Tag Archives: hybrids

gardening, my garden

diversity

7 Comments

In the last post I mentioned that I was making hybrids with some of my pitcher plants. The process is a little klunky, and it typically takes a minimum of three years for plants to approach maturity. So why bother?

Here’s why I bother. Below are siblings from a single cross made by Rob of The Sarracenia Project blog, some plants of which he sent me a few months ago. It’s one cross, but just look at all the subtle–or not so subtle–variations from one plant to another. Traits from one parent combine with traits from the other. Sometimes one parent dominates, sometimes you see a perfect fusion of the two. Although the plants aren’t yet mature, they’re starting to show the characteristics they’ll carry on to adult-hood.

The parents are Sarracenia Bug Bat–photos of which you can view [ here ] at the really swell Carnivorous Plant Photo Finder site–and S. Diane Whittaker, viewable [ here ]. This is a complex cross, but the species that push their presence forward most are the extravagant S. leucophylla [ photos here ] and the stern and slightly sinister S. minor [ photos here ].

I don’t know about you, but I like to just stare at the plants and observe how the family traits express themselves. Additionally, most hybrids look different as the seasons change. Right now the final three are my favorites, but I’m looking forward to how these plant will develop though the summer and fall. Thanks for the hours of fun, Rob!


gardening, my garden

from seed, the labor-intensive version

14 Comments

While my last post was dedicated to an easy seed propagation project, this one details a couple that were a little more labor-intensive. Still not hard, just a little bit more work to pull off.

Sarracenia Night Sky, a hybrid of S. leucophylla and S. rubra gulfensis.

I’ve posted about my pitcher plants a few times before–Sarracenia species from the American South and some hybrids–and this is the first year I’ve tried sowing my own seed. All eight species (or nine, or ten or eleven, depending on the expert you listen to) are inter-fertile, and hybrids between all of them are possible and have been made at one time or another. The hybrids, too, are generally fertile, and you can go crazy with the genetic possibilities.

Sarracenia Dainas Delight, a complex hybrid of S. xWillissii and S. leucophylla.

For creative sorts you can arrange garden plants in interesting ways, but with this genus you could also design the very plants that you grow. If you live in the heart of pitcher plant country, this might be a problem. Bees could carry pollen from your hybrid plants to nearby native species and create some new unnatural hybrids. But the genus never crossed to this side of the Mississippi River so Californians can play Doctor Frankenstein all they want without worrying about messing with the native population beyond our castle walls.

A ripe Sarracenia flava seed pod, picked mid-November.
Mature seed pod of Sarracenia flava.

So…I began in the spring making some hybrids, and the pods began to ripen in August, with the last pods just finishing up ripening right about now.

Closeup of the previous Sarracenia flava seedpod. This one contained almost 500 seeds. You can see them practically jumping out of the pod.

The seeds require a cool, damp period in order to germinate. I emptied the pods and put the seed in a plastic bag with a few strands of moist chopped sphagnum moss, one bag for each cross. And into the fridge they went for four weeks.

After this period of cold stratification I sowed the seed on the surface of chopped sphagnum moss which I’d layered on the top of post filled 50/50 with a sand/peat mixture.

Next, I put the pots into a clear plastic box, poured in half an inch of standing rainwater, closed the lid, and put them near a window that faces south-southeast. If everything goes well–and it looks like it did–the seedlings begin to emerge in two to four weeks. Warmish weather is best, though you don’t have to be too fanatical. This batch experienced the recent 90- to 100-degree days as well as many cooler days in the 60s. As long as the seed think it’s spring, they’ll begin to germinate.

That’s pretty much it. Some people place the seedlings under constant bright lights and 70-plus degree temperatures for up to three years to speed them up to maturity. I’m hoping that bright daylight in a warmish interior spot will give them enough of a boost that I don’t have to resort to the equivalent of putting the plants on steroids.

Yearling sarracenia seedlings of the cross S. (Melanorhoda, Triffid Park x rosea luteola).

And here you see the reason why people might try to accelerate growth. These are year-old seedlings from a cross by Brooks Garcia that I sowed a year ago, thinking I’d practice on someone else’s cross before attempting my own. I grew these in my unheated greenhouse which has fairly low, less-than-ideal lighting conditions. They did get some bottom heat during the coldest months of the year.

Drosophyllum lusitanicum, a couple months old.

The other carnivorous plants I’m propagating this fall are of this Mediterranean-region species, Drosophyllum lusitanicum. While virtually all carnivorous plants are creatures of swamps and bogs, this one is unique in that it comes from fairly dry areas with be limited summer rainfall. Unlike the preceding sarracenia bog plants, this species could actually thrive in California’s wet-winter, dry-summer climate without too much additional life support.

Its common name is “Dewy Pine” because the leaves have little tentacles tipped with sticky bug-catching fluid that looks like dew. But Barry Rice mentions a much cooler moniker: Its Portuguese name translates into “Slobbering Pine.”

This plant and the preceding Sarracenia do catch insects. It’s a contradiction I’m trying to come to terms with. I plant a lot of California native plants, which provide nectar and other food for all sorts of winged and crawling creatures. And then I have these little monsters that actively trap and consume them. Call me a man of contradictions. In the end I hope I’m doing lots more good than bad.

I only know of one seller who ships Drosophyllum so you pretty much have to grow your own from seed if you want one. (I got my seed from the seed bank of the International Carnivorous Plant Society.) The little black seeds have a hard coat that slows down germination. If you have some 220-grit sandpaper around that’s not a problem. Just lightly–and I mean lightly–rub the seed between two sheets of the sandpaper until a patch of the black seed coat is worn away to reveal the white layer underneath. Then pop them on top of the same mixture you’d use for germinating Sarracenia and keep the mix moist with good-quality water. Germination for me was about two to six weeks, no cold stratification necessary.

There you have it. With both of these kinds of plants it was a little more work than my last post growing bladderods from seed. But really, it isn’t that hard if you’re patient.

gardening, my garden

fun with hybrids

4 Comments

There are over a quarter million plant species known to biology. Of those more than 5,000 can be found in California, and 1,500 in San Diego County alone. With so many amazing plant species out there I still find myself being interesting in hybrids between the pure species.

My last post was on Sarracenia, the North American pitcher plants. The genus appears to be fairly new to the world in evolutionary terms, and all the species in the genus will hybridize easily with any of the others. And all these hybrids will continue to interbreed with the parent species or other hybrids. When you find a bog with two or more species in it, chances are good that you’ll find intermediate plants with traits of all the species present in that location.

This drives biologists crazy. Finding a plant that’s a pure species can be a major headache when the plants are out there, frolicking in the mud. But evolutionary biology acknowledges that hybrids can introduce new genes into a plant’s gene pool so that they might be better equipped to withstand some stressors that a pure species might not.

Sarracenia Judith Hindle

In addition to possible evolutionary advantages, a hybrid plant found in nature can be a really cool-looking mongrel. And human-created hybrids that have been selected for specific traits over generations can begin to take a species or genus in directions nature would never have imagined.

Here on the left is the Sarracenia hybrid Judith Hindle. I first encountered mass tissue-cultured numbers of it in the flower aisle at Trader Joe’s a couple years ago. It’s a pretty great-looking plant by itself, but imagine a whole store display of it. This human created selection derives from three species, and its pedigree can be notated: ((Sarracenia purpurea x S. flava) x S. leucophylla) x ((S. purpurea x S. flava) x S. leucophylla).

Sarracenia purpurea var burkii syn rosea

Doing the math, you an see that it’s one-fourth S. purpurea, this species. (My photo here isn’t the exact parent, just one general example of what this variable species can look like. Several taxonomists have decided that this plant I’ve shown you, S. purpurea var. burkii, is actually a new species, S. rosea, but it looks quite similar and you can get the general idea…)

Sarracenia flava coppertop

Another quarter of the ancestry comes from S. flava. (You might recognize this same photo from my last post. Once again this is just a rough estimation of what the parent looked like. It’s actual great-grandparents were S. flava var. rugelli, a plant with pure green pitchers with a red patch in the throat.)

sarracenia-leucophylla-tarnok

And the final two quarters of its ancestry comes from the gorgeous S. leucophylla, the white-topped pitcher plant. I find myself comparing the hybrid with the parents, trying to see the characteristics that came through in the final hybrid. Clearly S. leucophylla has the most influence in this cross.

Sarracenia Dixie Lace

Here’s another common sarracenia, S. Dixie Lace. Larry Mellichamp, its breeder, isn’t 100% certain of its parentage, but he estimates it to be: (S. leucophylla x S. rubra) x (S. psittacina x S. purpurea). It shares two parents with Judith Hindle above, but introduces two new species into the mix.

Sarracenia rubra gulfensis ancestral form

The presence of this ancestor, S. rubra, is subtle, and is probably most manifested in the somewhat upright-growing pitchers and the robust growth habit. (Once again, the plant I’ve shown is only a close approximation of the S. rubra var. wherryi that was used for the actual cross. And yet again, this latter species has been classified as a separate species by some taxonomists.)

Sarracenia psittacina giant form

The final ancestor is S. psittacina, a plant that’s practically impossible to hide the presence of in any hybrid. The leaning growth habit and patterning of the pitchers takes several generations to fade into the background.

Salvia sagittata leaves

Hybrids can happen anywhere. In the irrigated part of my garden I have a few sage species from Europe and the Americas. These are the leaves of Salvia sagittata, the arrow-leaved sage, a plant from Ecuador.

Hybrid Salvia Seedling

Next to it I noticed a young plant which at first I thought was a seedling of the of its neighbor. It has the same light green coloration and coarse leaf texture as does S. sagittata. When I started looking closer at the leaves, however, something seemed a little off. Instead of the distinct arrow shape, the leaves are closer to oval. Seedlings sometimes take a while to develop their mature characteristics, but I started thinking that it might be a hybrid of S. sagittata with one of the other sages nearby.

Salvia nemerosa Snow Hills leaves

Three feet away is S. nemorosa. It also has coarse-textured leaves, but they’re smaller, darker green and rounder (probably “linear” to “oblong” with a “cordate” leaf base, according to the leaf morphology charts).

Salvia Hot Lips leaves

And about six feet away are several plants of the popular ‘Hot Lips’ cultivar of S. microphylla, a species from Texas into Mexico. Its leaves are smooth, much smaller, darker green and also more rounded. (I guess I’d call it an “ovate” leaf form with an “obtuse” leaf tip.)

Who do you think might be the father? I’m leaning towards S. nemorosa.

The seedling sage found a clearing in the middle of a little walkway to germinate. I’ll let the seedling bloom to see if it’s interesting–or if it’s even a hybrid at all. Seeing the flowers should help me better guess what its parents might be. If it’s worth keeping I’ll transplant it out of harm’s way. If it’s not, I’ll treat it as any other unwanted garden colonizer. Whatever the case, it’ll be an interesting little experiment.

Topic for a future post: What’s bad about hybrids?