WILLIAMS: PERUVIAN MOSSES B20 
Ollantaytambo, about 3,000 m., May, 1915, Cook & Gilbert 
704d. 
Growing with Thuidium peruvianum. 
Globulina peruviana sp. nov. 
Inflorescence unknown: plants in rather compact mats with 
simple stems 1-4 mm. high, bearing radicles at the base and 
imbricate-appressed leaves rather uniformly placed along the 
stem or somewhat clustered at the apex and forming a globose 
bud about 0.5 mm. in diameter; stem in cross-section about 200 
in diameter with cells of outer walls not differentiated and with a 
distinct central strand; leaves rotundate or slightly oblong, 
about 0.5 mm. long, more or less cucullate, the flat margins 
crenulate half way down or more; costa vanishing abruptly a 
little below the apex, rather weak in the lower part, widest near 
the apex, slightly rough on the back and papillose on the inner 
face, in cross-section showing two rows of medium-sized, thick- 
walled cells on the dorsal side and a single row of much larger cells 
on the ventral side; cells mostly gradually smaller from the base 
to the apex of the leaf, more or less shortly rectangular below, 
12-16 u by 16-304, toward the apex square to rhomboidal, 
with sides 6-8 » long, finely papillose on both sides about the 
upper half of the costa, the marginal cells smooth; fruit unknown. 
(PLATE 17, FIGS. 8-15.) 
Araranca, south side of Roya Pass, about 4,100 m., April, 
1915, Cook & Gilbert 1774. 
Growing apparently on dry soil with Pogonatum polycarpum, 
at the highest elevation given for any of the collections. 
BarBuLa costata Mitt. 
Ollantaytambo, about 3,000 m., May, 1915, 
Orob. 
A small amount of what is apparently this species occurred, with 
immature fruit, growing with Brywm argenteum. tani a stage 
to be this also was found sterile, mixed with Leskea gracillima, 
at the same locality by these collectors, 6634. 
Cook & Gilbert 
BARBULA PRUINOSA (Mitt.) Jacq. 
Cuzco, on dry rock, 3,500 m., July, 1911, Foote 3. 
BARBULA REPLICATA Tayl. 
Cuzco, on dry rock, 3,500 m., July, 
tambo, about 3,000 m., on soil, May, 1915, 
1911, Foote 4, Ollantay- 
Cook & Gilbert 6100. 
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