Last week's blizzard day generated a laboratory crunch this week. Even in a survey type class, it takes more than a three-hour laboratory period to cover bryophytes. Typical, bryophytes just get no respect. So the rest of the morning will be spent rounding up the live specimens from the greenhouse so that they may be tortured all afternoon. As always Riccia seems to be missing. It always seems to get rediscovered, but usually too late. However you can always count on the marchantioid liverworts. Here's a nice image of one from the field showing the broad (~1 cm) ribbon-like thallus. The photosynthetic chambers each with a central pore are nicely evident, as is the dichotomous branching. Liversworts are quite uncommon anywhere in the maize and soybean desert; this image is from Washington near the home of the infamous Dr. Chips, who lurks around this blog from time to time. Like all bryophytes, and unlike all other land plants, the organism is haploid so that 2nd set of chromosomes is so over rated.