A Synopsis of Plant Phyla y 



the extreme frontier of the Vegetable Kingdom, and probably 

 to "be relegated to the Animal Kingdom. 



Class 4. CONFERVOIDEAE. Plants filamentous, simple or 

 branched, or a sheet of cells. 



Order Microsporales. Filaments iinbranched ; chromotophore 

 one, large, parietal, reticulated, or band-like, without pyrenoids; 

 propagation by hypnospores or biciliated or quadriciliated zoo- 

 spores ; generation unknown. 



Family 6. Microsporaceae. With the characters of the order. 

 Freshwater algae. Microspora, (Pf, I, 2, 84.) 



Order Schizogoniales. Filaments unbranched, often fused 

 laterally into broad parenchymatous sheets; chromatophore one, 

 central, stellate, containing one pyrenoid ; propagation by non- 

 ciliated spores (akinetes and tetraspores) ; generation unknown. 



Family 7. Prasiolaceae. With the characters of the order. 

 Freshwater and marine algae. Prasiola. (Pf. I, 2, 79.) 



Order Ulvales. Plant a sheet or tube of one or two layers of 

 cells, attached below; chromatophore one, parietal, containing 

 one pyrenoid; propagation by biciliated or quadriciliated zoo- 

 spores ; generation by biciliated isogametes. 



Family 8. Ulvaceae. With the characters of the order. Mostly 

 marine plants; a few in fresh waters. Ulva, Entcromorpha. (Pf. 



1, 2, 74.) 



Order Chaetophorales. Filaments visually branched; chro- 

 matophore parietal, usually one, and usually with one or more 

 pyrenoids ; propagation by biciliated or quadriciliated zoospores, 

 or by akinetes ; generation by isogametes or heterogametes. 



Family 9. Ulotrichaceae. Filaments unbranched; chromato- 

 phore a single parietal plate, containing one to many pyrenoids ; 

 propagation by biciliated or quadriciliated zoospores; generation 

 isogamic, the gametes biciliated. Ulothrix, Uronema. (Pf. I, 



2, 79-) 



Family 10. Chaetophoraceae. Filaments with attenuated mul- 

 ticellular branches, which terminate in multicellular hairs; chro- 

 matophore a single parietal plate, containing one or more pyren- 

 oids ; propagation by biciliated or quadriciliated zoospores ; 



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