HORNWORTS ~ 6 Genera, ~ 350 Species (Anthocerotae) Megaceros

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Presentation transcript:

HORNWORTS ~ 6 Genera, ~ 350 Species (Anthocerotae) Megaceros Anthoceros ~ 6 Genera, ~ 350 Species

Notothylas Dendroceros Phaeoceros

Life Stages

Gametophyte: Chloroplasts

Gametophyte: Thallus Anatomy

Gametophye: Anchoring and Water Uptake

Mucilage Cavities and Ventral Pores Gametophye: Mucilage Cavities and Ventral Pores Fig. 19-3 in Schofield 1985

Gametophyte : Symbionts I

Gametophyte: Symbionts II

Gametophyte: Male Gametangia

Gametophyte: Male Gametangia Fig. 19-5 in Schofield 2001

Gametophyte: Female Gametangia

Female Gametangia

Sporophyte: Early Development Fig. 19-6 in Schofield 1985

Sporophyte

Sporophyte: Growth

Sporophyte

Sporophyte: Stoma

Sporophyte Development Fig. 19-7 in Schofield 1985

Sporophyte: Sporangium

Sporophyte: Sporangium Dehiscence 6

Moss Liverwort Hornwort

Hypothesis I: Bryophytes Monophyletic (Moss) (Hornwort) (Liverwort) All Other Plants Hypothesis I: Bryophytes Monophyletic Green Algae

(Moss) (Hornwort) (Liverwort) Rest of Plants Hypothesis II: Bryophytes Paraphyletic (Some Internal Monophyly) Green Algae

(Hornwort) (Moss) (Liverwort) Rest of Plants Hypothesis III: Bryophytes Paraphyletic (No Internal Monophyly) Green Algae

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