I'm not sure yet.I think the N. miranda is a solid choice. What are the conditions in the greenhouse?
What are the criteria for a grade & how long until you're evaluated for the grade?This is important for it will be a both a grade but she is also willing to pay for it and wait a few weeks for shipping!
What are the criteria for a grade & how long until you're evaluated for the grade?
I would recommend something that few people have seen & has a bit of a 'wow' factor. Cephs are obviously 'cool' but quite slow-growing - as are many Neps.
Without knowing the answers to the questions above, I'd recommend a floriforous / robust Utric like the white form of U. sandersonii. The constant stream of beautiful flowers will impress and you can work on getting microscope pics of the bladders to help your grade. Another plant that could be impressive is S. psittacina. When it goes dormant, do a longitudinal cross section of a pitcher showing the lobster-pot trapping mechanism (& windows) with the backward-point hairs (definite "A" material).
In your climate, don't consider Darlingtonia -- yikes!
That sounds like one I could go for.Utricularia nelumbifolia has nice big umbrella leaves and has huge purple blooms & nice big traps, if you do consider nelumbifolia.
Sundews are 2easy.Wee with any sundew, you could show leaf cutting and how they grow into new plants. You could also show how leaves curl over their prey, maybe make a picture chart of some sort showing when the fly landed on the plant and when the sundew unfurled and the fly was dead.
Maybe a Capensis "Giant" or Wide leaf?
I currently have D. IndicaYa, personally I think that a large sundew could have tons of potential tests and cool observations. Plus, they definitely have sufficient wow factor. When I showed my clump of D. indica to people at a summer camp I worked at, they were blown away. I had left them outside for a few days, and they had tons of flies stuck all over them. D. indica would be cool to have, as it's fast growing, strong, and very aromatic, but you can't really do the leaf cuttings brinkerh420 made the great point of.
What about a D. regia?
I beg you to reconsider, but how about a south african dew? a nice red capensis could also be eye-catching
Isn't your teacher buying these for you? I'm sure a capensis under lights in a greenhouse would do fine. But if you don't like that idea, I think you could return to the N. miranda. Maybe a raff or bical? I'm growing an ampullaria in a terrarium with only a window to heat and light it, and it's doing fine. A large Lowland nep would be sure to please. Or maybe U. gibba? It's incredibly easy to care for and displays it's traps well.