Time flies... as do the clouds in the above video. 8 years ago today this blog was started off with a test post featuring a picture of a field of Cylindropuntia bigelovii photographed in Joshua Tree National Park (maybe I should do another C. bigelovii post as I have lots of beautiful pictures from that and later visits to the park ;-)
As a curiosity it can be mentioned that I broke the shutter of my old Nikon D70 doing the above time-lapse video a couple of years ago. The video is rather short (as the shooting ended prematurely) and doesn't show the flower unfold, but I thought it would fit nicely with this post, illustrating the passing of precious time.
If the video doesn't embed properly you can view it in a separate window by clicking the picture below.
Peyote in the sky...
Wednesday, January 02, 2013
Friday, August 17, 2007
I’ve previously made an attempt at a stop-motion video showing the thigmotropic behavior of Lophophora stamens. It so happened that the Lophophora williamsii var. jourdaniana plant flowered again during my summer vacation, leaving me plenty of time to experiment with time-lapse videos.
The first video shows the Lophophora williamsii var. jourdaniana flower unfold (I’m not exactly an early bird so I missed the first part of the unfolding ;-)
The above video covers a time span of approximately 90 minutes, i.e. playback is sped up by a factor of 150. This is my first attempt at a time-lapse “flower movie”, as can be seen by the quality of the film. The first 11 seconds were shot while the camera was in auto-focus mode, resulting in a “wobbly” feel. I then disabled auto-focus (and lost a couple of frames in the process, which can be seen as a “jump” 11 seconds into the video) and later had to re-focus (28 seconds into the video), so it's not perfect, but not bad either. The frames were shot with the sun as the only source of light.
Next, I wanted to make a better (i.e. more frames per second) version of the thigmotropic stamens video but ended up with a version looking a lot like the original one.
The playback of the above video is sped up by a factor of 12. Unfortunately I stopped taking pictures just as the stamens started to revert to their original position. In an attempt to achieve more frames per second I played around with my cameras continuous shooting mode. Suddenly the flower was visited by an industrious bee beautifully illustrating the purpose of the touch sensitive stamens ;-)
I guess the last 2 clips would be more illustrative if they had been filmed with a regular video camera instead of an SLR, but they’ll have to do for now. Unfortunately my camera ran out of power effectively putting an end to the filming of this particular flower.
Finally I have to mention the Hydrocactus – cactus video page as the main inspiration for these experiments and the best source of cactus videos I’m aware of.
Monday, June 11, 2007
One of my Lophophora williamsii v. jourdaniana plants is flowering again – this time with the full cooperation of the sun, resulting in a much more well-developed flower compared to the previous one.
Flowering Lophophora jourdaniana
My two Lophophora williamsii v. jourdaniana plants are almost in full compliance with Habermann’s description (rose-violet perianth, pistil, and filaments; persistent spines on young areoles) but the open flower clearly contradicts Habermann’s claim of cleistogamic flowers (i.e. flowers that do not open and are self pollinated). Apparently Habermann misunderstood or used this term incorrectly as the photo accompanying the type description also shows a plant with an open flower ;-)
Lophophora jourdaniana – thigmotropic stamens
Like many other species of cacti (including the other Lophophora species/varieties) L. jourdaniana has thigmotropic stamens, i.e. stamens that when touched fold in around the style (as is evident for the front stamens in the rightmost picture).
The following stop motion video provides a better illustration of the thigmotropic mechanism - I'll try to make a higher quality movie the next time the plant flowers.
Vlastimil Habermann (1975), “Lophophora jourdaniana Habermann species nova”, Kaktusy 11 (1), 3
Tuesday, May 22, 2007
One of my Lophophora williamsii v. jourdaniana plants flowered last week. I’m hoping the early flower can be seen as a promise for more flowers this season – last year and the year before last the plant only displayed one flower.
Flowering Lophophora jourdaniana
The sun was obscured by clouds most of last week and consequently the flower never unfolded completely before it withered. The picture above shows the flower at its peak – it’s still beautiful in all its rose-violet charm, but for comparison you can check the fully unfolded flower from last year in all its splendor.
Spent Lophophora jourdaniana flower
Monday, July 31, 2006
According to Habermann’s description Lophophora williamsii v. jourdaniana differs from other L. williamsii varieties by having rose-violet perianth, pistil and filaments as well as having small persistent spines on young areoles.
Flowering Lophophora williamsii v. jourdaniana
One of my Lophophora williamsii v. jourdaniana plants flowered today, beautifully illustrating the description (even some spines can be seen faintly in the photos ;-)
Lophophora williamsii v. jourdaniana flower
Like L. williamsii v. williamsii the jourdaniana variety has thigmotropic stamens, i.e. stamens that when touched fold in around pollinating insects or the style. I wonder if this mechanism is used for actively depositing pollen on pollinators or for avoiding self-pollination (or both)?
L. williamsii v. jourdaniana – thigmotropic stamens
The flowering of this plant coincided with the flowering of my grafted Lophophora williamsii (SB 854; Starr Co, Tx). I decided not to outcross the plants but instead self-pollinate both of them; first of all to keep my SB 854’s “clean”, but also because I want to test the alleged self-incompatibility of the jourdaniana variety.
This Lophophora williamsii v. jourdaniana plant also flowered last year – it was then outcrossed with pollen from a regular L. williamsii and yielded 2 seeds.
Wednesday, October 12, 2005
I’m finally getting on top of my jet lag and ready to blog ;-) One of my Lophophora williamsii v. jourdaniana plants flowered while I was in California. Unfortunately my girlfriend is neither a cactus buff nor a skilled close-up photographer (she doesn’t mind me saying so… not too much anyway ;-) so the only reasonably sharp photo of the flower is the one pictured below.
Flowering Lophophora williamsii v. jourdaniana
Only time will tell if the attempted fertilization was a success. Pollen from the grafted Lophophora williamsii (SB 854; Starr Co, Tx) was used.
Flowering Lophophora - before and after
The before and after photos were taken at September 17 and October 7 accordingly.
Check the next post on Lophophora williamsii v. jourdaniana for more detailed photos.
Saturday, April 16, 2005
I just received a batch of plants from Uhlig Kakteen – mostly winter hardy cacti but also a couple of white flowered Lophophora williamsii v. jourdaniana. As usual the Uhlig plants are of an excellent quality and well worth the price (€14.00 ~ $18.00 per loph).
2 x Lophophora williamsii v. jourdaniana 'Weiss'
Gerhard Köhres has a couple of photos of white flowering Lophophora williamsii v. jourdaniana: weiß 1 and weiß 2.
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