Class Sphagnopsida

Question 1

Includes which genus?

Answer 1

a single genus Sphagnum (peat or bog moss).

Question 2

Mature plant lacks what?

Answer 2

Rhizoids

Question 3

Colour?

Answer 3

Pale green

Question 4

Alternation of what?

Answer 4

alternation of small, chloroplast-containing cells with larger, non-living, water-storage cells.

Question 5

Stem is composed of what?

Answer 5

Central region surrounded by water storage cells.

Question 6

Describe the Antheridia.

Answer 6

Long-stalked & globose; borne in the axils of the leaves of cone-like branches.

Question 7

Archegonia are big or small?

Answer 7

MASSIVE

Question 8

List 7 features of Sphagnum Sporocyte.

Answer 8

1) Lacks peristome
2) Has dome-like area of sporogenous tissue.
3 Seta does not elongate at all.
4) Pseudopodium elevate the sporophyte at maturity.
5) After elevation of capsule, operculum discharged by expansion of gases in sunshine.
6) Spores setting on acidic moist soil develop protonemma
7) Protonema is SPATUALTE & bears single leafy shoot.