Question

Stem modification of (& function)

1. Allium fistulosum

2. Callisia fragrans

3. Nerium oleander

4. Origanum vulgare

5. Philodendron imbe

4. Tradescantia spathacea

Answer 1

1.Allium fistulosum, commonly called bunching onion, long green onion. does not develop bulbs, and possesses hollow leaves .Elongated underground bulbs are barely thicker than the plant stem.

2. Callisia fragrans-This rarely available sub-tropical is a delightful plant, forming hanging, upright rosettes of deep purple and green leaves on long pendant stems.

3.Nerium oleander-Oleander grows to 2–6 m (6.6–19.7 ft) tall, with erect stems that splay outward as they mature; first-year stems have a glaucous bloom.

4.Origanum vulgare- Stem unbranched–upper part branching, ascending–erect, woody, 4-edged, usually reddish brown, hairy.

5. Philodendron imbe-Philodendron imbe is a vigorous, evergreen, climbing shrub growing up to 5 metres tall with long, aerial rooting stems trailing down to the ground.

6.Tradescantia spathacea- It is a rather succulent herb with a dense cluster of sturdy 6-12 in long sword-shaped leaves arising from a trunklike stem up to 8 in tall.