(255) 
se aeuie short and slender ; odspores almost always shorter than 
0.5 m 1. C. pallida. 
Stipulodes longer and broader ; odspores 0.5-0.6 mm. long. 
2. C. Braunit. 
Bracteoles at least as long as the mature oe 
Stipulodes forming a double whorl 
i Sonmeinieee 
— eee at least in 
Fe C. Brittontt 
n part. 
icated stem-internodes very sy aaa covered by the cells. 
Teton bracteoles 0.1-0.3 m g. 8. ypnoides. 
Anterior bracteoles 0.4-0.7 mm. a g. 9. C oe 
Corticated stem-internodes completely covered by th 
cells, or almost so, 
Stems ae corticated, or very small secondary pees cells some- 
times 
Stipulodes ae a single whorl; leaves entirely uncorticated. 
4. C. crinitiformis. 
ss NA — a double whorl ; leaves at least partly singly 
co: ted. 
Pee nite 
Odspores with 14 or 15 striae 5. C. hirsuta 
oo with 10-12 striae. 6. C. evoluta 
7. C. canescens. 
Stems eects cone cated. 
tipulodes forming a single whorl 
‘ 16. C. Morongit. 
Stipulodes forming a double whor. 
Primary cortical cells more prominent, 
sae Sis 
with calcareous coating. 
nh and secondary cortical cells of nearly equal 
me . C. Schaffnert. 
es ia cells wider ae secondary. 
Posterior bracteoles very short, or none 
uC Gain: 
Posterior bracteoles not very short. 
. C. excelsa. 
Odspore without calcareous coating 
13. C. baltica, 
Secondary cortical cells more prominent. 
Posterior bracteoles usually twice as long as wide. 
14. C. intumescens, 
Posterior bracteoles little longer than wide, often teu 
15. C. vulgaris. 
Stems wea corticated, but by imperfect development of some of the 
s ary cells, usually appearing doubly corticated ; stipulodes 
ae single whorl ; at least the basal leaf- “internode uncorti- 
cated. 
Monoe 
Leaves cnirely uncorticate 
Ja 
d. 
Plants only slightly incrusted, usually light-green. 
