| Morph. | Taxon Name | Obs.Width | Calyptra | Granules | DkRefr. | Necridia | Observed Description | ||
|---|---|---|---|---|---|---|---|---|---|
| 15 |  |
Nost | Nostoc spp. | 3-5 | Ranged in growth from individual trichomes to dense irregularly shaped colonies. Trichomes yellowish, 3-5 µm wide, 2-3 µm long and closely packed with colonies. Heterocysts present at both endings and within the trichomes; akinetes observed. Thin sheath surrounded the trichomes while a thick yellow mucilaginous sheath surrounded the colonies. Size of colonies ranged from 10 µm in diameter to over 10 cm2. Juvenile colonies with intercalary heterocysts also found. Dificult to identify to species level without cultures. |
Click on any image below to enlarge. scalebar is 10 µm
