TYPE 2: Pinus Occurrence , Structure & Reproduction
abidaTYPE 2: PINUS cones Occurrence The genus Pinus has about 90 species. It has world wide in distribution. They are mostly present in the temperate regions. Four species of pinus…
TYPE I: Cycas – Occurrence , Structure and Reproduction
TYPE I: CYCAS Occurrence Cycas has a limited distribution. It is found in south East Asia and Australia. Cycas is also cultivated as an ornamental plant in the gardens and…
DEFINITIONS AND KEY POINTS FOR OBJECTIVES OF PTERIDOPHYTA
DEFINITIONS AND KEY POINTS FOR OBJECTIVES OF PTERIDOPHYTA
Gymnosperms life cycle , Cones , Fertilization , Affinities & Classification
GYMNOSPERM Occurrence Gymnosperms are naked seeded plants. Gynmosperms are a group of ancient plants. They become dominant in the Jurassic period Most of the gymnosperms are evergreen trees. Some shrubby…
Seed Habit its history ,evolution & Lineages
SEED HABIT A seed consists of an embryo, stored food and a seed coat. The seed habit is the most complex and evolutionary successful method of sexual reproduction. It is…
Pteropsida (FERNS) – TYPE III Polypodium – Occurrence & Structure
PTEROPSIDA (FERNS) TYPE III POLYPODIUM Occurrence Polypodium is a perennial herb. It is found mostly in temperate regions. It has worldwide distribution. Mostly is attached to some rocks. But some…
PTEROPSIDA (FERNS)
PTEROPSIDA (FERNS) TYPE II MARSILEA (Water fern) Occurrence Marsilea is an aquatic or semi aquatic plant. It is common in the temperate regions. It groNA in fresh water ponds and…
Structure of Leaf
sidraSTRUCTURE OF LEAF Different groups of plants hake different variations in the internal structure or foliage leaves. Hie leaves show different evolutionary adaptations for different environmental conditions. The leaf tissues…
SECONDARY GROWTH IN STEM
SECONDARY GROWTH IN STEM The stem increases in thickness In secondary growth. Secondary growth increases the vascular tissues. Therefore, it increases the thickness of flue stein. Secondary growth is common…
Ipteropsida (FERNS) – TYPE I Adiantum
IPTEROPSIDA (FERNS) TYPE I ADIANTUM (Maiden Hair Fern) Occurrence Adiantum is a common fern. It is found in the plains of the Punjab. It grows in shady places. It is…