Plant Diversity
(Mostly extant diversity, for undergraduate course BIO 341)




"Algae": Construction and Reproduction
Morphology

Phaeophyta: Phaeophyta, Fucus 1, 2

Rhodophyta: Chondrus

Chlorophyta: Oedogonium 1, 2, Acetabularia








Growth Form

Unicellular: Chlamydomonas

Coenocytic, Siphoneous: Codium

Colonial: Volvox 1, 2, Pandorina

Mutlicellular:
Filament, unbranched

Filament, branched (Cladophora)

Parenchymatous: Ulva: sheet
Reproduction

Sporangium: Cladophora

Anisogamy: Eudorina


Charales: cytoskeleton

Charophytes
Chara



Spirogyra





Land Plants

Trilete mark on spore





Pharagmoplast

Phragmoplast







"Bryophyta"

Habitat: Forest floor

Marchantia:  thallus cross section, air pore, pore cross section
Marchantia Archegoniophore, Archegonium
Leaf Liverwort: Bazzania

Hornwort


Pyrenoid
Polytrichum
Gametophyte, antheridial head,


 gametophyte with sporophytedeveloping sporophyte


protonema,
Rhizoids in moss

Stoma of Diphyscium satoi  

Capsule in Mnium

Peristome in moss

Peristome teeth in Hookeria acutifolia
Reproduction
Antheridium and archegonium

Sporophyte





 Plant Diversity: Lycophyta


Isoetes



Lycopodium

Dichotomous branching
Root

Stem c.s.

Strobilus

Sporangia

Gametophyte and germinating sporophyte


Selaginella

Root


Archegonia

Endosporic gametophyte and germinating sporophyte

Strobilus


Plant Diversity: Pterophyta

Psilotum

Habit

Stem: cross section, longitudinal section

Sporogenesis

Ferns: Morphology

Osmunda , Ophioglossum, Adiantum,

Rhizome: Onoclea

Sori: Adiantum,

Root: Longitudinal section, cross section

Stem: Pteridium cross section, Tree fern cross section,





Plant Diversity: Sphenophyta
Equisetum: E. hymenale

Stem: stele, scanning electron micrograph of stem segment

Strobilus: morphology, longitudinal sectio, spore dispersal

Gametophyte: archegonia, sperm,


Fossils

Calamites: one reconstruction, and another






Plant Diversity: "Gymnosperms"
Cycadophyta

Cycas: habit, circinnate vernation,  
Microstrobilus, Megastrobilus 1, 2, megasporophyll with ovule,

Zamia: habit 1, 2, Stem cross section,
Microstrobilus , cross section, microsporangia,
Megastrobilus 1, longitudinal section
ovule longitudinal section: sketch, pollination chamber
Seed: ripe, longitudinal section (gametophyte, embryo)
Pinophyta

Shoot apical meristem,

Stem (young): cross section 1, 2 (sketch),
longitudinal section,

Wood: cross section, block

Microstrobilus: morphology, longitudinal section,

Microspores: pollen grain, germination in vitro, in ovulo,

Megasporophyll


ovule


Female gametophyte


Seed:seeds and cone, gametophyte, embryo;
Seedlings

Gnetophyta:

Gnetum
Ovulate plant, Seed
Welwitschia: habit, Apical meristem
Ephedra: habit, microsporangia,

Ginkgo

Habit
Leaf , Leaf
Microstrobilus, microspores,
Ovule
,
Seed 1, 2






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R. Geeta                                                                                                                                                                 This page last updated on August 23, 2003