lichens of the lower ozark region of missouri and arkansas

9. Podetia stouter and larger, usually >10 mm tall, corticate or ecorticate, but not isidioid squamulose, K-,
K+ yellowish, or K+ red (thamnolic acid absent).
10. Apothecia and pycnidia red; didymic acid present ...................... C. cri statella
10. Apothecia and pycnidia brown; didymic acid absent.
11. Podetia bearing squamules.
12. P odetia UV- (squamatic acid absent), P + red (fumarprotocetraric acid present)
....................................................... C. furcata
12. Podetia UV+ white (squamatic acid present), P- or P + y ello w ( fumarprotoc etraric ac id
absent).
13. P odetia P+ yellow (baeomycic and/or barbatic acid present) ...[C. atlantica]
13. Podetia P- (squamatic acid only) ....................... C. squamosa
11. Podetia mostly lacking squamules.
14. P odetia and squamules K+ yellow turning red (norstictic acid present) ..........
.................................................. C. polycarpoides
14. Podetia and squamules K- or K+ yellow (norstictic acid absent).
15. P odetia and squamules with a distinct yellowish green color (usnic acid present)
.............................................. C. piedmontensis
15. Podetia and squamules green to gray green (usnic acid absent).
16. Podetia and squamules P+ ye llow (atran orin p resent, f um arprotoc etraric ac id
absent) .......................................... C. cariosa
16. Podetia and squamules P+ red (atranorin ab sent, f um arprotoc etraric ac id
present).
17. Pod etia stout, w ith thick walls and a sm all c en tral c av ity; apo thec ia
present.
18. Apothecia flesh colored to tan; squamules 2 mm long ..
.....................................C. sobolescens
17. Podetia slender, with thin walls and a large central ca vity; often s terile
........................................... C. simulata
Cladonia apodocarpa Robbins [CDAPO] - fruticose
Common on well-drained, acidic, often rocky soil, in both full sun and light shade. The characteristic
habitat for this species is well-drained, rocky sites on ridges and upper slopes in woodlands. This
species and C. robbinsii have the largest squamules of the local Cladonia flora. [atranorin,
fumarprotocetraric acid]
[Cladonia atlantica A. Evans] [CDATL] - fruticose
This is a species of massive, shaded, well drained, usually vertical or steeply sloping siliceous rock
outcrops in mesic areas. It occurs just north and east of the region, and is likely to be found within the
Lower Ozarks. It is morphologically similar to some local populations of C. squamosa, which has
a similar ecology. [baeomycic & squamatic acids, ± barbatic acid]
Cladonia cae spiticia (Pers.) Flörke [CDCAE] - fruticose
Uncommon or overlooked, growing on shaded rocky soil, rocks, and rotting logs in woodlands, often
in somewhat mesic sites. The apothecia are sessile or subsessile on the squamules.
[fumarprotocetraric acid]
Cladonia cariosa (Ach.) Spreng. [CDCAR] - fruticose