Monilophytes: Ferns - Psilotopsida

Question 1

Three types of ferns

Answer 1

1. Psilotopsida
2. Marattiopsida
3. Polypodiopsida

Question 2

Psilotopsida

Answer 2

Most bassally diverging of the monilophyte classes

Question 3

Two orders of Psilotopsida

Answer 3

1. Orphioglossales

2. Psilotales

Question 4

Psilotales

Answer 4

Homosporous

simplified sporophyte structure

Question 5

Two genera of Psilotales

Answer 5

1. Psilotum

2. Tmesipteris

Question 6

Psilotum

Answer 6

1. Dichotomizing axes
2. No roots, enantions
3. Some forms with terminals synangia
4. synangia
5. prostele or siphonostele
6. gametophytes bisexual, look like rizhomes

Question 7

Early polysporangiophytes

Answer 7

1. dichotomizing axes
2. No roots, no leaves
3. Terminal sporangia
4. sporangia
5. prostostele
6. gametophytes unisexual, upright gametangiophores

Question 8

Ophioglossales

Answer 8

1. four genera, two north temperate
2. generally terrestrial, several epiphytes
3. one leaf, fertile and sterile segments