FlytrapCare Carnivorous Plant Forums

Sponsored by

Discuss Drosera, Byblis, and Drosophyllum plant care here

Moderator: Matt

By rrrt
Posts:  42
Joined:  Sun Apr 18, 2021 4:01 pm
Hi everyone!

I understand that some sundews (e.g. D. capensis) are self fertile, and others (e.g. tuberous sundews) are not. Which other sundews are/are not self-fertile? Why might this be?

Thank you!
User avatar
By BumpyEvergreen
Posts:  50
Joined:  Sat Jun 23, 2018 10:52 pm
Yeah, as stated the Queensland sisters, pygmy sundews and tuberous Drosera aren't self fertile. I believe that the petiolaris complex (excluding drosera banksii) and South American dews aren't self fertile either, though I'm not sure about Drosera magnifica. The Drosera indica complex is self-fertile.

The main reason that self-incompatibility is favored over asexual reproduction, is because in areas of the world that undergo change rapidly, mutation is advantageous. This is because through sexual reproduction through multiple plants, the difference in dimorphism displayed by the seedlings allows for a higher chance that one of the seedlings is better suited for the environment than its siblings or parents. In short in areas of the world that undergo rapid change reproduction by seeds is favored because of the higher rate of adaptation/mutation present in seed grown plants.

Self compatibility is favorable in regions that change slower over time as asexual reproduction allows the plant in question to quickly spread over the environment it is used to so the large population will withstand change by brute force and lineage.

These definitions also depend on the type of plant in question as cacti do both in deserts.
Andrew072 liked this
User avatar
By evenwind
Posts:  2203
Joined:  Sun Jul 07, 2013 4:16 pm
Probably a good rule of thumb is if it's easy, common and cheap, it's probably self-fertile. For instance: spatulata, capillaris, natalensis, and burmannii.
By Andrew072
Posts:  82
Joined:  Wed Oct 18, 2023 4:40 am
Many South American drosera are self fertile. Some such as graomogolensis and ascendens seem to not be (definitely missed a bunch). Annuals and North American temperate species will generally be SC as well as a lot of South African species, excluding a few. The reason behind self-compatibility is not 100% uncovered to my knowledge, but for example, annuals will need to be able to propagate by seed because they die at the end of the growing season and need a way to consistently reset
Progress Pictures

I've left the window open and I can now see five i[…]

Drosera seedlings moldy

What kind of mixed drosera are you growing, @Wolfc[…]

If be careful about putting it against the shed. I[…]

This request is over two weeks old. If confirmatio[…]

Uh. That's not where that goes.

Are you feeding that thing any weird fertilizers[…]

bog garden

Under $20 for just the bog pot, or under $20 for t[…]

Please identify

I would say they're either spatulata or toka[…]

Weird Venus Flytrap

Someone bought a DCXL from them. Here's the phot[…]

Support the community - Shop at!