Another early rising ended with a major morning-tea incident, but I made it in time to join Mark Dimmitt and a small group of 10 on a fieldtrip to Ironwood National Forest, a newly established park, and to Ragged Top. The first spot is called Waterman Mountains, where we first saw the Ironwoods (Olneya tesota, Fabaceae), named so for the extraordinary quality of its super heavy dark-red wood. Toxins in the hardwood make it so no fungus or insect can initiate any decomposition, rendering this wood virtually indestructible. Besides of this remarkable trade they actually consider some of them to be as old as 500 years, due to the adaptation to re-sprout from the base if the top dies or burns.
Trees first leaf out and either keep those leaves for the rest of the season, or loose their leaves and put out a flush of lavender-white flowers. I did not see this, only those promising flower buds, making me wish I could stay a little longer and come back to this location to see this.
The other special treat was a beautiful colony of Turk’s head cactus (Echinocactus horizonthalonius nicholii), of which we saw seedlings, adults and dead ones, but no flower. The plants here are so much more heavily armed then the plants of South Africa. Different animals?
The Ragged Top location was especially scenic, and the Saguaros, Carnegia gigantea here reach their highest density and size in this place. Absolutely amazing! Their root system being super shallow they have to spread as far as they are high, which makes it still impressive when you see them growing all the way up the cliffs on the narrow ledges.
Right after signing in and picking up my batch and program, I immediately hit the plant sale. The motto was: quick and hard. Not sure if that was the right strategy ($87 damage), but I was telling myself I wont go back there for the rest of my stay, yeah – right, I did not know yet about the great book sale…
Cylindropuntia versicolor, Staghorn Cholla
One of my favorite lectures was by a USGS guy named Bob Webb, who was talking about the succulent diversity in the central Baja California peninsular. I want to go there NOW! He specified 3 different groups, the cacti, the succulents and the sarco-caulescent plants. Besides of getting a pretty good overview of the genera and species found in this region, I realized again how interesting the distribution aspect of plants is. And of course the related geology and (micro) climates. The regions on the upper side of the fog line, and more on the western side of elevations, showed the highest species richness index (something he had defined earlier). And all this is found mostly in the parts of the peninsular that have winter or mixed season rainfall, with summer rainfall regions being much poorer in species. Interesting, to say the least, as this correlates with what I have seen in South Africa.
I another talk, by the research meteorologist Michael Douglas, was about high-resolution satellite imaging of cloud cover over a certain time, in oppositions or in conjunction with precipitation records, and the information that is relevant to plant growing conditions and adaptations. Quite fascinating (here is a link), it seems a helpful tool concerning biogeography, a subject hat I seem to have a lot of interest in. Well, it deals with maps, which I absolutely love, so not too big a surprise…
I reconnected with Ernst van Jaarsveld, the curator of Kirstenbosch’s Conservatory, who first taught me about cliffs as specialized habitats. He gave a talk about plant exploration in SA, a subject I obviously can’t get enough of. His second lecture I liked even better, this time a ‘habitat’-talk about cliff dwellers. We later talked about the progress on his project of installing a cliff-garden and the new Welwitschia house. Lithophytes seem to gain more attention recently, maybe due to the ‘horizontal habitats’ being increasingly destroyed by overgrazing, burning and mining, with most diversity of native species only hanging on to those inaccessible cliffs? I would love to be at Kirstenbosch when Ernst installs the new exhibits.
Coming back from my morning hike I made it just in time to hear a fabulous talk about Madagascar by Pietr Pavelka, a Czech plants-man. His great photography really stood out from all the other presentations. He gave another lecture with more from the Richtersveld, South Africa. Even with his strong accent he is a good speaker and his pictures are quite fantastic.
Ferrocactus wislizeni, the Fishook Barrel Cactus
Another worthwhile presentation was the introducing of Australian native succulents by Attila Kapitany, which really showed how little there is known in the greater western succulent world about plants from this continent. He had some beautiful pictures of incredible plants, like Stylidium sp., Dischidia sp., Dorianthes, Peperomia, Hydnophytum, Myrmecodia, and I could go on with this list of stuff if I could remember half of what he showed…
Echinocereus fasciculatus, Hedgehog Cactus flower
Cylindropuntia versicolor, Staghorn Cholla flower
Then a succession of lectures about lithophytic (rock dwelling) Tillandsias, about a million Sanseverias from all over, a few snippets about DNA work in Mammelaria genus and finally a talk about plants of the island of Socotra in Yemen.
Botany sure makes you work on your geography, I had to look up this botanically famous, but to me unknown, weathered clump of old continent on the African Horn.
So here comes my short rant - skip if you rather hear about plants only
· I am profoundly annoyed by those presentations with the wife in every other picture next to the plant – always mentioned, as ‘this is my wife next to the so-and-so plant’. And what about all these phallus reverences whenever and wherever there is something upright? One guy went even as far as having several (yes! – not just one) pictures of animals (elephant, baboon) with erected penises throughout his PPP. What the F&*#$%? There are also way too few woman getting around in this boys-only-club (of all 28 original speakers 26 are men and 2 women). TOTALLY uncool. The end.
Opuntia engelmannii, detail
After listening to even more stuff about Aloes, hybridizing Adeniums, Echeverias in the wild, and Aeoniums on the Canary Islands, my ears hummed, my eyes blurred, and my throat was dry. There was only one thing to do; a cold margarita on the Hotel terrace watching the sunset over the Santa Catalina Mountains
View from the Westin La Paloma Resort,
where the convention was held, is an extremely fancy affair, spread out and beautifully located at the bottom of the Santa Catalina Mountain range north of Tucson, part of the Coronado National Forest.