Friday, November 18, 2011

Dioon spinulosum

Here is a Cycad you won't find unless you go looking for it, Dioon spinulosum.  As you can see this has a similar structure to the common Cycas Revoluta (Sago Palm) and so it is easy to see the relationship although they are quite distant as far as Cycads go.  This species won't be found at big box home improvement stores, you will most definitely have to seek it out.


Notice how the leaves are flat across and do not angle up like Cyca Revoluta.  They are also much broader, a lighter green. and have a glossy tint to them.

Notice the very small spines that line the edge of each leaf. These are not really noticed when handling the plant.



The base near the stems is much more open to the outside world than a Sago and does not have sharp spines.  The caudex is also much smoother and delicate.  This caudex is about 4-5 inches, I'm guessing the plant is about 5 years in age.

You can also see that another Cycad of the same variety has grown right next to the primary caudex.  I have not investigated the growth to determine its source yet but Dioon spinulosum is not known for creating suckers.  However it is possible although unlikely for Dioon spinulosum to create suckers on the primary caudex.  (this one is quite far away)

The wind has tweaked some of the leaflets as you can see.  The Dioon spinulosum also, like mostly any plant, does not like to touch the gate as is apparent in this photo.  Notice the sunburn on some of the leaves.  This is due to the plant having grown up in shade and being replanted in sun.  Eventually the plant will fully acclimate although this specimen could actually use more shade.  There is Phoenix canariensis that stands between this Cycad and the sun.  Once the palm acclimates the Phoenix canariensis will grow very quickly and create large amounts of shade during the mid day sun.  Dioon spinulosum will thrive in a partially shaded environment.

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