1

Rhynia major (stem, x.s.)

17

Calamites sp.

2

Rhynia major (sporangium)

18

Calamites sp.

3

Rhynia gwynne-vaughani (stem, x.s.)

19

Asterophyllites (Calamites leaves)

4

Horneophyton lignieri (sporangium, l.s.)

20

Calamostachys linneyana (cone, x.s.)

5

Baragwanthia

21

Calamostachys linneyana (cone, l.s.)

6

Asteroxylon mackei (stem, x.s.)

22

Stigmaria (axis, x.s.)

7

Lepidodrendron sp. (small stem, x.s.)

23

Heterangium americanum (stem, x.s.)

8

Lepidodrendron sp. (stele, cortex, x.s.)

24

Heterangium americanum (secondary xylem & phloem, x.s.)

9

Lepidodrendron f. selaginoides (leaf base w/ligule)

25

Heterangium americanum (phloem parenchyma, l.s.)

10

Lepidodrendropsis (leaf cushion)

26

Heterangium americanum (phloem parenchyma, x.s.)

11

Lepidodrendron sp. (early periderm)+B38

27

Heterangium americanum (sieve plates)

12

Lepidodrendron sp.

28

Spermatites sp. (seed-like megaspore, 100 X)

13

Sphenophyllum plurifoliatum

29

Thomasonia sp. (Lycopod megaspore)

14

Sphenophyllum sp.

30

Minerisporites mirabilis (f. Selaginella)

15

Calamites (shoot apex)

31

Molaspora lobata (megaspore, polar view)

16

Calamites sp.

32

Molospora lobata (megaspore, lateral view)