| 1. |
Plants without distinction of stoloniferous and erect portions,
or if these are distinguishable they are similar in form |
C.
fastigiata
|
| 1. |
Plants
with contrasting stoloniferous and rhizoidal erect portion |
2
|
| 2. |
Erect
blades flat, entire, sparingly proliferous from the stalk or face
of the blade |
C.
prolifera
|
| 2. |
Erect
portion of the plant either filiform or more massive, variously
branched, lobed or cleft |
3
|
| 3. |
Branchlets
or lobes of the erect blades with minutely aculeate tips |
4
|
| 3. |
Branchlets
or lobes with smooth, rounded, or flattened tips |
16
|
| 4. |
Branchlets
normally and regularly forked |
5
|
| 4. |
Branchlets,
lobes, or teeth simple or only occasionally forked |
9
|
| 5. |
Plants
large and bushy, with an obvious branched stalk 1-3 mm diam.,
bearing slender pinnately divided branchlets on the upper portion
only |
C.
paspaloides
|
| 5. |
Plants
more delicate, the stalks of the erect portions not notably differentiated |
6
|
| 6. |
Branchlets
short, the divisions less than 10 diameters long |
7
|
| 6. |
Branchlets
with longer and verticillate divisions |
8
|
| 7. |
Branchlets
constricted sharply at each forking |
C.
murrayi
|
| 7. |
Branchlets
unconstricted |
C.
webbiana
|
| 8. |
Plants
small, t about 2.5 cm tall, the verticils small and crowded, the
stolons notably hairy, the branchlts constricted at the forks,
not mucronate |
C.
pusilla
|
| 8. |
Plants
to 7.0 cm tall, the verticils conspicuous, well separated, the
stolons naked or nearly so, the branchlets not constricted, bimucronate |
|
| 9. |
Branchlets
filiform, in many ranks or randomly distributed |
10
|
| 9. |
Branchlets
or teeth 2-few ranked |
11
|
| 10. |
Stolons
naked |
C.
cupressoides
|
| 10 |
Stolons
tomentose |
C.
lanuginosa
|
| 11. |
Erect
branches bearing flat blades with broad flat marginal pinnae |
C.
mexicana
|
| 11. |
Branchlets
or teeth terete or compressed |
12
|
| 12. |
Branchlets
or teeth usually short and not constricted at the base |
15
|
| 12. |
Branchlets
usually elongate and constricted at the base |
13
|
| 13. |
Branchlets
strongly compressed, tapering to the apex |
|
| 13. |
Branchlets
terete or somewhat compressed, cylindrical or expanded towards
the apex. |
14
|
| 14. |
Branchlets
nearly cylindrical, 03 - 0.5 mm diam |
|
| 14. |
Branchlets
somewhat compressed, gradually expanded from a slender base to
the rounded, apiculate tip, 1.5 - 2.0 mm diam. |
C.
floridana
|
| 15. |
Branches
compressed above, even band-shaped, often notably spirally twisted,
marginally dentate; the teeth generally in a single row on the
outer edge of the spiral |
C.
serrulata
|
| 15. |
Branches
terete or compressed, not notably twisted; teeth generally 2 or
more ranked, short, but in some varieties or more diameters long
and interpretable as branchlets |
C.
cupressoides
|
| 16. |
Branchlets
nearly or quite cylindrical and clearly pinnately 2 ranked |
17
|
| 16. |
Branchlets
spherical, clavate or otherwise distally enlarged, if nearly cylindrical
not regularly pinnate |
18
|
| 17. |
Very
small plant, 1-2 cm tall, the cylindrical branchlets on repeatedly
forked axes, the pinnules occasionally forked, occasionally divided
in coralloid fashion |
C.
vickersiae
|
| 17. |
Quite
large plants, reacing 1 dm or more in height; the brachlets very
slightly clavate near the tips, on undivided axes |
C.
ashmeadii
|
| 18. |
Branchlets
subsessile, the very short stalk with a definite constriction
at the summit |
C.
microphysa
|
| 18. |
Brachlets
with a mre obvious stalk, which is not at all constricted |
19
|
| 19. |
Ends
of the branchlets generally sharply swollen, yet varying from
nearly cylindircal or clavate to subspherial or frontally slightly
compressed |
|
| 19. |
Ends
of the brachlets terminating abruptly in a peltate disk |
|
