Saturday, December 18, 2021

Polygonatum multiflorum understory crop

 


 I've found Polygontum multiflorum (Common Solomon's Seal) is exceptionally tolerant of deep shade. Here it is growing with only a little dappled light in the understory of the New Zealand native tree Mahoe, Melicytus ramiflorus (very common in Wellington suburbs where native bush has been allowed to recover). It is possible there is slightly more indirect light available to this plant than in some dense Mahoe groves but you can see in the background nothing else is growing naturally nearby. This plant is also on a very steep slope, almost vertical. 

The young shoots are edible (1) with a pleasant taste. The shoots are available in spring, it is not a very productive crop, you'd need a lot of plants for a good feed. Couplan says the roots are fibrous but edible starch can be extracted from them, requiring cooking to make them safe to eat and have also been used in making bread (2). Another reports says they are eaten raw (3), Moerman (4) and Gibbons (5) say the rhizomes can be cooked and eaten without mention of fibers or toxicity, I've not tried them yet. 

The rhizomes of many other shade loving Polygonatum species are eaten in China with little or no preparation (6). Some are sold in Chinese supermarkets and online, including those of Polygonatum odoratum, which is widely available as an ornamental in the West.

1. https://pfaf.org/user/Plant.aspx?LatinName=Polygonatum+multiflorum

2. Couplan F. The Encyclopedia of Edible Plants of North America. Nature's Green Feast. 1998.

3. Wild edible plant resources of the Lobha Range of Kedarnath Forest Division (KDF), Garwhal Himalaya, India. Radha et al. International Journal of biological sciences V2(11)  2013

4. Moerman D.E. Native American Food Plants. An Ethnobotanical Dictionary. 2010.

5. Gibbons. E. & Tucker G. Euell Gibbons Handbook of Edible Wild Plants. 1979.

6. e.g., Ethnobotanical review of food uses of Polyonatum (Convallariaceae) in China Wujisguleng Wujisguleng, Yujing Liu, Chunlin Long Vol 81, No 4 (2012) > Wujisguleng

Saturday, November 20, 2021

Stachys sylvatica edible weed


 Stachys sylvatica (Hedge Woundwort, Whitespot, Hedge Nettle) is a common weed in Wellington and many other parts of New Zealand (1). 

There are not many references to it being used as food but Couplan (2) states the young leaves of all Stachys are edible raw or cooked, stating Stachys sylvatica has been eaten in Europe, recommending the taste of the raw leaves after being crushed for a few minutes.

I find the leaves unpalatable raw (without crushing) but after boiling for four minutes they loose most of their kick and are pretty good, with only a slight attitude some might not like much but which I enjoy. I have eaten the large mature leaves boiled in quantity hundreds of times. 

I find it is worth allowing this perennial shade loving weed to grow in the food garden as it is quite productive and can be continuously harvested a few leaves at at time without killing the plant. It grows up to 1 meter tall and does not usually cause much trouble to neighboring plants.

Reference

1) An Illustrated Guide to Common Weeds of New Zealand. Ian Popay, Paul Champion, Trevor James. 2004.

2) The Encylopedia of Edible Plants of North America. Nature's Green Feast. Francois Couplan. 1998. 

Thursday, November 18, 2021

Oenanthe javanica, productive, low toil, crop


I've found the plant Oenanthe javanica (Water Dropwort, Vietnamese Celery, Water Celery) to be a highly productive perennial crop in my temperate garden, so far, I've found only Vietnamese Mint (Persicaria odorata) to be more productive and tasty.  Leaves grow back quickly after picking and it spreads quickly. It can be continuously harvested over spring, summer and autumn, much less productive in winter. I grow it in tubs as an aquatic, I have also noticed it escape into moderately moist soil nearby in the garden.

It will grow in full sun but growth is more luxuriant and leaves are noticeably softer and better to eat with some shade, 2-3 hours direct sun a day seems to be optimal.

The stems and leaves have a pleasant taste, somewhat like carrot, also seem somewhat metallic or mineral to me, in a good way. I don't think I have encountered the "white floating rhizome" which has been valued highly as food (1). I have encountered what looks to me more like a modified stem, pale green, running along the surface of the soil under the water spreading out roots as it goes, it has the same taste and texture as the stems.

I rarely if ever have to weed the tubs with this plant in it, it tends to monopolize an area, at least when grown in water (in Wellington, New Zealand). Seems like a perfect "low toil" species, requiring little or no care, ideal for "modern" gardeners, generally less accustomed to physical work than their ancestors.

Suitable for a small space such as an apartment balcony.

Government conservationists have very recently become concerned with the vigor of this plant in native water systems in New Zealand (2). I would argue the benefits of this plant outweigh the costs so hope it is never banned from home gardens. Many perfectly good aquatic food plants are already frustratingly banned in the name of supposedly virtuous native purity. Trying to restore pristine native aquatic ecosystems seems futile to me, the "weeds" have won as far as I can see.

  

1. Edible Water Gardens. Growing water plants for food and profit. Nick Romanowski. 2007

2. https://www.stuff.co.nz/environment/123694247/pest-plants-invade-richmond-waterways-go-ballistic-across-new-zealand  


Monday, November 15, 2021

Astilboides tabularis edible

 


There does not seem to be any mention of Astilboides tabularis being edible on the net, however according to the book "Food Plants of China" by Shiu-ying Hu (2005) the young shoots and leaf stems are edible, used like asparagus. I find it has a unique and pleasant taste, raw or cooked, which I'd describe as rather smoky. The very large mature leaves are soft enough to eat too and have the same flavor, I don't see why they are not eaten too.  

It does not appear to be an especially productive crop but is a good plant for very shady moist locations where few other crops will grow. It is often sold in the West as an ornamental. I find they are extremely fussy about soil moisture content.

Saturday, August 14, 2021

Heat pump: more expensive/false economy

 A heat pump should save you an average of $500 a year if used "properly" (1).

Heat pumps are generally efficient for 10 years (2)

So a heat pump should save you $5000 dollars over 10 years assuming electricity prices do not go up over 10 years.

But a heat pump can cost between $2000 and $6500 to purchase and install. Lets assume you get a reasonably good one for $3500 (3).

Lets assume you get annual cleaning for 10 years at $125 per year minimum, That's $1250 minimum, some quotes are almost twice as high.

In addition a professional checkup is recommended every 2 years costing $175 per checkup, totaling $875 over 10 years.

So the total cost of a heat pump over 10 years:

$3500 + $1250+ $875 = $5625

So, according to these calculations, a "good" heat pump could easily cost you $625 more than regular heating over 10 years assuming prices do not go up over 10 years and assuming nothing goes wrong with it over that period. 


1. Genesis Energy NZ

2. https://www.heatandcool.co.nz/buy-new-heat-pump/

3. https://www.stuff.co.nz/life-style/homed/living/114431369/how-much-does-it-cost-to-install-a-heat-pump


Wednesday, June 2, 2021

Transport-free community?

Update Nov 2023. I just learned the idea below, in milder form, is quite common with town planners around the world, often called the "15 minutes city" meaning 15 minutes walk to most necessary things. Carlos Mereno has been credited with this idea. An excellent introduction:

https://www.rnz.co.nz/programmes/the-detail/story/2018913522/convenient-cities-become-conspiracy-targets




"research argued that to replace the total energy (not just electricity) use of the UK with the best available mix of wind, solar and hydroelectricity would require the entire landmass of the country. To do it for Singapore would require the area of 60 Singapores." (Ref :https://www.stuff.co.nz/environment/climate-news/300319513/idea-of-green-growth-is-flawed-we-must-find-ways-of-using-and-wasting-less-energy


It is worth noting the UK are putting wind farms out at sea, so do not have to use the "entire landmass", but still, it appears there may not be enough room in the world to fit enough renewables to power our current energy usage. So a sustainable society may require not only a transition to (mostly) renewables, we will also apparently need to transition to much more modest, less grandiose and addictive, power consumption.

To be "transport-free" might have to become the new ideal, as opposed to the current "transport is freedom." 

We may have little choice but to drastically reduce (not but eliminate) dependence on transportation of goods and people through maximizing small or "human" scale local self-reliance advocated since the 1970's by the likes of E F Schumacher, Kirkpatrick Sale and many others*, with work, rest, play and even politics close together, ideally within walking distance. The more frequently something is needed the nearer by it should be. This is how most of humanity lived before the environmental crisis, surely we can do it again but better with modern technology and science. 

This is the opposite of the current effort to find alternative "green" technology to do the same job as cars, such as expecting people to ride bicycles which are usually completely inadequate for the distances, loads and schedules created by a society built entirely around the car, not to mention difficult hills and weather. E-scooters are much the same, except for hills, are dangerous and reportedly currently mainly replace walking not driving so actually add to carbon emissions. Electric cars may not be much better, manufacture, use and disposal of electric cars still produces a lot of carbon, between 37 and 83 % as much as petrol cars in one analysis. ** This alone is not enough, especially if poorer populations become rich enough to start buying cars and/or the population increases. EVs are also currently dependent on rare earth which China has a near monopoly on. Public transport is clearly part of the solution, but it also reportedly only reduces emissions by about half, it is also often slower, infrequent, inflexible, overcrowded and not good for out of the way places or transporting goods.

It does seem a bit ridiculous that most people spend most of their transport time basically going around in circles, using finite expensive polluting resources to repeat exactly the same lengthy dangerous commute over and over for most of their lives and they love it.

Love of the car is like a form of the Stockholm syndrome, when people held hostage decide they love their captors because they are totally dependent on them and completely under their power. Where society is designed entirely around cars people are essentially held hostage by them.  

Escaping this would require:

1. Local renewable energy production

2. Near self-sufficiency in organic products like food, maybe clothes, building material and firewood. Bare essentials mostly produced (voluntarily) within households less frequent needs within local communities. Distance to travel for very rare needs like surgery might not change.

3. Recycling everything non-organic that comes into a community, metals and plastics, even many pharmaceuticals may be retrievable from sewerage. 

4. Adaptable factory-workshops that can produce or at least repair almost anything, say computers one week, clothes or solar panels the next. This would be the opposite of industrialism- one factory making the same thing over and over, often suppling the entire world. This would be a factory-workshop that makes a few or even just one of many different things for local needs. I don't know how possible this is, it is just an idea. People might also have to become more well rounded, have multiple professions and/or skills.  

5. It would also probably require frugality and austerity, doing without frivolities. There is evidence our addiction to consumerism is making us unhappy aside from destroying the planet. According to neuroscience indulging in too much pleasure backfires, though this is very difficult to recognize, we will usually escalate consumption to try to regain pleasure. We are happier relying on more modest "simple pleasures"*** like our own creativity and activity, things like community dance for instance used to be almost universal.

Some things would best remain global, like telecommunications, mineral distribution and disaster relief. 

Private cars would not need to be banned, they would just loose their widespread monopoly over satisfying peoples' needs.

The possible resulting rebirth of local social community, which transportation and other technology has largely eradicated, might be a plus for many isolated people, assuming we can re-invent the social skills required. I would say most of us have become too focused on ourselves or our faction to function constructively in a genuine community but that could perhaps change with help from recent social science like mentalization based therapy which can supposedly treat narcissism, I don't know about treating an entire society, just one person sounds hard enough. The narcissism epidemic**** may also just be an understandable way of surviving in the absence of real community. It would also be nice to think anthropological studies of far more socially inclusive societies could be useful. The extreme ethnic and cultural diversification of many areas due to the globalization of labor may pose similar problems requiring similar solutions but could potentially mean much richer sociality. Or this may be too hard or even undesirable, socializing might have to continue to mainly consist of small groups oblivious or antagonistic to each other. 

My suggestions here are abstract, easy to say on paper, it is unclear how far local self-reliance can be taken in practice. It would be interesting to see what eventuated if all the experts and inventors in the world currently working to serve global empires focused on maximizing local self-reliance rather than mass dependence. Increased local political participation would also allow everyone to help shape their community and technology, people often have more nuanced insight into their unique needs and solutions than experts.

It is admittedly unclear if we can consciously and deliberately make such a fundamental change to social structure, we are good at adopting (addictive) new technology but not new social systems. How we "organize" society may be largely unconscious and immune to rational arguments especially arguments that go against the instinct for maximizing power or dominance, even if our survival is at stake.  

Unless renewables become much more efficient it appears we could only continue our high transportation power usage by replacing fossils fuels with nuclear power (powering electric transportation), which has problems, or the exciting but uncertain possible development of other high energy sources such as clean nuclear fusion some time in the future ( https://www.lowimpact.org/why-brian-cox-is-wrong-about-nuclear-fusion/ . ) 

However even if we do find a green way to continue our energy intensive lifestyle a largely transport-free community may be a more meaningful and beautiful place to live.


* e.g., authors like Hazel Henderson, Ivan Illich, Wendell Berry and Murray Bookchin. Human Scale by Kirkpatrick Sale is the best introduction to this kind of thinking I know of. More recently Transition writers too. It seems to me there is not much to add to what these authors said years ago, practical action/research is needed now (and no one reads anything of any length anymore). 

** How clean are Electric Cars?

 crhttps://www.transportenvironment.org/discover/how-clean-are-electric-cars/#:~:text=Tonnes%20of%20CO2%20emitted%20over%20the%20lifetime&text=In%20the%20worst%20case%20scenario,emit%2083%25%20less%20than%20petrol.

*** Dopamine Nation. Finding Balance in the Age of Indulgence. Anna Lembke MD. 2021.

+ more succinct interview with the author:

https://www.rnz.co.nz/national/programmes/sunday/audio/2018812004/how-our-smartphones-are-turning-us-into-dopamine-junkies

(don't be put off by the interviewers focus on smart phones, the interviewees concerns are much broader).   

**** The Narcissism Epidemic. Living in the Age of Entitlement. J Twenge, W. Keith Campbell. 2009.


Friday, April 30, 2021

Riding the Crow


Riding the Crow/Night 
Painting by David Nicholls 2021. 60cm x 50cm.

 

Wednesday, March 24, 2021

Cardiocrinum giganteum bulb, vegetable or edible starch source?

The book 'Food Plants of China' by Shiu-ying Hu reports that peasants extract edible starch from the bulbs of Cardiocrinum giganteum (var yunnanense).

By contrast 'Mansfeld's Encyclopedia of Agricultural and Horticultural Crops' states the starchy bulbs are actually used as vegetables.

I decided to eat some bulbs to see for myself, is it a convenient vegetable or purely a starch source?  

As I suspected the outer layers (scales) of the large bulb I tried were very starchy but too fibrous to eat directly as vegetables, so would only be suitable for starch extraction (I only tried a large fully developed bulb, it is possible the smaller young bulbs are free of fibers). The inner core however, when peeled, is free of fibers and has a pleasant texture, like more widely eaten Lilium bulbs, so is, in my opinion, suitable for use as a vegetable. It is however slightly bitter and you do not get a huge amount to eat compared to the very large space this plant takes up. It looks like it would be considerably more productive as a starch source than as a vegetable, the numerous fibrous outer scales for starch, the comparatively small core as a vegetable. 

The fact that it takes around seven years to reach maturity (then dies sending out offshoots) may also indicate it is not a particularly productive crop, especially if you don't have much space. 

Despite possible drawbacks this plant may still be one of the better understory crops around since it is reportedly tolerant of deep shade and dry soil (Ref: The Genus Cardiocrinum. Philip Bolt   http://www.redhall.org.uk/GardenOpening/cardio_bklet.pdf.) I'm trying it out under native and exotic trees at present.