I am a unique plant, known for my remarkable adaptation to arid conditions. My leaves are reduced to spines, and I'm often mistaken for a member of the Cactaceae family, though I am not related. I produce vibrant flowers that can be quite spectacular when in bloom.

1. My stems are the primary site of photosynthesis.
2. I am native to Madagascar.
3. I secrete a white, toxic sap when damaged.
4. My 'spines' grow in pairs.