187 
0.343 X 0.19 mm. Cells irregularly polygonal, becoming longer 
and narrower toward the summit, about twice as long as wide, 
averaging 0.047 X 0.022 mm. (Plate CL., figs. 1, 1a.) 
2. Liparis, Richard. 
Liparis liltifolia (L.) Richard. Testa oblong, slightly narrowed 
at base, about three times as long as thick, averaging 0.35 X 0.12 
mm. Cells regular, oblong, about three times as long as wide, 
averaging 0.05 X 0.017 mm. (Plate CL., fig. 2.) 
3. Carypso, Salisb. 
Calypso bulbosa(L.) Reichenb. (Calypso borealis, Salisb.) Testa 
oblong, tapering towards apex, about five times as long as thick, 
averaging 0.59 X 0.125 mm. Cells regular, oblong, averaging 
0.085 X 0.025 mm., thus over three times as long as broad. Inner 
cell wall finely reticulated. (Plate CL., figs. 3, 3 a.) 
4. TIPULARIA, Nutt. 
Lipularia unifolia (Muhl.) B. S. P. (Zipularia discolor, Nutt.) 
Testa oblong, acute, about four and a half times as long as thick, 
averaging 0.534 X 0.121 mm. Cells regular, oblong, about ten 
times as long as wide, averaging 0.15 X 0.015 mm, Inner cell 
wall closely, at times loosely reticulated. (Plate CL., figs. 4, 4a.) 
5. APLECTRUM, Nutt. 
Aplectrum spicatum (Walt.) B. S. P. (Aplectrum hiemale, Nutt.) 
Testa fusiform, about nine times as long as thick, averaging 1.36 
*0.153mm. Cells irregularly oblong, about eight times as long 
as wide, averaging 0.125 X 0.0168 mm. Inner cell wall banded 
with delicate parallel or branching lines. (Plate CL., figs. 5, 5 a.) 
6. CoRALLORHIzA, Haller. 
Corallorhiza innata, R.Br. Testa obovoid, about twice as long 
as thick, averaging 0.48 X 0.23 mm. Cells oblong, becoming 
polygonal at the apex, about twice as long as wide, averaging 
0.069 X 0.037 mm. Inner cell-walls sparsely banded, lines very 
irregular and obscure. (Plate CL., figs. 6, 6a.) 
Corallorhiza multiflora, Nutt. Testa oblong-obovoid, about 
five times as long as thick, averaging 0.70 X 0.172 mm. Cells 
longer and narrower than in innata, about three times as long as 
wide, averaging 0.065 X 0.021 mm. Inner cell-wall banded with 
parallel sometimes anastomosing or branching lines. (Plate CL., 
figs. 7, 7a.) 
