EVERY, let me say that again, every, single individual organism, plant, animal, fungi and bacteria…is directly linked, in an unbroken line, to previous organisms. An organism is not created singularly and anew within a Frankensteinian lab, whether of our own hand or nature’s. Life is an extremely rare occurrence. Genesis did not happen, in the biblical sense, but on extremely rare occasions, arguably only once in Earth’s several billion years. The conditions it requires are unique, precise and stable. Just as individuals are linked directly to their parents, entire species are to their predecessors. So called ‘spontaneous generation’ does not happen. The idea that organic matter can be manipulated and ‘sparked’ into life is naive. It can only be more or less manipulaed as we’ve demonstrated time and again in a heavy handed way. Science, especially over the last one hundred years, has made great strides in understanding just what life is, what it requires and how it most likely evolved, but it still cannot ‘create’ it. Even in its most simple forms, such as bacteria, life requires the ability to conduct thousands of biochemical processes within each cell in a very precise way, something that not even a series of highly coordinated human operated laboratories, using standard of the art equipment, can do in anywhere near the amounts and efficiencies that a single living cell can. We are far too clumsy. Doing this for a complex multicellular organism with highly specialized cells, tissues and organs would seem impossible. As we continue to study organisms, their processes and growth, we are learning just how complex and astounding they are. Continue reading
It’s October in Portland and my Agave montana is in the process of flowering…I know, we’re heading toward winter, with its rain and average low down into the mid-30’s with potentially sudden damaging temperature swings from mid-November into March dropping below freezing to the low twenties, with extremes some years, generally limited to the upper teens, though historically, some areas have dropped into the single digits, those Arctic blasts from the interior….Winter temps here can be extremely unsupportive of Agave’s from ‘low desert’ and tropical regions. Combined with these cool/cold temperatures are our seasonal reduction in daylight hours and its intensity (day length and angle of incidence varies much more widely here at 45º north) and the rain, ranging from 2.5″ to 6″+ each month here Nov.- Mar., resulting in a ‘trifecta’ of negative factors which can compromise an Agave, even when in its long rosette producing stage. Any Agave here requires thoughtful siting with special consideration for drainage, exposure and aspect. For an Agave, conditions common to the maritime Pacific Northwest are generally marginal, yet I am far from alone in my attempts to grow them here. Previously, in April of 2016 I had an Agave x ‘Sharkskin’ flower, a process that spanned the summer months, taking 7 until mid-October to produce ripe seed. I was initially a little pessimistic this time about A. montana’s prospects. Why, I wonder, if plants are driven to reproduce themselves would this one be starting the process now? Continue reading
interest, their leaf color, substance and sculptural qualities, the margins of its broad, thick leaves, with their rhythmic rounded ripples, each tipped with a prominent ‘teat’ and spine. This is not a large plant, typically growing 23″- 47″ in diameter and my plan was always to keep it in a pot as it is from coastal areas of the Mexican state of Sonora, found sporadically in a narrow ‘band’ south into Sinaloa. Agave colorata is very rare and uncommon in nature and growing on steep slopes of the volcanic mountains in the coastal region in Sinaloan thornscrub. It often emerges from apparently solid rock cliffs sometimes clinging high above the water below.
Growing in Sonora and at Home
It is poorly adapted to our wet winter conditions though it is reputedly hardy into USDA zn 8, or as low as 10ºF. Its natural northern limit is thought not due to cold, but by excessive aridity in the northern parts of Sonora. I didn’t test it, leaving it outside under the porch roof, bringing it in when forecasts called for below 20ºF, as any plant is more susceptible to cold with its root zone subject to freezing. With perfect drainage and overhead protection, you might be able to get away with this in the ground, but the combination of significant wet with our cold is likely too much…still if someone wanted to try….At best I suspect this one would still suffer from fungal leaf diseases, disfiguring the foliage.
This is usually solitary, but it can be found occasionally in small clumps/colonies up to nearly 10′ across, pushing up against each other on their slowly growing and short ‘trunks’ to 4′ high. My plant produced just a few pups over the first third of its life.
Sonora has three distinct geographic areas all running along a ‘line’ from the northwest toward the southeast, the Gulf of California and its associated coastal landscape paralleling the Sierra Madre Occidental, sandwiching plains and rolling hills in the middle. The coast and plains/rolling hills are arid to semi-arid, desert and grasslands, while only the higher elevation of the easterly mountains receive enough rain to support more diverse and woody plant communities, scrub and Pine-Oak forests.
This region also varies north to south, the climate drying as you go north into the Sonoran Desert. Moving south on down into Sinaloa, and further, is the some what wetter ‘dry deciduous forest’ biome with an array of woody leugumes, including several Acacia. Agave colorata resides in the transition zone in between, in the portion of ‘thornscrub’ near the Sonoran/Sinaloan border. North and south the Thornscrub itself changes in composition. The Sinaloan Thornscrub serves as a transition zone between the desert and the slightly wetter, taller growing, Tropical Deciduous Forest that continues the south. All along this band running north on into Arizona’s Sonoran Desert are various columnar cactus a food source for Mexico’s migrating nectarivorous bat species. It is a unique flora community, containing species from bordering floral regions and other species unique or endemic to this transition zone itself. The area continues to be under threat, primarily by cattle ranching that moved into the region in the ’70’s and ’90’s bringing with it clearing and the introduction of non-native and invasive Bufflegrass, Pennisetum ciliare, also known under its syn. Cenchrus ciliaris, for pasture. Bufflegrass is also a serious problem north into Arizona. In Sonora many of the cleared woody species have since begun moving back in, while the smaller, more sensitive species have not. Climate change promises to further squeeze it. (The World Wildlife Fund maintains a website with good descriptions of many eco-regions I sometimes find it very helpful when trying to understand the conditions of a plant I’m less familiar with.)
When growing plants like this, one should keep in mind the concept of heat zones. The American Horticultural Society has created a map of the US delineating its ‘heat zones’. It is based on the average number of days an area experiences temperatures over 86ºF. At that temperature most plants begin to shut down their metabolic processes…they slow their growth. Check out the AHS map (AHS US Heat Zones pdf.) and keep in mind that we are warming up! The AHS map has us, Portland, OR, in zone 4, meaning we experience 14-30 days with highs over 86ºF each year. Last summer, ’18, we actually had a record 31 days over 90ºF! Now consider that the coastal/plains region of Sonora likely experiences between 180-210 such days! Agave colorata may not need this, but it is certainly adapted to such a level of heat stress. Something to think about, especially when you consider that we receive the bulk of our rain over the winter when our daily highs and lows average for Nov. 40º-53º, Dec. 35º-46º, Jan. 36º-47º, Feb. 36º-51º and Mar. 40º-57º…keeping in mind that we could freeze on most any of those dates. The Sonoran Desert receives its minimal rainfall in a summer/monsoonal pattern….This is why bringing such ‘low desert’ plants to the Pacific Northwest can add another degree or two of difficulty to your success!
Growing this in a pot made perfect sense to me, but every decision carries consequences, not all of which I anticipated. Most Agave don’t form a ‘trunk’ growing its leaves, in a tight spiral, crowded along a very abbreviated stem, which adds little to its length to separate each consecutive leaf., but Agave colorata adds a little ‘extra’ slightly separating its leaves, resulting in a weak and kind of puny stem. If you’ve ever shuffled pots containing Agave more than a few years old, you understand that their crown, their substantial top growth, is relatively heavy, A. colorata is no exception, in fact their leaves each seem more substantial than leaves on many other similarly sized Agave. This results in a plant that as it grows begins to lean over, eventually, laying flat across the ground. As a Monocot the stems of Agave don’t caliper up over the years as does wood. These have no cambial meristem which would add secondary growth, and diameter, to the stem and as I said, with its relatively massive and heavy crown, it leans. This is the same characteristic that gives their small colonies their height.
Warning!!! This is a rant! It’s political, economic, ecological and, most definitely, covers all of the connections between with climate change, these things and our future as a species. I hope you choose to read it, but be forewarned!!
I woke up yesterday at 4:30am, unable to go back to sleep, so I got up and began writing this. The state of the world, the absolute idiocy, meanness and short sightedness of politics today, the undeniable enormity of climate change and its inevitable impacts for every organism on the planet, drives me from paralyzing frustration, to near rage, to profound sadness and despair. Most days all I can do is seek escape and I do this through gardening, reading eclectically, trying to follow some kind of routine, going for walks, a swim or a hike, sharing time with friends or delving into research on plants and the everyday miracles within them and their wondrously choreographed lives here on this planet….I spent my entire morning writing and rewriting this (and returned to it the following day, now today). It is me ‘sharing’. Yes, it’s a rant, it’s a bit of analysis, it’s a window into the world as I see it and it contains a hope I have…that I have to cling to most days, for this world and all that lives upon it, because what we have done, what we continue to do, is so profoundly destructive and disheartening to me. Continue reading
[I wrote this originally about 2 years ago as part of what turned out to be a too long look into the Bromeliad Family. Here I present only the genus Puya spp. in an edited form with the addition of the species Puya berteroniana. Go to the original article to read about the shared evolution of the several genera and families that comprise the family, why these are not considered succulents and a look at the armed defenses of many plants. My plan is to breakout at least some of the other genera as well as I think the length of the original post may have put some readers off.]
Puya: one of the Xeric Genera of Terrestrial Bromeliaceae
The name “Puya” comes from the Mapuche Indian word meaning “point” (The Mapuche people are indigenous to Chile and Argentina. They constitute approximately 10% (more than 1.000.000 people) of the Chilean population. Half of them live in the south of Chile from the river Bío Bío to Chiloé Island. The other half is found in and around the capital, Santiago and were mostly forced to the city after Pinochet privatized their lands giving them to the wealthy.)…the assignation is clear and the pointed, spiky, nature of this genus is immediately obvious to anyone. But there is something easy and comfortable about the sound of the word in your mouth when you speak it…poo-‘yah. Puya are native to the arid portions of the Andes and South American western coastal mountains. (Oddly, two species are found in dry areas of Costa Rica.)
Puya spp., populate arid western regions of the Andes Mountains up into southern Central America. These are terrestrial plants, relying on their roots to find the moisture that they need. They possess the same basic rosette structure common to all members of the Bromeliad family to which they belong, including their petiole-less leaves, which clasp directly to a compact stem structure, funnelling the infrequent, and seasonal, precipitation they get into their crowns and root structures where they can take it up, a strategy very similar to Agave and Aloe which grow under similar conditions. Continue reading
Mid-April and the Ginkgos are flowering….well, technically not ‘flowering’, because they aren’t angiosperms. Botanically speaking, they are doing what they do instead, forming the little structures that contain their sex organs for what would most likely be failed attempts at reproduction. Think about it, in a community filled with males no progeny will be produced. We were on one of our walks down an inner section of Tri-Met’s Orange Line, approaching the Tilikum Bridge, when I noticed this event…I was a little surprised.
If you know much about Ginkgos you probably know about their fruit, which again is not technically a ‘fruit’ because they aren’t angiosperms and only angiosperms form ‘fruit’, but their ‘fruit like’ structures are notoriously stinky when they become ripe, smelling like what many describe as being similar to dog ‘poo’, others liken it more to ‘vomit’, either equally unpleasant, when they fall to the ground and splatter or are stepped on…one of the reasons why these trees are cloned, grafted, by the nursery industry….By cloning selected forms propagators allow us to remove the chance of purchasing a female tree…unless in their zeal to bring a particular form to market they select a tree that hasn’t flowered yet….Without looking at their chromosomes, it is nearly impossible to determine the sex of a juvenile tree. Clones stay true to their sex, so if their scion wood, or buds, are taken from a male tree, the result will be a male clone. Ginkgos are a dioecious species, ‘di’ meaning two, so any one individual plant produces only male or female structures, so it takes two trees, of opposite sex, to produce viable seed. Monoecious means that an individual plant produces male and female structures. In Ginkgo spp. and the non-flowering gymnosperms these sexual structures are called stobili or singularly, a strobilus. Continue reading
Why go visit the Carrizo Plain National Monument?…it is the last, significant, mostly intact, natural grass land in the state of California and puts on a floral performance that can be a showstopper when weather patterns produce sufficient rain over winter and early spring. This area was largely overlooked as the much larger Sacramento, San Joaquin and Salinas Valleys, also natural grasslands, attracted the interest of agriculture and settlers. The intensity and scale of agriculture in those valleys is mind-boggling, almost numbing. Today the big three support only small remnants of their former native biotic communities…much like the Willamette Valley here in Oregon…but Carrizo is different, largely because of its geology and elevation, two factors which strongly effected both the soils and weather, making it less attractive to agriculture and isolating it from markets. Continue reading