Lab 11

1
Lab 11

• Sphenophyta, Pterophyta

2
Sphenophyta

• General features of the vascular plants
• Common name Horsetails
• Synonyms Arthrophyta
• Sporophyte growth habit Stems, leaves, roots
• Gametophyte growth habit Photosynthetic thalli

3
Sphenophyta

• Stele Siphonostele
• Undulipodia (flagella) Several whiplash
• Sexual reproduction Homosporous
• Representative genera Equisetum
• Recognized by Scale leaves in whorls hollow
  stems meiosporangia on sporangiophores

4
P Equisetum
Sphenophyta
5
A Equisetum aerial stem
Sphenophyta
6
D Equisetum rhizome
Sphenophyta
7
A Equisetum gametophyte
Sphenophyta
8
D Equisetum gametophyte with embryonic
sporophyte
Sphenophyta
9
D Equisetum strobilus
Sphenophyta
10
D Equisetum strobilus
Sphenophyta
11
A Equisetum strobilus
Sphenophyta
12
A Equisetum meiospores
Sphenophyta
13
Pterophyta

• General features of the vascular plants
• Common name Ferns
• Synonyms Pteridophyta, Filicophyta
• Sporophyte growth habit Stems, leaves, roots
• Gametophyte growth habit Photosynthetic thalli
• Stele Siphonostele or protostele

14
Pterophyta

• Undulipodia (flagella) Several whiplash
• Sexual reproduction Homosporous or heterosporous
• Representative genera Azolla, Cyrtomium,
  Marsilea, Osmunda, Polypodium, Salvinia
• Recognized by Meiosporangium with annulus (not
  in all) meiosporangia often in clusters (sori)
  on undersides of leaves

15
P Assorted ferns
Pterophyta
16
P Sori
Pterophyta
17
P Sori
Pterophyta
18
P Sori
Pterophyta
19
P Sori
Pterophyta
20
P Sori
Pterophyta
21
P Sori
Pterophyta
22
A Osmunda rhizome
Pterophyta
23
A Osmunda rhizome
Pterophyta
24
A Marattia meiosporangia
Pterophyta
25
A Fern sporangia
Pterophyta
26
A Cyrtomium sori
Pterophyta
27
P Fern gametophyte
Pterophyta
28
P Fern gametophyte
Pterophyta
29
A Fern gametophyte fertilization
Pterophyta
30
A Fern gametophyte with sporophyte
Pterophyta
31
D Fern gametophyte with sporophyte
Pterophyta
32
P Marsilea
Pterophyta
33
D Marsilea x.s. sporocarp
Pterophyta
34
D Germinating Marsilea sporocarps
Pterophyta
35
D Germinating Marsilea sporocarps
Pterophyta
36
D Marsilea male, female gametophytes
Pterophyta
37
P Azolla
Pterophyta
38
P Salvinia
Pterophyta