Q.46 Plant which grows attached to another plant species but is not a parasitic is known as
(A) Endophyte (B) Halophyte (C) Epiphyte (D) Lithophyte

Correct Answer: (C) Epiphyte

Epiphytes grow attached to other plants solely for physical support without drawing nutrients or water from the host, distinguishing them from parasitic plants. This matches the question precisely, as confirmed across botanical definitions.

Option Analysis

Endophyte (A): Endophytes live inside plant tissues, such as fungi or bacteria within leaves or roots, often providing benefits without causing harm. They do not grow attached externally on another plant’s surface.​

Halophyte (B): Halophytes thrive in high-salt environments like coastal marshes or saline soils, adapted to tolerate excess sodium. Attachment to other plants plays no role in their definition.​

Epiphyte (C): Epiphytes, or “air plants,” perch on trees or rocks for elevation and sunlight access, absorbing moisture and nutrients from air, rain, or debris. They harm neither host nor soil dependency.

Lithophyte (D): Lithophytes grow on rocks or stone surfaces, deriving support from inorganic substrates in rocky habitats. They attach to rocks, not other plants.​

Epiphytes represent a fascinating non-parasitic lifestyle where a plant grows attached to another plant species but is not parasitic, thriving in tropical canopies worldwide. Known as “air plants,” epiphytes like orchids and bromeliads use hosts merely for physical support while sourcing nutrients from rain, dust, and debris.

Key Characteristics

Epiphytes exhibit specialized adaptations for aerial life:

• No roots penetrate the host; aerial roots absorb atmospheric moisture.

• Thick leaves or water-storing tissues prevent desiccation.

• Prevalent in humid tropics for optimal sunlight and humidity access.

Common examples include Spanish moss and staghorn ferns, which neither harm hosts nor rely on soil.​

Types of Epiphytes

• Holo-epiphytes: Complete lifecycle aloft, e.g., orchids.

• Hemi-epiphytes: Start epiphytic, later root to ground, e.g., strangler figs.

• Proto-epiphytes: Partially host-dependent, e.g., Peperomia.

Importance in Ecosystems

Epiphytes boost biodiversity by creating microhabitats for insects and microbes, aiding pollination and nutrient cycling in forests. They serve as bioindicators of air quality due to pollutant sensitivity.