First Time Bloomers (Part 2)

       This is the second group of "First Time Bloomers" to be posted.  As I said earlier, I will post new Angraecoid plants as they bloom for the first time.  On occasions, I may show a comparison of a mature plant to that of a plant in flower for the first time.

Angraecum Memoria George Kennedy is a hybrid that was registered with the RHS in 1981; the originator was D. Nail.  The seed parent is Angcm. eburneum ssp. giryamae while the pollen parent is Angcm. eburneum ssp. comorense.  Each sub-species is a variation of Angcm. eburneum.  One of the traits that stands out is that of the nectary (spur); it resembles that of the pollen parent; close to a half inch longer than the traditional Angcm. eburneum.  Another trait that is dominant in the hybrid is the nonresupinate uppermost lip; about a half inch to three quarters of an inch larger than the seed parent.  This is one of four plants that is grown in 100% red lava rock (medium to coarse sized pcs. allowing for fast drainage and plently of room for the root system to develop).  It receives a range of bright diffused sun light that measures 2500 FC to 4000 FC year round.  The amount of water the plant is given varies depending upon the time of year.  Summer watering is every other day and what ever rain it receives late spring through early fall.  Once temperatures come down into the upper 70s, water is reduced to every three to four days.  Angcm. Memoria George Kennedy doesn't appear to have a dormant period so I fertilize every week throughout the year.  I have observed an extremely fast development in the root system where the roots will begin to grow outside of the pot or basket; be sure to prevent those roots from attaching to anything around the plant.

 Angraecum leonis, this individual plant is the Madagascar variety; the other variety is from the Comoros Islands and can be more than double the size (see the post dated February 25, 2013, Angraecum leonis [Size Identifies]).  Angcm. leonis, no matter the variety usually will show you when there is a lack of water reaching the plant.  When the plant is young, its root system hasn't really reached any length.  Leaves that show a sign of wrinkling is a warning that the plant is under stress for lack of water.  It is imperative that you watch younger plants for this sign.  A strong indication of a healthy root system is the thickness of the leaves; moisture is stored in those leaves where carbohydrates are produced to nourish the plant.  The Madagascar variety usually has leaves that are 2 to 3 times thicker. A trait common due to the lack of rain in the region.  The Comoros variety receives a large amount of rain and will be more than twice the size as mentioned.  As either variety of the plants matures, it will start to produce an aerial root system (in a natural habitat, the root system secures the plant to the branches and limbs and provides more moisture and nutrients).

  Aerangis mystacidii X Aerangis decaryana; registered in November, 2012 by Sarah Waddoups (congrats Sarah), the originator was Klinge Orchids.  The above images were the first blooms from October 2013.  The plant is mounted to a 4 x 6 inch (10x15cm) cork slab.  It receives 1,800 - 2,500 FC of medium light daily.  It is watered every morning in South Florida's 10 month warm season and very often misted late afternoon if temperatures are in the upper 80s or higher.  Watering is cut back to every other day throughout most of December and January.  The plant receives fertilizer every week through the warm season and every two weeks during the two cooler months in Winter. 

 

Angraecum eburneum ssp. giryamae

                During the early part of my presentation regarding the Angraecum Alliance, I stress the fact that many of the alliance do not do well in the blooming department if the roots are bothered or disturbed too much.  In other words, they become somewhat dormant when it comes to blooming for as long as and up to five years.  You will see this mentioned in various posts throughout the blog.  This particular post is going to address that probability in depth dealing with an Angraecum eburneum along with the culture demands of this species.

                Angraecum eburneum ssp. giryamae or Angraecum giryamae (the specific species in this post) as it is now classified as well as two other sub-species of Angcm. giryamae hail from various locations such as Madagascar, the Mascarene Islands, the Comoro Islands and East Africa; their origination depending upon the species.  They are all considered sub-tropical to tropical growers and grow in fairly moist areas as epiphytes and occasionally as lithophytes and semi-terrestrial plants.  Exception to this is Angcm. eburneum spp.  xerophilum grows in the semi-arid to arid areas of Southern Madagascar where there is a 3 – 5 month dry or dormant period during the winter months in the Southern Hemisphere (this species is discussed indirectly as one of the parents in the post “Birth of a Shooting Star”).

                                  Image 01                                      Image 02

 

Several days after giving the Angraecum presentation to one of the South Florida Orchid Societies, I received an email along with a photograph attached showing an un-named Angraecum that had grown so much that it had pushed itself out of the pot.  The plant appeared to be Angcm. giryamae and was in excellent health.  No sign of stress or any severe batches of fungus.  It had very strong leaves of green with numerous secondary plants and a few kiekies (Images #01 $ #02).

The root system was visible (and there were many), most were 3/16 – 5/16 inches (.4 - .6cm) wide.  There was also a substantial number of new roots with green tips almost 3/4 inches (2cm) long.  It is this root system that shouldn’t be disturbed.  I always explain that when potting or placing certain species of Angraecums in baskets; you should use a container that will not need to be changed later.  Let the plant grow into it!  Angraecum giryamae can reach a height of 4 – 6 feet (1.2 – 1.8m); although a plant in culture will very seldom reach a height of over 4 feet (1.2m).

            The instructions given to the plant owner were followed exactly as given.  She had a 12 inch (30cm) square by 6 inch (15cm) deep cedar basket prepared for the transfer of the plant.   The medium was a mixture of charcoal, perlite, tree fern pieces and coconut chunks that were considered to be medium size.  She very carefully used a small hammer and broke the pot up around the plant’s base root system.  She did not pull any of the broken pot pieces off of the roots.  Whatever fell off at the time of breaking the pot is what was thrown away.  Any of the old medium that was still stuck to the root system was left alone.

Image 03

 

The plant was then placed into the cedar basket and the new medium was placed into the basket around the plant.  Then very carefully working the new medium into the voids in and around the plant.  Once the plant was settled into the basket, it was watered and a systemic fungicide was used to treat the plant.  It was placed in the same area receiving the same amount of light and care has it had previously (Image #03).

             During the summer months, the plant was watered about every three days, fertilized once a week and a systemic fungicide is used about every four weeks.  Patience now has the upper hand; will the plant lie dormant or will it bloom?

Images 04

             Late this summer, the plant starting putting out an inflorescence; a very good indication that it would bloom.  Watching it develop and finally seeing the first buds appear gave even a higher degree of hope that the re-potting of the large Angraecum was a success.  As you can see in the following image, the Angraecum giryamae successfully bloomed (Image #04).

             Not every transfer or re-potting of a mature Angraecum will be this successful.  Root systems are used by this genera as any other.  Supply the plant with moisture and stability.  But, the root systems are much more sensitive.  If the roots are disturbed too much, they will become dormant for an unusual amount of time; not blooming and slower growing for several years.  That is why I stress to hobbyists to find out how large the plant will get and then placing that plant into a pot or basket to accommodate the plant as a mature adult.  Keep in mind that the medium must be thoroughly thought about also.  Do not use a mixture of materials that will decompose.  It will cause problems with mold, mildew and funguses that may kill the plant faster than you can treat it.
           
            [The plant in this post belongs to Patt Lindsey; a hobbyist here in South Florida.  She supplied all of the photographs as well as doing the repotting.  Congrats to you Patt.  A job well done!]