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† radiis infra articulum terminalem bracleisque
spuriis (radiis minoribus) articulatis.
(b. bracteis spuriis simplicissimis.)
7. N. Stenhammariana (nidifica) Wallm.
†† radiis omnibus infra articulum apicalem continuis.
8. N. borealis Wallm.
2. Genus Chara Le Vaill.
Caulis composite tubulosus, corticatus,
sulcato-stri-alus, in sicco slatu fragilis, plerumque strigosus vel
acu-Jeolatus (rarius simpliciter tubulosus, flexilis, Sect. I.)
Ver-ticilli basi involucrati. Ramenta simplicissima, ad genicula
bracteis subverticillatis instructa. Globuli epigyni,
extra-foliacei (rarissime pleurogyni.)
Sect. 1. Monosiphonicæ.
Nitella Ag. Endl.
Simpliciter tubulosæ, læves, inermes, flexiles habitu
Nitellarum. Ramenta ad genicula constricta, apice
brac-teifero-corniculata.
A. ßarbatæ, involucri aculeis elongatis, diainetrum
caulis superantibus; globulis pleurogynis.
(b. nuculis lateralibus.)
1. Ch. alopecuroides Del.
B. Imberbes, involucri aculeis abbreviatis; globulis
hypogynis, extrafoliaceis.
(†† Monoicæ — b. nuculis lateralibus.)
2. Ch. coronata Ziz.
Sect. 2. Polysiphonicæ.
Composite tubulosæ. Globuli extrafoliacei, hypogyni.
(B. Polysiphonicæ propriæ. Caulis inlernodiumque
ramentorum unum alterumve composite tubulosa,
corti-cata, sulcato-striata.)
1. Slrigosæ. Caulis saltim superne aculeatus vel
papillosus.
† Monoicæ.
Cinerascentes: Exsiccatæ cinerascentes, vel cretacei
coloris, collabentes.
3. (Ch. foetida Al. Br.)
— crassicaulis Schleich.
— hngibracteata Kütz.
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