Sample #4: Marchantia polymorpha
Figure 1: Thallose leaf of Marchantia polymorpha, with spore ribbon clearly visible
Figure 2: Gemmae in cup-shaped receptacle rising from pores
Figure 3: Close-up of enlarged pores on thallose surface
Phylum: Bryophyta
Family: Marchantiaceae
Collection Date: 22 September, 2016
Collector: Kristen Maslach
Habitat: can grow worldwide in all temperature zones; found
on damp soil or rocks in moist areas such as banks of streams, bogs, and
greenhouses
Location: muddy rock in the bed of a stream, Squaw Rock, Ohio
Description: Green ribbon-like thallas body; black “midrib”
like line of spores running down the middle of the sections; large gemmae cups not
in specific recepticles on the thallus structure; raised pore in the center of
each polygon division; strong scent
Key Used: Sam Bosanquet et. al. Thallose Liverworts (and hornworts). In Field
Key to Commoner and/or Distinctive Mosses and Liverworts. http://rbg-web2.rbge.org.uk/bbs/Activities/BBS%20Field%20Guide%20Field%20Key.pdf
Steps in Keying Process: pg 22-23
Thallus
liverwort
5.
Thallus body with gemmae in obvoious recepticle
6.
Recepticles open-topped, no gemmae on thallus
tips
7.
Recepticles cup-shaped
Resources:
Great pictures and use of terminology!
ReplyDeleteGreat pictures and use of terminology!
ReplyDelete