curved below; branch-leaves roundish-ovate, rather gradually 
acute or short-acuminate, often blunt-pointed, 0.2-0.25 mm. wide, 
0.25—0.3 mm. long ; leaf-cells rounded or angular, not uniform, 
somewhat clear, with usually a small flat subcentral papilla on 
each surface ; median cells oval-rhombic, 9-13 # wide, 12-16 # 
long ; alar transversely compressed, in 5-7 rows: apparently dioi- 
cous : capsules not seen. On rocks and stones. 
Type Locatity: Canada; type collected by Prof. John 
Macoun, July 10, 1884, on rocks on islands in Lake Nepigon; 
now in the museum of the Geological Survey of Canada. 
Leskea cyrtophylla is closely related to L. tectorum, differing 
from this species more especially by being somewhat papillose. 
It may be regarded as a transitional form connecting L. fectorum 
with Heterocladium papillosum Lindb. (An authentic specimen of 
the latter has been seen through the kindness of Professor Holz- 
inger and Mr. Harald Lindberg.) The type of L. cyrtophylla is 
flagellate and depauperate. Much better material of apparently 
the same has been collected in Colorado and Minnesota by Pro- 
fessor Holzinger. 
Rosemont, N. J. 
--ieemceniiaennceaneati 
