Aula 05 Bryophyta Bryopsida

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Divisão Bryophyta
Sistemática
Classe Sphagnopsida
Classe Bryopsida
Classe Andreaeopsida
Classe Bryopsida
Buxbaumia
Sistemática
Classe Sphagnopsida
Classe Bryopsida
Classe Andreaeopsida
Classe Andreaeopsida
Character Bryophyta Marchantiophyta Anthocerotophyta
Protonema Filamentous, forming many buds
Gametophyte form Leafy shoot 
Leafy shoot or thallus; thallus simple 
or with air chambers 
Simple thallus 
Leaf arrangement Leaves in spirals Leaves in three rows Not Applicable 
Leaf form 
Leaves undivided, midvein 
present 
Leaves divided into 2+ lobes, no 
midvein 
Not Applicable
Special organelles None Oil bodies Single plastids with pyrenoids 
Water conducting cells 
Present in both gametophytes 
and sporophytes 
Present only in a few simple thalloid 
forms 
Absent 
Rhizoids Brown, multicellular Hyaline, one-celled Hyaline, one-celled 
Gametangial position Apical clusters 
Apical clusters (leafy forms) or on 
upper surface of thallus 
Sunken in thallus, scattered 
Stomates Present on sporophyte capsule Absent in both generations 
Present in both sporophyte and 
gametophyte 
Seta 
Photosynthetic, emergent from 
gametophyte early in 
development 
Hyaline, elongating just prior to spore 
release 
Absent 
Capsule 
Complex with operculum, theca 
and neck; of fixed size 
Undifferentiated, spherical or elongate; 
of fixed size 
Undifferentiated, horn-shaped; 
growing continuously from a basal 
meristem 
Sterile cells in capsule Columella Spirally thickened elaters Columella and pseudoelaters 
Capsule dehiscence At operculum and peristome teeth Into 4 valves Into 2 valves
Distinguishing Characters of Mosses (Phylum Bryophyta),Liverworts 
(Phylum Marchantiophyta) and Hornworts (Phylum Anthocerotophyta) 
http://bryophytes.plant.siu.edu/bryophytes.html