Dianthus nardiformis – Botanically Inclined

Updates and Dobrogea self-guided tour

An update to the HWT treatments of last week: Anthyllis montana and Astragalus missourinesis seeds were the first ones to react; they were sown and the first Anthyllis montana seedling showed up this morning!

It seems that not all Anthyllis are equal, Anthyllis vulneraria var. coccinea seeds were slower to imbibe, and are still receiving boiled water ‘showers’ at times; the same applies for Lespedeza violacea.

The first warm germinators are also showing up, with the fast germinating (less than one week) seeds of Dianthus nardiformis and Salvia canescens var. daghestanica.
This year I sowed less ‘rarities’ and more leftover seeds of species that I would like to have in greater numbers, and of which would be also good to have more seeds to share with the world.

I praised the Salvia canescens var. daghestanica many times. It is a short lived species here, but very easy to grow from seeds. If you are a sucker for silvery foliage like me this one should not miss from your rockery, scree garden or any other, dry and sunny area.

Dianthus nardiformis in wild habitat, Dobrogea region, Romania

The other species to praise is Dianthus nardiformis ex. Dobrogea, a late summer flowering Dianthus with very fine foliage. It is long lived but got shaded by other plants and didn’t flower well lately.

That’s why we always keep some ‘reserve’ seeds ;) The form grown from wild coll. seeds in Dobrogea is worth taking care of being slightly different than what usually goes around under this name (which I have also grown).

The seedlings of Dianthus nardiformis took me back the memory lane to their sunny and wind swept home, in Dobrogea region of Romania, close to the Black Sea.

Few other species like Centaurea jankae, Paronychia cephalotes and Thymus zygioides are adorning my garden now as a good remembrance token. Those interested are invited to have a self-guided tour of the region and explore some of its plants treasures.

Winter getaway – Dobrogea I

Winter getaway – Dobrogea I

Winter getaway – Dobrogea II

Winter getaway – Dobrogea II

Plant portrait: Centaurea jankae

Plant portrait: Centaurea jankae D. Brândză

February 23, 2024

Playing the epigenetics: Helichrysum arenarium

Botanical travels, Plant explorers, Propagation

Epigenetics is a scientific field in high fashion and moving fast nowadays. Although the term was coined in 1942 by C. H. Waddington and scientists have been working since to elucidate the mechanisms involved, it is only recently that the mainstream media has been inundated by articles on epigenetic themes.

Very concise and without details, the field of epigenetics deals with the modifications induced by various external factors on any given organism and their consequences. The actual genetic making of the organism is not changed; epigenetic modifications only affect how various genes are expressed and are switch on or off (“epi” means “above” in Greek hence the epigenetics = factors beyond the genetic code. Most importantly, some of these changes can be inherited from a generation to another.

Referring strictly to plants, the study of epigenetics is underway and there is still much to learn.
I’ve read that “Plants are masters of epigenetic regulation” and it is not hard to understand why: they cannot move, so they have no choice but to adapt continuously to the changing environment and other stimuli.

Silene compacta in habitat

On a practical level, we can speculate that the epigenetics explains why some species and especially those living in extreme habitats (alpine regions, deserts…) are some of the hardest to adapt to garden cultivation even when provided with close by conditions.
Also, epigenetics might explain the differences in germination patterns of a given species, in case of mother-plants originating from different geographical areas.

It is already known by gardeners that the more different your climate & garden conditions are than the ones where a species grows wild, the more difficult it will be to ‘tame’ it into cultivation and hardiness is not the only factor.
The first generation of seedlings express the traits inherited from the mother-plant and they react accordingly in relation to seasonal temperatures, substrate, light intensity, water regime…..

By growing a second generation seedlings from the first ones, and then a third one and so on….we have increasingly higher chances to obtain better ‘tamed’ plants for our specific garden conditions. They will look exactly the same as the original mother-plant, but their adaptation to the local variations in temperatures, water regime, humidity and so on, will be improved.

To exemplify:
Last summer, Helichrysum arenarium (sandy everlasting) successfully flowered in my rockery and set a few seeds; later in the fall it ‘disappeared’ despite growing in a very well drained spot.

Helichrysum arenarium ex. Dobrogea, flowering in August, 2021

The species was grown from wild collected seeds in the Dobrogea region of Romania, which has a very different climate than we have in SW Ontario, so it was no big surprise that it didn’t last long.

It is a very lucky situation when a few seeds are available to obtain a second generation of seedlings. There is hope that they will adapt better to the new environment in the next generation.

Other species also managed only a first flowering: Paronychia cephalotes, a couple of Minuartia and Centaurea jankae.

But others grown from seeds from the same trip adapted well: Dianthus nardiformis, Centaurea orientalis, Alyssum borzeanum, Aurinia saxatilis, Sedum urvillei, Silene compacra, Ephedra distachya and Iris suaveolens.

Virtual traveling to the region in question available below:
Winter getaway – Dobrogea I
Winter getaway – Dobrogea II

Dianthus nardiformis, garden

Hedysarum grandiflorum, garden

Allysum borzeanum

Iris suaveolens, garden cult.

Sedum urvillei, garden cult.

Centaurea orientalis

And/or read more about epigenetics in plants (there are many other articles available).
Epigenetic Regulation in Plants

February 11, 2022

Winter getaway – Dobrogea I

Botanical travels, Plant portraits, Propagation

Well, the trip interruption was a bit longer that I would have wished, but here we are on the road again (see first part of the trip here). In order to beat the polar vortex that descended upon us we need sun & flowers!

As I said, the drive from Southeastern Carpathians to Dobrogea region is not very long, depending on the destination it can take 4-5 hours. The Dobrogea region (with Dobrogea Plateau) in Romania is surrounded to the north and west by the Danube River and to the east by the Danube Delta and the Black Sea. Most visitors are aiming for the Black Sea sand beaches, bird watching and/or fishing in the Danube Delta, and very few aim to enjoy the particular flora of the region.

Given its position, the climate is slightly warmer and more arid than in the rest of Romania, winters are cold but with less snow and the flora is very specific with a combination of endemic plants and various species at their geographical limits. It is a special ‘meeting’ place for species of Mediterranean, Eurasian and even Caucasian origin!

Even if in late July it is very hot and dry and many species are at the end of flowering, there is still a lot to explore. I will start with a few Caryophyllaceae to keep the continuity and then show various other species.

Dianthus nardiformis is an endemic of this region and luckily being a late flowering species it was still very showy; photographed on the dry, exposed, rocky hills of Enisala fortress and everywhere else. Striking especially when dispayed against the lichens laden rocks.
Cultivated for a long time, this Dianthus makes for a good garden plant, although not as tidy (foliage speaking) as other species, but extremely floriferous, hardy and long lived. There is an impressive specimen at Montreal Botanical Garden to testify it.

Dianthus nardiformis

On the same dry, rocky hills surrounding Enisala fortress, it was a nice surprise to find Paronychia cephalotes. I have a young plant grown from seeds of Crimean accession in the rockery, and I look forward to see it flowering. However, seeing a species ‘perform’ in the wild is always much better!
It is a mat forming species with white, papery bracts posing as ‘flowers’. It is hard to think it belongs to Caryophyllaceae at a superficial look.

Paronychia cephalotes and Thymus zygioides, Dobrogea July 2017

From the neglected genus Minuartia, I will note Minuartia adenotricha, a species that you will also found on the other side of the Black Sea, on the Crimean mountains.

Minuartia adenotricha, Dobrogea 2017

Gypsophila pallasii is a similar species with G. glomerata offered in the seeds shop (as well of Crimean origin); doing very well on the dry, rocky substrate in the company of Echinops, Artemisia, Xeranthemum, Astragalus, Allium ssp. and many others.

Gypsophila pallasii at Capul Dolosman, Dobrogea 2017

A must have stop for plant lovers in Dobrogea are the Macin Mountains located in Tulcea County. These are among the oldest mountains in Europe, formed during the Hercynian orogeny with the predominant rock – granite, but also sandstone limestone. Their specific look is given by the eroded granite formations.
Although a very, very long time ago these mountains were taller than the Carpathians; today the highest point is Ţuţuiatu/Greci Peak with an elevation of 467 m above sea level.

Macin Mts., Dobrogea, Romania

In the quite dry-looking landscape of late July, Silene compacta stood apart with its rich magenta inflorescences. It is not difficult to assume that full sun locations and super good drainage would be mandatory for its successful cultivation.