Sometimes called Velvet Groundsel, this plant has been living and marketed under several different names. The first name in the heading is the one Jimi Blake ascribed to it, a name I didn’t recognize for a plant I’ve grown off and on in the past…it got lost in his list paired with a particular Thalictrum and I simply missed it…until recently. I knew it as Senecio cristobalensis and, had I recognized it, would have included it with an earlier post in which I focused on his favorite Asteraceae. I did actually mention the plant there simply as another Senecio that I’ve grown of value. Here I shall treat it more directly. The genus, Roldana, was recircumscribed in 2008 to include some 54 different species. Other authors include as few as 48 and as many as 64 in the genus, most of which used to belong to Senecio and are native to the extreme Southwestern US, Mexico and Central America. Most of the Roldana species are somewhat ‘shrubby’ herbs with a few, like this one woody, even tree like. Both genera are within the Asteraceae and share tribe status as well, Senecioneae. For the curious, Roldana spp., even more finely, are included in the sub-tribe, Tussilagininae, which includes the very commonly grown genus of garden plants…Ligularia! On closer examination the morphological similarities will begin to stand out to most of us. Check out all of the photos on the Wikimedia Commons page for Roldana petasitis. Roldana petasitis is the correct species name for this plant. With all of the shuffling and consequent confusion still going on in the world of taxonomy, especially in such a mixed large genera like Senecio, we must all be allowed our mistakes of nomenclature. It is a volatile changing world out there. Continue reading
And how did your Red Banana, Ensete, do? Mine didn’t make it having left it planted outside until after Christmas. In my part of SE, December was mild, until the 26th or so, with lows just below freezing a few times. Then we were out of town a few days and it dropped into the mid- and upper 20’s. I had thought it was okay for awhile, as it pushed out a leaf while sequestered in the basement where I had belatedly moved it, but that is all that it was able to do. It’s meristem, at the base of the plant, was damaged. I did the finger test at the top of what I had left in place of the pseudostem, about 4′ of it, and the core, through which new growth should have been pushing was mushy and smelled of rot. I cut it down with my machete in a series of cuts, illustrated here, and you can see the soft brown center surrounded by what appears to be healthy tissue. It was still able to push out a few white new roots over its winter storage. Apparently, the meristem is less cold hardy than the rest of the plant. If you could smell it you’d smell strong rot!!! After 12 + years I have found this plant’s limit! The last pic shows its dismembered carcass, reminiscent of the Tibetan Sky burial ritual, to dry away its stink before I dump it in the bin!
A few days later….This was the business end of my Ensete, Red Abyssinian Banana. You can clearly see that the starch storing rhizome, modified stem tissue, 12″ in diameter, is crisp, white and healthy! I’ve split it down the center, top to bottom, through the meristem. The meristem, the site of cell division and the initiation of all top growth, is black, dead and rotting. Each leaf begins here. As new leaves form at the center, the older leaves ‘migrate’ outward forming the tightly packed ‘pseudo-stem’. This plant, my plant, was unable to initiate any new leaves and with last year’s leaf blades removed, was dead on its ’feet’. The rot would have continued to spread from the center out. New root growth is also compromised. It shares this growth pattern with other monocots much like bulbs. In others, like the woody Palms, the maturing layers of tissue around their meristems, provides some buffering from cold as they caliper up. Obviously Ensete are very limited in their ability to do this!
See my other posts on growing this plant.
Planting out your ‘winterized’ banana
My initial winter assessment
A more in depth look at the growth of Monoctos as a group
[Please note that I wrote this in 2004 as an article in the HPSO Bulletin. A recent FB posting has prompted me to revive/revise and repost it here.]
My first significant relationship with a bamboo,15 years ago, (this was the summer of ’89 when we moved into our current home) was a fatal one. Phyllostachys aurea, Golden Bamboo. I had heard all of the usual stories, yards lost, asphalt heaved and cracked, good neighbors gone bad. Our new house confronted me with several problems, that I knew would get worse if I put them off. It was another example of a homeowner picking the wrong plant for a screen, or failing to take the precautions to contain it. With my limited knowledge and biases I had no doubt about what I needed to do. I got my shovel and chased every rhizome down. I was thorough and a good hunter, none survived. Continue reading
Choosing the right plant is not an easy process. We pick a design theme, make sure our plant choices are a good match for our site conditions, are compatible with their ‘bedmates’ and won’t become overly burdensome, in terms of the maintenance we are able and willing to perform. There are a lot of variables here. Our expectations of how a plant performs in the landscape, as individuals and as a composition, are important as we assess their performance over time and decide how we will respond to them. Many of us are attempting to create gardens that require less of us in terms of maintenance, that fit the conditions on the ground with minimal intervention on our part. We may chose to create a xeric garden to minimize or even eliminate supplemental irrigation. If we do, the plant choices we make, their spacing, the size of plants we purchase, even the timing of the planting and the soil prep we do, are all important in our success or failure. While we attempt to keep our specific site conditions and our goals in mind, we need to be prepared for the extremes of conditions, like weather, that can occur occasionally, even if only once every several years. Continue reading
Many of us who garden in the Pacific Northwest, and especially those of us in Portland this year, will be visiting our garden centers and favorite nurseries this spring and summer with a little more anxiety and need as we look for plants to replace those that have succumbed to this winter’s cold, ice and snow loads, all of which were more severe than what we have come to expect here. But before we pull on our boots and don our rain gear to head off for shopping there are several questions that we need to consider before we make our purchases. Not all of us draw up plant lists, but most of us at least carry in our heads a wish list of plants we have seen in other gardens, in magazine spreads and while on vacations, but if we want to avoid some major mistakes and move our gardens toward the kind of landscapes that we really want, we are going to have to put on our reality goggles and critically assess our choices…that is, if we want to avoid unnecessary losses in the future. Continue reading
About a year ago I posted a series of three articles on Tri-Met’s landscapes along the new Orange Line. They were a critical assessment of their design with many photos and explanations for my criticisms. I had a brief correspondence with the project manager after the first two before he stopped responding. I had asked about the maintenance schedule that they had with the contractor who would be doing the work. I did not receive it. Part of the reason was mine, as new ideas came up for me, my interest wavered and I moved on. Still, I’ve never received anything. Now, a year later, I decided to reassess the first portion of the landscape that I wrote about, as it is a section I regularly walk and ride by bike to downtown or to just get out. I would encourage readers to see my previously posted reviews. Continue reading
(I’ve made earlier postings on this topic, but this piece actually predates those. I wrote this in 2013 while still working as a horticulturist for the City of Portland Parks and Recreation as a member of a Bureau committee that was working to define ‘sustainable landscapes’ so that we could begin to make our policies and practices more consistent with our ‘desire’ to create sustainable landscapes and protect the relatively intact ones that remain. This was a difficult process. We spent a lot of time discussing/arguing about what constitutes a sustainable landscape and ultimately the direction that Parks should be headed.
There was a large divide between those of us who saw ultimately, that the only truly sustainable landscape was one that recreated those native landscapes that preceded the massive changes that European Americans brought with them, so that our efforts should be on these, and those of us who, having spent much of our professional lives in the field doing maintenance in created/urban landscapes, arguing that these new landscapes played a necessary role in the modern world and that our designs and maintenance of them could be moved in a more ‘sustainable’ direction. These urban/functional landscapes, whether for active sports, community gardens or even many passive uses, provide places and venues for activities that native landscapes cannot.
The organizational structure of the Bureau has been built around three primary landscape ‘types’: ‘natural landscapes’ which tend to be larger and border more densely populated sectors of the City, ‘contrived landscapes’ that are dispersed throughout the City and serve the more traditional Park functions for sports and more casual social use and the ‘enterprise landscapes’ of Golf and PIR that serve very narrow functions and depend on those uses for much of the revenue that supports them. These are operated and maintained by discrete groups within the Bureau, have different cultures and priorities and view sustainability very differently. Because these are all in a highly urbanized area the degree of historical disturbance and the continuous pressures that a concentrated population apply to them, they can never by truly ‘sustainable’ in that they will always require our active stewardship to counterbalance these pressures. This is not to say that we give up on the idea of balanced/dynamic landscapes of appropriately chosen plant communities. We just need to remember that these are urban areas and be good stewards of the land. We can even move ‘high use’ landscapes in a more sustainable direction, both in their design and in their maintenance. It is incumbent upon us to do this to ultimately minimize the pressures put upon them and natural areas by weeds, invasives and human use.) Continue reading