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Lab 10 Lycophyta, Psilotophyta. Vascular plants General features of the land plants Common name: Vascular plants Synonyms: Tracheophyta Growth habit:

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Presentation on theme: "Lab 10 Lycophyta, Psilotophyta. Vascular plants General features of the land plants Common name: Vascular plants Synonyms: Tracheophyta Growth habit:"— Presentation transcript:

1 Lab 10 Lycophyta, Psilotophyta

2 Vascular plants General features of the land plants Common name: Vascular plants Synonyms: Tracheophyta Growth habit: Multicellular: stems, leaves, and roots; thalloid gametophytes Undulipodia (“flagella”): Whiplash (2 to 1000+) Conductive cells: Sieve cells, forming phloem (food), and tracheids, forming xylem (water)

3 Vascular plants Clonal reproduction: Vegetative, various multicellular propagules Sexual reproduction: Homosporous or heterosporous Included Phyla: Lycophyta, Psilotophyta, Sphenophyta, Pterophyta, Cycadophyta, Ginkgophyta, Coniferophyta, Gnetophyta, Anthophyta Recognized by: Free-living, branched Sporophytes; xylem

4 Tetrads

5 Lycophyta General features of the vascular plants Common name: Club mosses (applies also to the Class Lycopodiopsida) Synonyms: None Sporophyte growth habit: Stems, leaves, roots Gametophyte growth habit: Photosynthetic or parasitic thalli

6 Lycophyta Stele: Protostele Undulipodia (“flagella”): Two or more whiplash Sexual reproduction: Homosporous or heterosporous Representative genera: Isoetes, Lycopodium, Selaginella Recognized by: Meiosporangia on upper surfaces of sporophylls

7  Lycopodium Lycophyta: Lycopodiopsida

8  Lycopodium stem Lycophyta: Lycopodiopsida

9  Lycopodium strobilus Lycophyta: Lycopodiopsida

10  Selaginella Lycophyta: Selaginellopsida

11  Selaginella “resurrection plant” Lycophyta: Selaginellopsida

12  Selaginella “sporeling” Lycophyta: Selaginellopsida

13  Selaginella strobilus Lycophyta: Selaginellopsida

14  Selaginella strobilus Lycophyta: Selaginellopsida

15  Isoetes Lycophyta: Isoetopsida

16  Isoetes megaspores and microspores Lycophyta: Isoetopsida

17 Psilotophyta General features of the vascular plants Common name: Whisk ferns Synonyms: Psilophyta Sporophyte growth habit: Stems Gametophyte growth habit: parasitic branching thalli

18 Psilotophyta Stele: Protostele Undulipodia (“flagella”): Two or more whiplash Sexual reproduction: Homosporous Representative genera: Psilotum, Tmesipteris Recognized by: No leaves or roots; dichotomous branching; synangia

19  Psilotum Psilotophyta

20  Psilotum rhizomes Psilotophyta

21  Psilotum rhizome Psilotophyta

22  Psilotum meiosporangium Psilotophyta

23 Appearances can be deceiving


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