Platycerium alcicorne cross madagascariense is a
hybrid dating back to Jerry Horn, a nursery man in Florida, one of the
first experts on platyceriums. This cross hybrid was named P.
Horn's Surprise. I have a Horn's Surprise and a Dawboy, both
from Thailand. Both are
pictured above side by side with the P. Horn's Surprise on the left and the
P. Dawboy on the right. There are two varieties of the
P. alcicorne, one from Africa and one from Madagascar. The
African P. alcicorne is a lighter green than the Madagascar
P. alcicorne. When observing the shade of green, it is
apparent the P. Horn's Surprise is a cross with the African
variety whereas the P. Dawboy is a cross with the Macagascar
variety of P. alcicorne.
Charles Alford also has a cross of P. alcicorne and P. madagascariense that's been named P. Larry Weed and it is similar to the P. Dawboy photo above. If they are the same, it needs to be resolved which name should be used, based upon who came first.
One other difference between the two varieties of the P. alcicorne is the shield fronds of the African P. alcicorne may be smoother and the rippling effect of the P. madagascariense may be less pronounced. More examples of the African P. alcicorne need to be studied to confirm this observation.
The photo on the right is from Shaun Pillay in South Africa. This P. Horn's Suprize is the best example of an established P. Horn's Suprize I can find on the Internet. The shield fronds are light green and appear not as deeply grooved. The fertile fronds seem to have a major fork, then one or two smaller forks again near the tip. This forking is similar to the P. andinum. The second photo below left is the shield of the same plant and shows the P. madagascarinese shield frond characteristic
photo on the right is a
My observation of the Horn's Suprise which I have not seen mentioned before is the nature of the fertile fronds to grow outward from the bud and fold over and curve downward while maintaining the initial angle of growth from the bud. I find this true on Don Callard's plant (right), Shaun Pillay's plant (above right) and my personal plant (below).
The fertile fronds have one major fork then smaller forks at the tips.
I have also observed that ants tend to nest in the shield fronds where as other adjacent species are not bothered by the ants.
The reader must realize that many hybrids are a result of accidental mixing of spore when similar plants are grown in close proximity. Even when spore from two species are intentionally crossed, it is always possible for a spore from an unintended species to contaminate the intended cross. A cross of two species is considered a sport, or cultivar until it's progeny duplicate the same traits through spore propagation and pup division. After many years of second and third generation progeny from the original plant can we call it a hybrid This can take a long time with slow growing platyceriums and experienced growers are hesitant to jump the gun and name a hybrid. So when we discuss hybrids, we need to consider all the variables. Soon we will have more definite DNA studies. Until DNA testing is more readily available, and established parent base lines defined, we must look at and compare traits from other species and deduct a logical inference to the actual parentage and these are considered individual plants and not necessarily a hybrid.
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