Thursday, October 16, 2025

Friends of many years in China

Hylotelephium (Sedum) spectabile

First of all, let me acknowledge the enormous privilege of travelling to Central China with the International Dendrological Society (IDS). I have been on trips with rock gardeners, perennial garden enthusiasts, cactus and succulent lovers--you name it. The IDS leaders and participants possessed a special passion, and a level of expertise that was humbling. As the season progresses, and as I sift through the hundreds (thousands?) of images I captured, I hope to do justice to the extraordinary woody plant richness we encountered in future blog posts. But why not start out with some old friends--what friend is as old and familiar as 'Indian Chief', 'Autumn Joy' or the other selections of what we all knew as Sedum spectabile for decades?


We saw this again and again in the QinLong and Daba mountains of Central China in September of this year--looking pretty much identical to what's sold at your local garden center.


If anything, the color was even a tad brighter in the wild populations than the older selections in gardens, like 'Indian Chief'. Although this is not a rare or otherwise "choice" plant for plant snobs, most any serious perennial gardener must have one tucked somewhere. I have several--although the annoying mule deer that think my garden is theirs love to chomp off the flowers. Have I ever told you how fond I am of venison?

Esther Kraak and Buddleja davidii

Even more widespread and abundant than the formerly Sedum, the common butterfly bush of our gardens originates precisely in these mountains of Central China. Here one of the very knowledgeable participants from Netherlands is showing off a bouquet she plucked along a trail we followed. The next frame shows these close up.


Of course, this Buddleja has a reputation for being terribly weedy in Maritime climates. We don't have any issues with it seeding in Colorado (that I know of) and some years it doesn't even die down very
far. Unfortunately it does need regular water to grow and bloom well. Oh well! You can't do everything.


I was charmed looking at the flowers up close.


We saw this gorgeous pine everywhere in Central China. I recall finding it quite a few times in Yunnan as well--I-Naturalist indicates that most of its range goes from Shanxi to Yunnan--with a fascinating concentration in Taiwan as well. I first saw this around the turn of the Millennium in a private garden in Moscow (Idaho), I was so charmed I made sure we obtained one for Plantasia, where we now have a superb specimen 30 or more feet tall that produces the relatively huge cones with delicious seed. We found people harvesting seed of this in Daba the Shan range.


A wildcrafter on the Daba Shan range demonstrating how the pine seed is extracted from the cone.

Adrian Bloom

I first met Adrian when he was on a lecture tour to the USA. I recall I drove him to Mount Goliath and we wandered down the trail surrounded with ancient Bristlecone pines (Pinus aristata). What a pleasure to spend two and half weeks with a Horticulture hero (and a friend of many years).                                                                                                                                                                                                                                                                                                                                                                                                                                                


Monday, October 13, 2025

Okay. Fall doesn't suck as much as I thought. Thank you crocuses!

Crocus speciosus* 

I know, I know: I've heard the litany "Fall is my FAVORITE season, so mellow, so soft, so gentle... the trees are even more colorful than Spring!" Fiddlesticks. Fall means Winter, which REALLY Sucks. Fall means damn leaves all over the place for weeks and months. It means it gets dark really early and stays dark late. Fall means cleanup and and and--then what? But then the corps de Ballet of Crocus speciosus begins their dance. In a prior post, with lots of better pictures of this, I suggested they reminded me of  Gluck's dance of the blessed spirits--which fortuitously was playing on our local NPR classical station this morning on my way to work. If you didn't click on the FIRST link, the second will take you to the Gluck--which I suggest playing as a background to these pictures (and perhaps on through Fall and the rest of your life). [I've added a special treat at the end the first 70 people who read this missed!**)

Crocus pulchellus
 
In cultivation this is usually much paler than C. speciosus, but I noticed that when I looked it up on I-Naturalist, a lot of the photos showed plants as dark and otherwise very similar to its more easterly cousin. This species is centered mostly on the Balkans, especially Greece.


We once had a wonderful colony of this at Denver Botanic Gardens that has diminished due to other plants encroaching, perhaps. But I am thrilled to have re-created that colony at the base of one of my rock gardens...I will do what I can to help these persist and spread. These are my autumnal balm, after all...

Colchicum boissierri

Now for a little story (I do have a lot of those, don't I?) I obtained this in 2006 (almost 20 years ago) from Jane McGary. It is either C. procurrens or C. boissieri (I purchased both from her that year--and in any case--they are now synonymized under the latter name. For a "stoloniferous" plant, it's not sending stolons out very fast! I took this one sunny day a week or so ago.


Same plant yesterday--under slightly overcase skies. A lot more flowers. Which is why gardening is so gratifying and fun. The garden changes from minute to minute as light shifts, and let's not talk about weeks, months or years.

A lot of colchicums bloomed last month while I was gallivanting around China, Washington D.C., Las Vegas and Dallas (to name the places I remember) so I missed even seeing them. I have had a half dozen or so crocuses also bloom. But there are always a few more waiting in the wings, to come out and do their dance and cheer me up. I have to admit, it's been a refulgent fall so far. I'm reconsidering.


*If you hadn't realized it by now, I'm a big fan of I-Naturalist (you can even follow my posts on that website at the bottom of my Blog Posts!). But I want to register a HUGE complaint about the Website. All sorts of idiots are posting their GARDEN pictures on the site--which really diminishes its usefulness in my opinion. Check out Crocus speciosus--which seems to have two major concentrations of distribution. The wild ones ring the Black Sea, while all the Northern and Western European are garden plants (and a few yahoos in the USA). I would LOVE it if the Garden photos were a DIFFERENT  COLOR so you knew they weren't wild. I realize the Man/Nature dichotomy is perhaps imaginary--but I'm not quite ready to subsume Mother Nature into the Anthropocene altogether yet. End of another rant. I rant a lot in autumn.

**Special treat:
Crocus speciosus and Impatiens cv.

When Nick Snakenberg, my colleague of many years saw that I'd posted on Crocus speciosus he whipped out his phone and showed me this picture he'd taken recently in his garden. I asked him to share it with me so I could post it here. Nick is our curator of Orchids at DBG, as well as supervising our extraordinary conservatory and most of the greenhouses. Some day [when perhaps I'm a tad more worthy] he may even let me visit his garden--which I have a hunch is a pretty good one!

Friday, October 10, 2025

A glimpse into the future! Denver Botanic Gardens at Chatfield Farms

New Crevice garden at DBG Chatfield

Twice in the last few years my colleagues have built ambitious rock gardens without my input or knowledge. Were I another, I might be miffed, or feel perhaps slighted. After all, I've come off a 3 year stint as President of the North American Rock Garden society. You'd think they'd give me an inkling at least at what they were up to. Since both of these efforts have turned out to be pretty damn magnificent, I'm just going to stay mum and pretend I was really part of the team....Fiddlesticks! What greater honor is there on the planet when your young colleagues outdo you at your own game? Maybe they were waiting to surprise me? They succeeded quite well if that were the case!



Of course we live in the shadow of the "Rocky Mountains" and any botanic garden worth its salt will have rock work since many of the best wildflowers grow and look best alongside rocks. I would like to mete out some credit here--except I don't know who from the remarkable team of horticulturists at Chatfield (under the guidance of manager of Horticulture Jennifer Trunce) to credit. I know that Grace Johnson (who has managed many of the great gardens at Chatfield) is now overseeing this pretty massive garden. Ryan Keating, an inspired garden designer, helped bring the crevice garden to its present state. The two pictures above show the West (top) and East (bottom) wings of the garden--which extends a long ways in both directions.


One of innumerable gems that dot the garden. I have never seen this in cultivation before anywhere. I note only three records on I-Naturalist. I have never seen it on my half dozen or so visits to Lesotho.


Jamesbrittenia jurassica

Another plant in the same genus I have also not ever seen myself on my trips. It also has only three records on I-Naturalist.


This has been blooming for a very long time...and looks mighty good on 10-10-2025 (our traditional date for first frost, incidentally: fortunately none in sight!)

Jamesbrittenia breviflora

Now I HAVE seen this quite often in the Drakensberg, as have quite a few people on I-Naturalist. Obviously I will be monitoring how these do over the next few


The label says the name. I have me doots that this form will be even as hardy as my collection on the Witteberg spur of the Drakensberg...


Alongside the crevice garden the Labyrinth has filled in very nicely with a wide assortment of rock plants...had to go take a peek. You can catch a glimpse of what the Labyrinth (and crevice garden's back side) looked like if you click this link.

Epilobium (Zauschneria) cana (californica)

This is one name change I am going to resist! 

Alyssum stribrnyi

One of the finest dwarf alyssums loving this new garden.


I can't stop admiring that damn Jamesbrittenia lasutica!

Phygelius capensis

A very happy clump of the high altitude form of Phygelius--doubtless collected in Lesotho by Mike Bone (Associate director of horticulture at DBG) and his team on one of his seed collection trips to the Drakensberg in cooperation with Katse Botanic Gardens.



Delosperma congestum 'White Nugget' resisting binary classification.

Eriogonum allenii

If you do not know this plant, do not pass go. Do not collect $100--click on this LINK and learn more.


I was at Chatfield for a meeting--and naturally had to linger in the magnificent native gardens that embrace the Earl J. Sinnamon Center designed and planted over a decade ago by Lauren Springer and maintained by a series of extraordinarily talented horticlturists. I forgot to note the Latin name on that Helianthus. Sorry! I'll see if I can add it in the next few days--pretty stunning, no?

Aster season

A half dozen kinds of daisies are blazing away in this garden...

Linanthus nuttallii

One of my favorite Western perennials has bloomed reliably for years (and many months within those years)--the best display  have seen of this wonderful phlox relative. It has a new Latin name I have forgotten (or repressed). 


Here is what that same taxon looked like at York Street before my beloved Wildflower Treasures was turned into a Potager. I'm over it. Really. Just ask my therapist.


The Gardens and Conservation committee toured some of the amazing acreage the Chatfield staff are transforming from hideous monoculture of Bromus inermis (Smooth brome--a horrendous Eurasian grass that has been deliberately sown over millions of acres of the West--utterly destroying the native vegetation in the process. Incredibly, it's still being sold and sown). Here is a well established stand of tall grass prairie next to the Wedding gazebo.


I believe this was sown this year. The Research Dept. is managing this process--I have been stunned how there were virtually no weeds whatsoever in any of these beds--and I looked.


I had to chuckle seeing the masses of Coreopsis tinctoria--a plant that's pretty local (if widespread) in Colorado. For the heck of it, I looked it up on BONAP and poor old Nevada seems to be the only state in the Continental U.S. where this doesn't grow natively...boo hoo! There's probably more in these meadows than in all the wild in Colorado! Such is the power of horticulture.


The Gaillardias were none too shabby for nearly mid-October! Incredibly variable in color...


This is one I'd like to save seed on...
Oh yes. Pumpkins!

Oh yes! Between today and Sunday afternoon 30,000 or more people will be coming to Chatfield farms to pick out pumpkins from the vast pumpkin fields. It's not too late to join them tomorrow or Sunday!

P.S. I have not done a proper, statistical analysis--but I suspect that if the respective attendance numbers of Chatfield Farms and D.B.G. York street were to be platted, there would be a year not too far hence when the former may eclipse the latter (provided we continue with the inspired leadership we've been blessed with most of my tenure). I would not be surprised if I were alive to see that year. (Just between you and me, I'm quite sure I will have retired well before that however!). Shall we take bets?

Friday, October 3, 2025

Hey! Y'all come visit me in TEXAS!

 

The great state of Texas--altitudinally


If you HAPPEN to be in or near Dallas in the next week you have TWO opportunities to hear me speak Sunday I'll be talking about how important Texas plants are in gardens across America (Click here to find out details: Treasures from the South)

Next Tuesday I speak to the North Texas Cactus and Succulent society at 852o8 Garland Rd. Dallas, TX 75218 on Superbloom in Namaqualand!

Hope to see you at one (or BOTH) events...



Wednesday, October 1, 2025

I Swear ta ya! One heck of a genus!

 

Swertia bimaculata

There weren't as many flowers blooming in September in Central China--we were in forest where trees and shrubs reigned supreme. Don't get me wrong--we saw dozens, probably hundreds of plants in bloom--but nothing to compare with Yunnan or Tibet in June and July a few years ago. One genus that delighted me, one with which I've had a bit of a destiny (as you will see) was Swertia.


I got a twofer with this shot: what a strange beetle that was! I wonder if it's a common pollinator. I love the lurid, dotted flower on this species--which we saw again and again on several mountain ranges in Central China. I would love to grow it!


The plants can grow almost a meter tall-- I didn't look carefully to see if it was perennial or monocarpic.

Swertia sp. ign. at Shennongjia National Park

Here is yet anotber Swertia--an undetermined species...there are a lot of these in China!

Lomatogonium bellum

Okay, I admit it's not QUITE Swertia--but close. I have often found Swertia perennis in the vicinity of Lomatogonium rotatum in Colorado--More on that later perhaps...they share a resemblance (not to mention overlapping much of their mutual range). This occurred at the highest point of our sojourn at Shennongjia National Park--a fantastic day of our great trip. And this taxon has a more than passing resemblance to yet another Gentianaceous cousin, Gentianella cerastioides.

They are not always so petite!

 Early in my career curating the Rock Alpine Garden at Denver Botanic gardens we grew Swertia kingii from an Index Seminum: it was magnificent! It was also monocarpic. Of course we've also grown Frasera--which now has been segregated into another genus. I don't agree with this...but let's not dip our toes in THAT taxonomic cauldron! By the way, there are only FOUR records of this Swertia on I-Naturalist (one of them being mine). Each is vast distances from the next--it is obvious that China is ridiculously underrepresented on that App. Compare it to the countless records for Gentianella cerastoides in Ecuador. 

Swertia banzragczii

While exploring Swertia, I found this image I took in the Altai Mountains of Kazakhstan fifteen years ago--a flower almost as peculiar as the spelling of its Scientific name!

Swertia perennis

I have photographed this many times, but unfortunately that was in the pre-digital era. I'm hoping Al Schneider won't object if I share share his image*. This is of course the commonest member of the genus, growing over a vast swath of Eurasia and North America.

It's well worth spending a few minutes scrolling through I-Naturalist and seeing what an amazing and varied group this is--even WITHOUT Frasera.  I Swear ta ya!

*Here's Al's website: Southwest Colorado Wildflowers



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