Liverwort #1

Name: Marchantia polymorpha
Common Name: Common Liverwort or Umbrella Liverwort
Family: Marchantiaceae
Collection date: September 15, 2016
Habitat: Wet Rock
Location: Nelson Ledges

Description:
Leafy liverwort with very distinct gemmae cups that are round. Air pores visible in sample on collection day.

Key Used:
 
Conard, H.S. and P.L. Redfearn, Jr. 1979. How to Know the Mosses
 
and Liverworts 2nd Edition, McGraw-Hill, Boston, Mass.

Keying Steps:

Introduction Key....19
 
1b- Plants thalloid....4
4b-chloroplast multiple per cell, leafy....5
5a-plants flattened....6
6a-Plants with opaque thallus....order Marchantiales

Key to Genera
1a-air pores visible without lens....8
8a-thalli with open half cups....9
9a-gemmae in cups-round....Marchantia (284)

Marchantia
 
1a-thallus 1cm wide, gemmae cups with surface
 
pupillae...Marchantia polmorpha