Angraecum sororium Schltr. (1925)

 

Geographical origin: 

 

It grows terrestrially among boulders and granitic outcrops in full sunlight at quite high altitudes (1500 - 2000m), in central Madagascar as Mt Ibity, Marojety massif, Itremo massif...
In its homeland it is frequently subject to frosts and brief early morning freezes during the three winter months.
Heavy dews are common during the nine other months.

  

Culture :
 
This species can be grows in a variety of terrestrial and semi-terrestrial media.
I use a mix of granite/decomposed quartzite, barks, leafmold and clay balls.
The medium must ensure a good drainage.
In order for it to flower well, A.sororium must have as much sunlingt as possible, combined with plenty of air movement to prevent leaves from being burned.

 

Growing it outdoor during the summer and fall months and exposure to light autumn frosts enhances flowering.

In situ, Ankazomivady, Madagascar

Links:

TROPICOS
The Plant List
MNHN
IOSPE
KEW