Question

b)
What is Cypsella? In which plant family it is
found? Describe diagnostic features of that
family. Mention economic importance of that
family. .
1+1+4+4=10
সিপসেলা কি? কোন্ উদ্ভিদ গােত্রে এটি দেখতে পাওয়া যায় ?
ঐ উদ্ভিদ গােত্রের সনাক্তকরণ বৈশিষ্ট্যগুলি লেখ। উদ্ভিদ
গােত্রটির অর্থনৈতিক গুরুত্ব বর্ণনা কর।​

Answer 1

Answer:

1) Cypsela is a dry single seeded fruit formed from a double ovary of which only one develops into a seed,as in the daisy family.

2)In Asteraceae family it is found.

3)The diagnostic features of that family are given bellow-

Mostly herbs or shrubs or rarely trees, leaves alternate rarely opposite, exstipulate rarely stipulate, inflorescence capitulum or head surrounded by involucre of bracts, ray and disc florets, flower tubular or ligulate , flowers bi-or unisexual or outer male or female?, pentamerous, actinomorphic or zygomorphic, corrola etc., fruit cypsela...that are the diagnostic features of that family.

4)The economic importance of that family are given bellow-

The family Asteraceae contributes several food,dye,oil and medicine yielding plants. Also this family includes large member of ornamental plants "Heliantlus tuberosus", "Cynara scolymus" are used as vegetables.