Arabicum and Adenium are both subspecies of the adenium plant, commonly known as the desert rose. While they share similarities, there are distinct differences between the two.
1. Appearance:
– Leaves: The leaves of arabicum are shiny on both the upper and lower sides, adding to its aesthetic appeal. On the other hand, Adenium obesum typically has leaves that are not as shiny.
– Growth habit: Arabicum has a more compact growth habit compared to Adenium obesum. This means that it tends to be bushier and more densely packed with foliage.
– Caudex: The caudex, which is the swollen base of the plant, is larger in arabicum compared to Adenium obesum. This gives arabicum a more robust and substantial appearance.
2. Flowering:
– Flower size: Arabicum generally produces larger flowers compared to Adenium obesum. The flowers of arabicum can reach impressive sizes and have vibrant colors.
– Flowering frequency: While both subspecies can produce flowers throughout the year, arabicum tends to have more frequent and prolonged flowering periods.
3. Hardiness:
– Heat tolerance: Both arabicum and Adenium obesum are desert plants and have a high tolerance for heat. However, arabicum is known to be more heat-resistant, making it suitable for regions with extremely hot climates.
– Cold tolerance: Adenium obesum, including its various cultivars, generally has better cold tolerance compared to arabicum. Adenium obesum can withstand temperatures as low as 40°F (4°C), while arabicum may suffer damage at temperatures below 50°F (10°C).
4. Availability:
– Arabicum: This subspecies is less commonly found in nurseries and garden centers compared to Adenium obesum. It may be more challenging to find arabicum plants or seeds for purchase.
– Adenium obesum: Adenium obesum is more widely available and has a larger variety of cultivars. These cultivars often have different flower colors and patterns, allowing for more options in landscaping and gardening projects.
In my personal experience, I have found that arabicum plants can be more desirable for those seeking a unique and striking appearance. The shiny leaves, larger caudex, and impressive flowers make arabicum a captivating addition to any garden or landscape. However, it is essential to consider the specific climate and temperature requirements of each subspecies before making a choice.
The arabicum subspecies of adenium differs from Adenium obesum in its shiny leaves, more compact growth habit, larger caudex, larger flowers, and heat tolerance. Adenium obesum, on the other hand, has better cold tolerance and is more readily available in nurseries. Both subspecies have their own unique qualities and can be appreciated in different gardening or landscaping contexts.
