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Sect. 2. Polysiphonicce. 



Composite tubulosae. Globuli extrafoliacei, hypogyni. 



A. Heterosiphonicae. Caulis composite tubulosus, corticatus, sulcato- 

 striatus. Ramenta simpliciter tubulosa, laevia, flexilia. 



1. caule substrigoso. 

 f Monoicae. 



0. involucri aculeis diametrura caulis subaequalibus. 



10 Ch. scoparia. Baler. 



b. involucri aculeis diametro multoties longioribus. 



11 Gh. Hornemanni Wallm. 

 ff Dioicae. 



* 12 Ch. Preissii Al. Br. 



2. cauli inermi. 



13 Ch. Hydropithys. Reichenb. 



14 Ch. fibrosa. A g. 



B. Polysiphonicae propriae. Caulis internodiumque ramentorum unum 

 alterumve composite tubulosa, corticata, sulcato-striata. 



1. Strigosae. 



Caulis saltim superne aculeatus vel papillosus. 



f Monoicae. 

 Gymnopodeae Al. Br. internodio basali simpliciter tubuloso. 



15 Ch. brachypus. Al. Br. 



16 Cb. Martensi. Al. Br. 



17 Ch. ceylanica. Willd. 



18 Ch. nudipes, Wallm. 



* 19 Ch. foliolosa. Muehlenb. 



20 Ch. polyphylla. Al. Br. 



* Ch. Michauxii. Al. Br. 



21 Ch. Wikströmi. Wallm. 



22 Ch. Commersoni. Al. Br. 



* 23 Ch. compressa. Kunth. 



Cinerascentes. Exsiccatae cinerascentes, vel crelacei coloris, colla- 

 bentes. 



24 Ch. squamosa. Desf. 



25 Ch. gymnophylla. Al. Br. 

 Ch. vulgaris. 



26 Ch. foetida. Al. Br. 



Ch. crassicaulis * Schleich. 



Ch. longibracteata * Kiirz. 



Ch. cespitosa * Wallm. 



Ch. sphagnoides. Wallm. 



* Ch. gymnoclada. Ganter. 



27 Ch. contraria. Al. Br. 



* 28 Ch. Kirghisorum. Less. 



* 29 Ch. Kokeilii. Al. Br. 



Ch. hispida. 

 30 Ch. hispida * Smith. 

 /J. gymnotiles. Al. Br. 



