Post lab lecture about Vascular Cryptogams Dept of Biology, UP Manila

1. Vascular Cryptogams Post lab discussion http://www.botany.hawaii.edu/faculty/Webb/BOT201/BOT201/201-98Theme.htm#Plantae:%20Pterophyta

2. Vascular cryptogams Vascular plants that do not produce seeds Spores only Vascular tissues: tracheids and sieve cells

5. Stele Description of Vascular Tissues which develop from Procambium Everything inside the Endodermis

6. Protostele Proto means first.

7. Siphonostele has a pith in the center

8. Dictyostele divided AmphiphloicSiphonostele Concentric vascular bundles with an Endodermissurrounding the bundle

9. Eustele similar to the dictyostelebut the bundles lack an endodermis and are collateral or bicollateral

10. Atactostele collateral bundles distributed in more that one ring within the Stem no Endodermis

11. Vascular cryptogams Division Psilotophyta Division Lycophyta – Selaginella and Lycopodium Division Pterophyta– ferns Division Sphenophyta– horsetails or Equisetum

12. Lycophyta erect stems as well as Stolons and Rhizomes can be epiphytic have Microphylls (leaves) and Roots Branching is Dichotomous for both organs

14. Lycopodium

16. LycopodiumStem x.s.

17. Selaginella

18. SelaginellaStem x.s.

21. Division Pterophyta Rhizomatous, stolon Roots are adventitious Megaphyll predominate organizational pattern for fern leaves is Pinnate.

23. Megaphyll produced complex stelar organization in some ferns Leafy stems have dissected steles while Rhizomes (produce few or no leaves) have relatively undissected steles.

24. with leaf gap starting to form No leaf gap

25. Pteris root xs cortex endodermis xylem phloem

26. Fern rhizome xs

28. Division Sphenophyta Aerial Stems & Rhizomes Grooved, Jointed Microphyll, Whorled Arrangement

29. Leaves are fused and form a sheath around the stem at each node. The number of tips signifies the number of leaves.

30. Equisetumxs Hollow canals- Cells Destroyed by Elongation Central canal

32. Cutenized

33. Rough Surface = Silicon

34. (Nick name = Scouring Rush) Epidermis

35. Sclerenchyma (Ridges) Cortical (Vallecular) Canals CollenchymaChlorenchyma Cortex

36. Vascular bundles Opposite the ridges Stele: eustele

37. Vascular (carinal) canal caused by the destruction of Protoxylem during Elongation May serve for conduction but not efficient

38. Vascular bundle Endarch Tracheids, in some vessels Sieve elements metaxylem protoxylem