Question:

Which of the following species has characteristic of tree without leaf for longest period of about 6 months.?

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In silvicultural texts, Hymenodictyon excelsum is highlighted specifically for its prolonged leafless state, which makes it highly drought-resistant during dry winter and summer months.
  • Hymenodictyon excelsum
  • Tectona grandis
  • Dalbergia sissoo
  • Diospyros melanoxylon
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The Correct Option is A

Solution and Explanation



Step 1: Understanding the Concept:

Deciduous tree species lose their leaves during dry seasons as an evolutionary adaptation to conserve water by reducing transpiration. The duration of this leafless period varies significantly among species.

Step 2: Detailed Explanation:

- Hymenodictyon excelsum (syn. Hymenodictyon orixense, commonly known as Bhurkur or Kuthan) is a deciduous tree of the dry and moist mixed deciduous forests of India.
It is well-known for being leafless for an exceptionally long period, typically spanning up to six months (usually from November/December to May/June).
- Tectona grandis (Teak) is leafless for about 3-4 months during the dry season.
- Dalbergia sissoo is leafless for only a brief period during peak winter.
- Diospyros melanoxylon (Tendu) also has a shorter leafless window.

Step 3: Final Answer:

The tree species characterized by being leafless for the longest period of about 6 months is Hymenodictyon excelsum.
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