(144) 
larger leaves often all green or partly green and partly pur- 
ple. These specimens have the cell walls less thickened and 
pitted than in the species (777). 
Hypnum Richardsoni (Mitt.) Lesq. & James. Dawson in 
swamps. In fine fruit July 27. This species is distin- 
guished from cordatum and giganteum, the two most closely 
related, I believe, by the shorter nerve, extending only 2 or ? 
up and often forking in the upper part. The perichaetial 
leaves are ecostate to faintly 3 costate (778). 
HHypnum Schrebert Willd. (Hylocomium parcetinum (L.) 
Lindb.) Lake Lindeman and Dawson, not fruiting (779). 
Hypnum stramineum Dicks. Lake Lindeman (780). 
Hypnum turgescens (Jensen) Schimp. Just below White- 
horse Rapids in dried-up swamp. Growing in broad de- 
pressed mats (781). 
Hypnum turgescens uliginosum Lindb. In swamps with 
the preceding. This variety has elongated stems and dis- 
tant, more or less spreading leaves (782). 
fypnum badium Hartmann. On margin of pond just be- 
low snow banks about 1000 feet above Lake Lindeman, also 
at Dawson on wet, shady bank. From the remarks in Les- 
quereux & James’ manual that ‘‘ It is considered by Mueller to 
be a form of 4. revolvens,” one would suppose the leaves to 
be somewhat similar to that species, but in fact they are very 
distinct. The median leaf-cells are only about 4 as long 
(.040 to .o60 mm.), the cell walls are thicker except at the 
points where the rounded ends overlap, where they become 
very thin and the leaf is differently shaped. In dadium the 
widest part of the leaf is near the middle and gradually 
tapers to a base only about 3 as wide. Above the leaf tapers 
rather abruptly to a sharp point. In revolvens the leaf base 
is wider, the leaf above tapers gradually to a long, slender 
point and the basal cells are much less differentiated. In 
badium there are usually one or two rows of well-defined, en- 
larged, oblong cells at base with occasionally an almost in- 
flated cluster in the angles. It is a plant of northern distri- 
bution, having been previously collected in Norway, Sweden, 
Greenland and Labrador (795). 
