Moss #2

Figure 1: Moss from top view

Figure 2: Lance shaped leaf with no midrib

 Figure 3: Sporophyte capsule
Name: Platygyrium repens
Common name: Oil spill moss
Family: Hypnaceae
Collection Date: September 8, 2016
Habitat: Fallen damp tree bark
Location:James H. Barrow Field Station

Description: Short branches are upright rom stems and densely covered in leaves. leaves are dark green. Capsules are cylindrical in shape. Leaves are lance in shape and very small.

Key Used:
McKnight, K. B. (2013). Common Mosses of the Northeast and Appalachians (Princeton Field Guides). Princeton University Press.
 
Keying Steps:
Introduction key....16-17
Pleurocarp and Lace lacking a midrib....pp.362-364
1a- terrestrial plants....5
5b- Tree trunk and rotten logs...8
8b- Plants small (stem leaves <2mm)....9
9b- Stem and branch leaves are similar in shape
10a- Plants are oily and brown at center of disk...Platygyrium repens

Other Sources:

http://plants.usda.gov/core/profile?symbol=PLRE5

 

Moss #1

 Figure 1: Lance leaf with no midrib

Figure 2: Branches and dense leaves
Name: Sematophyllum marylandicum
Common name: Curled scrap moss
Family: Sematophyllaceae
Collection date: September 8, 2016
Habitat: Rock near stream/ very damp
Location: James H. Barrow Field Station

Description: Small, found in a mat over wet rocks near a stream. Shoots are irregular and packed densely with leaves. The leaves are lance and the midrib is lacking. No capsules present in this specimen.

Key used:
McKnight, K. B. (2013). Common Mosses of the Northeast and Appalachians (Princeton Field Guides). Princeton University Press.

Keying steps:

Introduction key....16-17
Pleurocarp and lance leaves with no midrib...pp.362-364
1b-Terrestrial plants....5
5a- Plants on wet rocks near stream....6
6b- leaf tips strait
7b- edges of leaves flat and branches strait.... Sematophyllum marylandicum (pg. 219)

Other Sources:
http://plants.usda.gov/core/profile?symbol=SEMA13

 

Algae #1


Name: Netrium
Common name: Green Algae
Family: Mesotaeniaceae
Collection Data: September 1, 2016
Habitat: Pond
Location: Petitti's pond
Description: Unicellular desmid, crescent shaped with two chloroplasts on either side with a white space in between. Looks symmetrical.

Key Used:
http://cfb.unh.edu/phycokey/phycokey.htm

Keying Steps:
 
1- Algae identified as Charophyceae 
2- Desmids (unicellular)
3- Saccoderm Desmid (1 cell wall)
4- Netrium

Notes: Distinguished from Closterium due to more than just two chloroplast separated by an empty space

 

Other Sources:
Guiry, M.D. & Guiry, G.M. 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org

 

Liverwort #2

Figure 2: Pores

Name: Conocephalum conicum
Common name: none
Family: Conocephalaceae
Collection date: September 15, 2016
Habitat: Rotted Log
Location: Nelson Ledges

Description: Leafy liverwort with no gemmae present. Flattened and thalli present.

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-plants thalloid or leafy, more than one chloroplast....5
5a-Flattened....6
6a-Opaque thallus.... Marchantiales (239)

Key to Genera

1a-visible without lens....8
8b- thalli without gemmae....10
10a- air pore on a low mound of colorless cell....Conocephalum (283)

Conocephalum conicum

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