Weeds – a curious nature

One of the Most Aloof Sunflowers Ever! The Cowpen Daisy

Part 3 ….. An Allelopath Declares Chemical Warfare

August 15, 2025

The more I learn about Cowpen Daisy (Verbesina encelioides), the more the words Intrepid (fearless and bold), Interloping (meddlesome and smothering), and Impertinent (pushy and rude) come to mind.

Cowpen Daisy is literally a plant at war …..

Its adversaries are neighboring plants …..

Its weapons of choice are chemicals ….. 15¹different Allelochemicals² to be exact.

Cowpen Daisy shows no mercy to its most susceptible victims, and given the right conditions in the right locations, Cowpen Daisy can cripple ecosystems, and unravel biodiversity.

Oh No! What Have I Done! Have I unleashed a formidable enemy to run amok, bullying its way through our mostly intact biodiverse high desert ecosystem?

Maybe not! (Spoiler alert…… Allelopathy³can be bad, but I still love this happy Daisy)

On August 6th, I received an excellent question from one of my blog followers, based on my first Cowpen Daisy post :

“Do you have any concerns about this becoming an invasive plant? Best wishes, Nancy”

In reply, I expressed my concern about the number of “seedlings coming up late spring,” and how “I was definitely alarmed and wondered about the need for early control.” Fortunately, “as the season advanced, it became clear the density of plants seemed self-controlling.” Based on my limited experience with Cowpen Daisy, I explained how during the summer of 2023 “the plant completely covered an extremely large field near our home,” causing me concern about its invasive tendencies. But upon “[R]eturning the following year (2024) and again this past spring (2025) to see if the same field was blanketed again in these plants, “I couldn’t find a single Cowpen Daisy anywhere! So no, this annual [doesn’t appear to be] “invasive, at least not in central New Mexico.”

But Nancy’s question prompted me to dig deeper into on-line research. I wondered: Is Cowpen Daisy invasive outside of its native range, particularly where conditions are ideal for its aggressive growth? Yes, it is! And its invasiveness is further enhanced where neighboring plants are susceptible to the impacts of the allelochemicals released by Cowpen Daisy’s leaves, roots and decaying leaf matter in the soil.

One example where Cowpen Daisy is an introduced species and has become invasive is in India. Fields of mung bean, corn, chickpeas, and sweet melon are being outcompeted by invasive stands of Cowpen Daisies. These food crops are severely impacted by two allelochemicals released by the both roots and leaves of the Daisy; steroids and phenols. Studies of these four crops demonstrated not only “the suppression of germination and growth in these plants” but “also revealed an antagonistic effect on [their] chlorophylls, carotenoids and protein levels.” In other words, Cowpen Daisy is winning the war against India’s mung bean, corn, chickpea and melon crops, and farmers are currently engaged in a battle to develop a strategy of control and run this biological enemy out of their country.

Cowpen Daisy is only considered a native species to the Southwest U.S. and Northern Mexico. However, it has been introduced (either intentionally or by accident) and is considered naturalized in parts of Eastern North America, the Middle East, Spain, Argentina, Australia and the Pacific islands. As such, Cowpen Daisy’s nature to drop allelochemicals everywhere it grows allows it to behave like an invasive plant in countries where it is naturalized. Without diligent management (via herbicide application or mechanical control), it can thrive to the detriment of their desirable plant species’ survival.

Have I defeated my goal of reestablishing a diverse native plant community in disturbed areas surrounding our new home? “Not likely,” says I, optimistically! In addition to Cowpen Daisy, the variety of native plant species I intentionally seeded last fall and early this past spring, have germinated, grown, flowered and seeded or are in the process of flowering and seeding, most of which are adjacent to a Daisy. Of course time will tell. Meanwhile, I’ve declared this to be a happy ending to this post and my stand of happy Cowpen Daisies! However ……. next spring, if germination rates from my reseeders are low or zero, but Cowpen Daisy returns with renewed vigor, then I have a control job waiting for me. And the best advice I’ve read is to “pull out old plants and roots and selectively remove new seedlings.” That’s acceptable! That I can do!

Until then!

Do you struggle with weedy, invasive plant species in your garden or yard? Have you seen fields of blooming weeds and wondered …… “what weed is that?” Do you know the names of those pesty plants and do they seem to keep your favorite variety of cucumbers from growing? It might be interesting to learn if your local invasives are one of the many Allelopaths happily growing in our world! Let me know!

As always, thanks for dropping by!

¹Cowpen Daisy is known to release up to 15 different allelochemicals² from its leaves and roots, such as guanidine, phytosterols, phenolic acids, tripertenes, flavonoids, dicarboxylic acids, phytophenols, steroids, phenols, and others. Fresh and decaying leaf litter leach 14 of those allelochemicals into the soil.

^2,3Allelopathy is a biological phenomenon by which an organism produces one or more biochemicals that influence the germination, growth, survival, and reproduction of other organisms. These biochemicals are known as allelochemicals and can have beneficial (positive allelopathy) or detrimental (negative allelopathy) effects on the target organisms and the community. Allelopathy is often used narrowly to describe chemically-mediated competition between plants. Allelopathic interactions are an important factor in determining species distribution and abundance within plant communities, and are also thought to be important in the success of many invasive plants. (source: Wikipedia)

Random Wanderings; Destination North

August 15-20, 2024

Felix parked along the Old Spanish Trail route, south central Colorado

With no defined route or objective, we decided it was high time we hitch up the trailer (Felix) and tote it north just to see what’s going on in south central Colorado this time of year. As we made our way through the San Luis Valley, we found acres of lush greenery topping almost-ready-to-harvest potatoes. Alfalfa was nearing its second cutting. Carrots had already been shipped to market. The wildlife refuges were patiently awaiting the arrival of migratory birds. And the last of the summer tourists were excitedly boarding the Cumbres and Toltec Scenic Railroad in Antonito, for the 64 mile steam engine journey to Chama, NM.

Day 1. Our first stop was in northern New Mexico, just south of Tres Piedras, Carson NF. An unlikely dispersed camping spot that I nicknamed “Puffball Meadow.” A nice level spot adjacent to a dry stock pond. The meadow was full of fist sized puffball fungi, and a coyote paid us a visit during the night.

We enjoy boondocking on our public lands managed by the US Forest Service and Bureau of Land Management. Having a trailer that’s self-contained, we can easily find lovely off-the-grid areas to set up camp. And thanks to our solar panels (and lots of sunny days) and large water tank, we can stay out for up to 5 days without needing refills. This allows us to explore lesser visited areas, which suits our tastes beautifully!

Day 2. Made it to the San Luis Valley, Colorado. Wandered around until we found a wide open area of dispersed camping in the vicinity of the Old Spanish Trail. Lots of wildflowers blooming, and plenty of hiking opportunities.

But I think one of the best things about random travel is the spare time …… we drive for 3-4 hours, find a place to camp ….. then the rest of the day involves hiking, wildlife watching, nature journaling, collecting drawable items, photography, more sketching, identifying the unknowns, reading, napping, and a bit of ukulele strumming! Perfection!

Day 3. We enjoyed the area so much, Roy suggested we stay for another day! And then he found this weathered mule deer jaw bone.

Day 3, continued. Magpies! Can’t understand why these gorgeous birds don’t come south at least as far as Albuquerque and East Mountains.

Although the 6-day trip wasn’t remarkable, it was good to get away. Scattered about this post are my journal pages highlighting Days 1 to 5.

Day 4. Our travel route as we made our way to a campground to charge our battery and top off our water tank. An inconvenient, unplanned for detour led to future camping possibilities.

On Day 4, we decided to make our way up and over Slumgullion Pass (11,530 ft) on our way towards Gunnison Country. Not having been this way in years, we really enjoyed the crisp mountain air and spectacular views up and over the Pass. The villages of Creede and Lake City have grown swollen with tourist amenities and summer cabins dotting the once open meadows. As we got closer and closer to Lake City, we couldn’t help recall the story of Colorado’s notorious cannibal, Alferd Packer. Wanting to reread the tale as we passed near Cannibal Plateau and Deadman’s Gulch, the crime scenes, here’s what I found:

Brief Background: Alfred Packer (newspaper misspelling as “Alferd” Packer, which stuck) (1842-1909) was a prospector who set out for Colorado gold fields in 1873. By the winter of 1874, he reached the rugged San Juan Mountains with a party of five men where they became lost and stranded during one of the worst winters on record. The men, with only had 3-4 days provisions quickly consumed and no firearms, were forced to cook their rawhide moccasins. Places where “snow had blown away from patches of wild rose bushes,” ….. they “were gathering buds from these bushes, stewing them and eating them.”

When the snow finally crusted over, Packer, the only man to survive the ill-fated trip, walked out of the mountains after 60 days. He told a story about the demise of his fellow prospectors, and how he managed to survive by eating them. His story involving cannibalism became legend, and continues to be passed down to today! (Whether the story is true or not will never be known, but it makes for colorful history.)

Based on historical records and news reports, Alferd Packer was tried several times for murder and cannibalism (even though the act of cannibalism wasn’t considered illegal in the US). Convicted of these heinous crimes, Judge M.B. Gerry supposedly uttered this famous quote while handing down the sentence in Packer’s first trial ……

“Stand up yah voracious man-eatin’ sonofabitch and receive yir sintince. When yah came to Hinsdale County, there was siven Dimmycrats. But you, yah et five of ’em, goddam yah. I sintince yah t’ be hanged by th’ neck ontil yer dead, dead, dead, as a warnin’ in reducin’ th’ Dimmycratic populayshun of this county. Packer, you Republican cannibal, I would sintince ya ta hell but the statutes forbid it.”

This is the quote I’d grown up hearing many times, over and over and over! It makes for good reporting, but is a ways from the actual sentence and what Judge Gerry sounded like while reading it (nope, he didn’t talk like Yosemite Sam!). Here’s what the record shows:

“Alfred Packer, the judgment of this court is that you be removed from hence to the jail of Hinsdale County and there confined until the 19th day of May, A.D. 1883, and that on said 19th day of May, 1883, you be taken from thence by the sheriff of Hinsdale County to a place of execution prepared for this purpose, at some point within the corporate limits of the town of Lake City, in the said country of Hinsdale, and between the hours of 10 A.M. and 3 P.M. of said day, you, then and there, by said sheriff, be hung by the neck until you are dead, dead, dead, and may God have mercy upon your soul.”

Alfred Packer tombstone in Littleton Cemetery where he was originally buried in 1909. Today, he now lies back in Hinsdale County, near Lake City.

Alferd Packer never did hang. It’s quite a detailed story following his first trial, including a jail escape, nine years on-the-lam, and recapture. There was a second trial in 1885 where he was charged for only one murder; after serving only 16 years of his 40-year sentence, he was released and died peacefully one year later at the age of 60. He was buried in Littleton, Colorado where his tombstone properly reads Alfred Packer.

Day 4. Supplemental information about that strange name “Slumgullion.” Is it a stew? Is it a drink? Is it the sludge that puddles below an 1870 sluice box?

Day 5, on our way back to Old Spanish Trail (because we liked it so much). Discovered a new-to-me plant; after a bit of checking with iNaturalist, learned it was Black Henbane, but not before handling all parts of this very poisonous noxious weed!

A short comment on the KG Baking Powder tin lid we found near our trailer. It was old and rusted, but very readable. The tin and its contents were probably long gone. Tried to find any information on the KG brand; sure curious about the age of the lid. If you’ve heard of this brand, please let me know.

KG Baking Powder tin lid we found near Old Spanish Trail.

Day 6. Headed for home. Hope you enjoyed my travel journal.

San Juan Mountains …… up and over Slumgullion Pass. The view of the 700 year old earth flow.

As always, thanks for stopping by!

August “Littles” …. Horned lizards and Sphinx moths, a sleepy wasp under the Super Full Blue Moon, and nature through the eyes of a 15 year old!

August was a busy month, filled with high elevation camping in Colorado, and a lot of cool mountain hiking back home. Even though the lower elevations took on a hot and parched look, at 9,000 feet and higher the wildflower season was far from over as evidenced along roadways and trails, where fresh, colorful blooms could still be found.

The highlight of the month was a 3-1/2 day visit from my brother Bob and grandniece Livi. At 15 years of age, Livi is already a fine artist, and took to nature journaling like a pro! It was great fun discovering and sketching nature on our daily hikes. She even got a chance to hold one of the adult ornate short-horned lizards we see frequently along various trails, and then found a baby lizard on her own, hiding nearly motionless under a small plant. Her smiles were priceless!

Despite the high temps, it was a month of good days and nights, ending perfectly with the rising of a rare Super Full Blue Moon! If you missed it, there’s plenty of time to prepare for the next …… which occurs in March 2037.

Once again, a big shout-out to “Made by Fay” for the inspiring “Littles” idea! These pages are fun to create, and remind me of monthly highlights as I revisit my previous “Littles” posts. Hope you’re enjoying them too, along with the ending days of the season.
Stay tuned for the next installment of “Littles.”

September 14, 2023

The Road to Master Naturalist: Oh No! Noxious Weed Alert …..

Probably best known as Tree of Heaven (ToH), Ailanthus altissima seems to be more widespread in the Albuquerque area and up in the East Mountains than I thought. And it’s officially on the noxious weed list for New Mexico.

How did this happen?

The Road to Master Naturalist: A Field Trip … Tijeras Creek Remediation Project

Yay! After waiting out Covid for 2 years, Bernalillo County (Albuquerque) is once again holding classes for Master Naturalist certification! Both Roy and I applied and were accepted into the program along with 20 other students of all ages and backgrounds.

Many of the classes are being held via Zoom meetings. But thanks to scheduled field trips we are getting to know each other while learning some cool stuff, including a visit to The Tijeras Creek Remediation Project, in our home town. We never realized!

Escapito #1 Focus Study: The Ballad of Goatheads Galore

I remember all too well our brief stay at Percha Dam State Park, and the little drama our dog, Luna, experienced while we were searching high and low for the elusive rufous-backed robin. Our birding naturally took us down sandy trails beneath the cottonwood gallery lining the Rio Grande River. Disappointed we never did see the robin, we were relieved when we got Luna back to BagoBago. Whew ……. I vowed to cement the memory in my mind by composing a ballad of her experience! Read on for the full story.