 |
| Figure 1. Conocephalum concur found on a rock next to a river |
 |
| Figure 2. Chloroplast close up |
 |
| Figure 3. Air pores
Name: Conocephalum conicum
Common name: Snakewort
Family: Conocephaleaceae
Collection date: September 17, 2015
Habitat: Growing on a moist rock next to the river
Location: Chagrin Falls, Ohio
Description: "Thalli pale to dark green, up to 20cm long and 1-2cm wide. Dichotomously mostly branching, upper surface with distinct polygonal areas, pores distinct, on moist rocks and soil. Widespread in North America."
Key used: Conard, H.S. (1956). How to Know the Mosses and Liverworts. WM C. Brown Company.
Keying steps:
1b) Plants thalloid or, if with stems and leaves, the larger leaves in two rows on the stem and a third row of leaves often present on the underside of the stem, never on upper side. Rhizoids unicellular, sporophyte short lived.
4b) Plants thalloid or leafy, with more than one chloroplast per cell
5a) Plant strongly flattened, thalloid, without distinction between stem and leaf.
6a) Plants with opaque thallus that is divided into an epidermis, loose tissue beneath the epidermis contacting air spaces, and lower solid, parenchyma-like tissue, rhizoids of two kinds, one with smooth wall and one with peg-like thickenings on inner wall...Order: Marchantiales
Pg. 283 Marchantiales
1a) Air pores visible without lens, each in a polygonal area; capsules borne on the underside of an umbrella-shaped receptacle, with spirally banned elaters among spores, walls of capsules with ring-shaped thickenings
8b) Thalli without gamma and without marginal scales on underside
10a) Air pore on a low mound of colorless cells, antheridia in a warty spot on thallus
Links:
|
No comments:
Post a Comment