42 
f radiis infra articulum terminalem bracleisque 
spuriis (radiis minoribus) articulatis. 
(b. bracteis spuriis simplicissimis.) 
7. iV. Stenhammariana (nidifica) Wallm. 
f f radiis omnibus infra articulum apicalem continuis. 
8. iV. borealts Wallm. 
2. Genus Ghata Le Yaill. 
Caulis composite tubulosus, corticatus, sulcato-stri- 
atus, in sicco statu fragilis, plerumque strigosus vel acu- 
leolatus (rarius simpliciter tubulosus, flexilis, Sect. 1.) Ver¬ 
ticilli basi involucrati. Ramenta simplicissima, ad genicula 
bracteis subverticillatis instructa. Globuli epigyni, extra- 
foliacei (rarissime pleurogyrii.) 
Sect. 1. Monostphonicce. 
Nitella Ag. Endl. 
Simpliciter tubulosæ, læves, inermes, flexiles habitu 
Nitellarum. Ramenta ad genicula constricta, apice brac- 
teifero-corniculata. 
A. Barbatæ, involucri aculeis elongatis, diametrum 
caulis superantibus; globulis pleurogynis. 
(b. nuculis lateralibus.) 
1. Ch. alopecuroides Del. 
B. Imberbes, involucri aculeis abbreviatis; globulis 
hypogynis, extrafoliaceis. 
(ff Monoicæ — b. nuculis lateralibus.) 
2. Ch, coronata Ziz. 
Sect. 2. Polysiphonicce, 
Composite tubulosæ. Globuli extrafoliacei, hypogyni. 
(B. Polysiphonicæ propriæ. Caulis internodiumque 
ramentorum unum, alterumve composite tubulosa, corti¬ 
cata, sulcat o-slriata.) 
1. Strigosce, Caulis saltim superne aculeatus vel 
papillosus. 
f Monoicæ. 
Cinerascentes: Exsiccatae cinerascenles, vel cretacei 
coloris, collabentes.. 
5. (Ch. foetida Al. Br.) 
— crassicaults Schleich. 
— longibracteata Kiitz. 
