112 



The Canadian Field-Naturalist. 



[Vol. XXXV 



A lONTRlBUTlOX TO THE A1.GAE FLORA OF THE OKANAGAN 



(BRITISH COLUMBIA). 



By E. D. Sismey. 



CLASS MYXOPHYCEAE. 

 Order I. Coccogoneae. 



1. Dactjjlococcopsis montana W. & G. S. 



"West, in lake plankton. 



2. Mrrismopodia elegans Brann, in ditch- 



es, April. 



3. Aphanocapsa spec, not determined. 



Order II. Hormogoneae. 

 Family. Seytonemaceae. 



4. Scytonema myocJiros (Dillwyn) Ag- 



ardh, growing on rocks moistened 

 hy water at Peachland, May. 

 Family. Nostocaceae. 



5. Nostoc depressum. Wood, Pentieton 



Creek flume. May. 



6. X. microscopicum, Carmicheal, from 



squeezings -of a water moss resem- 

 bling Sphagnum, June. 



7. NofhiJaria spumigena var. genuina, 



Bornet & Flahault, in ponds Indian 

 Reserve, May. 



8. N. Harveyana (Thwaites) Thuret, in 



sloughs. Pen, May. 



9. Anahaena inequdlis (Kutz), Bornet & 



Flahault, small pond Indian Re- 

 serve, June. 



10. A. flosaquae, Breh, free floating in 



sloughs. 

 Family. Oseillatoriaceae. 



11. Phonnidium autionnale (-Ag) Gom, on 



wet rocks at Peachland, B. C, May. 



12. Oscillaforia limosa, Ag, in small pond 



Dog Lake. 



13. O. formosa, Bory, Pentieton sloughs. 



14. 0. gcniinaia, ]\lenes'h, outlet of a sep- 



tic tank, 

 lo. (). (Kjhd dii, Gom, in pond Dog ijake 

 with 0. princeps. 



16. 0. princfps, Vauch, free floating balls 



in small pond Dog Lake. This huge 

 Alga is uncommon. 



17. O. hoiydiia, Bory. at llic ontk't of a 



septic tank. 



18. Spindina major, Kntz, Pentieton TVoek 



in ponds, 

 in. N. iiif-neghliiidiiii, Zen;ii-d, moss sr|ucez- 



ings. 



Family Rividariaceae. 

 20. lin-iil(iri(i pisinn, Ag. in water moss, 



D'lg Lake; also on weeds. Ok Lake. 



21. Calothrix parasitica (Chauvin), Thur- 

 et, growing on a floating log. Dog 

 Lake. 



Peridinieae. — I have omitted this 

 group from this list not only because 

 I have no literature on the subject, 

 but because some authorities group 

 them among the Flagellates. What- 

 ever view is taken tjie Peridinieae 

 may be left out without spoiling the 

 general balance of the list. They are 

 naturally a subject for a special study. 

 The Peridinieae are of considerable 

 economic importance as they are large 

 storers of reserve food material, thus 

 forming a basic food supply for count- 

 less small organisms. 



Bacillarieae. — The Diatoms are 

 universally acknowledged to be a sub- 

 ject for a special study. As some 

 12.000 species (including fossils) have 

 now been described it is difficult to 

 attempt to enumerate species in a list 

 of this kind. At the .same time, as 

 Diatoms usually form a considerable 

 proportion of the plankton gatherings 

 I include several genera wit^ some 

 specific identifications in my plank- 

 ton notes of Okanagan Lake. In this 

 respect the diatoms are of special in- 

 terest in establishing periodieit}^ 

 curves, and also, en passant, a great 

 many points of biological interest may 

 be observed. 



CLASS CHLOROPHYCEAE. 

 Division I. Isokontae. 

 Order I. Protococcales. 

 Family. Volvocaceae. 

 Sub-family. Chlamydomonadeae 

 Chlamynomonas spec, in slough plank- 

 ton. Identification of species a mat- 

 tei- of great difficulty, there being 

 a diff<'rence of opinion among the best 

 aiilhoi-ities. The Genus Chlamydo- 

 nionas occupies a position of great in- 

 terest among tlie gi-een algae. It is 

 looked upon as the starting point in 



