- Leaf lobe with a distinct line of ocelli (best seen in a wet mount)
|
F. asagrayana |
- Leaf lobe without a distinct line of ocelli
|
2 |
- Base of underleaf with prominent auricles straddling the stem
|
F. plana |
- Base of underleaf without prominent auricles
|
3 |
- Dry shoots with leaf lobes wrapping downward, in places curling under the stem; leaf lobes
squarrose when wet
|
F. ericoides |
- Dry shoots with leaf lobes plane or curled downward only slightly; wet leaf lobes plane or
squarrose
|
4 |
- Leaf lobules throughout the entire plant consistently large in relation to the dorsal lobe,
occupying 75% or more the area of the dorsal lobe
|
F. oakesiana |
- Leaf lobules consistently small or variable in size on the same plant, usually occupying less
than 75% of the area of the dorsal lobe (some lobules may be large and obscure 75% or more of
the dorsal lobe but other lobules on the same shoot will be smaller in relation to the dorsal
lobe)
|
5 |
- Leaf lobules angled away from the stem; base of lobules separated from the stem by a distance
equal to or greater than the lobule width; lobules always inflated (except those near perianths
or in the androecia)
|
F. caulisequa |
- Leaf lobules parallel to the stem; lobules touching stem or separated by a distance less than
the lobule width; lobules inflated or explanate
|
6 |
- Monoicous
|
7 |
- Dioicous
|
8 |
- Leaf lobules often explanate, when inflated as wide or wider than long; green to brown/blackened
plants
|
F. inflata |
- Leaf lobules always inflated (except those near perianths or in the androecia), longer than
wide; red to blackened plants (infrequently greenish in shade forms)
|
F. kunzei |
- Leaf lobes distant to slightly overlapping; lobules often all explanate, extending at least
halfway across the ventral face of the dorsal lobe; underleaves large, regularly 3-4 times wider
than diameter of the stem, distant and easy to demonstrate; generally lax plants often loosely
adhering to the substrate (almost always rock); mature perianths and male plants unknown
|
F. riparia |
- Leaf lobes imbricate (except in small, poorly developed plants); lobules mostly all inflated, if
lobules explanate rarely extending to halfway across the ventral face of the dorsal lobe;
underleaves small, as wide as stem or up to 3 times the width of the stem, often difficult to
demonstrate; rather firmly attached to rock or bark (or exposed wood; rarely as an epiphyll)
|
9 |
- Oil bodies 4-8 in cells of leaf lobe (avoiding cells in the very base of the lobe and cells in
the leaf margin)
|
F. brittoniae |
- Oil bodies 2-5 in cells of leaf lobe
|
10 |
- Perianth smooth, without turbercles
|
11 |
- Perianth with tubercles (may be limited to the ridges of the perianth, best seen in hydrated
specimens and confirmed with compound microscope)
|
12 |
- Perianth without prominent dorsal ridges and keels; female bracts usually not squarrose when
wet; lobules of mature, well-formed leaves usually small; mouth of lobule not compressed; shoots
with caducous leaves often present, sometimes abundant
|
F. eboracensis |
- Perianth with prominent dorsal ridges and often with deep dorsal pleats demarcating dorsal
keels; female bracts typically squarrose when wet but sometimes not; lobules of mature,
well-formed leaves consistently small, or some small and others large; mouth of lobule rarely
(rare on a single shoot) with mouth strongly compressed; shoots with caducous leaves rarely seen
and never abundant, usually arising as small, determinate side branches on main shoots
|
F. viginica, in part |
- Perianth almost always without prominent dorsal ridges, never strongly keeled dorsally; perianth
always tuberculate across the dorsal and ventral face; perianth beak short; female bracts almost
always nonsquarrose when wet; some lobules with the mouth strongly compressed; large lobules on
mature shoot sectors common; main shoots with caducous leaves usually common
|
F. appalachiana |
- Perianth with prominent dorsal ridges and often with deep dorsal pleats demarcating dorsal
keels; perianth tuberculate across the dorsal and ventral face, or tubercles restricted to
perianth ridges and keels; perianth beak often long, sometimes short; female bracts typically
squarrose when wet but sometimes not; lobules rarely (rare on a single shoot) with mouth
strongly compressed; large lobules on mature shoot sectors less common; shoots with caducous
leaves rarely seen and never abundant, usually arising as small, determinate side branches on
main shoots
|
F. viginica, in part |