94 
e E oo w 
c 
17. 
18. 
. Lycopodium clavatum. 
- Lycopodium annotinum. Lon 
MR. C. E. JONES ON THE MORPHOLOGY 
EXPLANATION OF THE PLATES. 
PLATE 3. 
. Lycopodium clavatum. Transverse section of the stem : €, immermost region of cortex; 
c, median zone of cortex; ¢;, outer zone of cortex ; L,leaf-base. x 20. 
Lycopodium clavatum. Diagrammatic drawing of the vascular cylinder of the stem: s.t., sieve- 
tubes; pp., protophloem ; pæ., protoxylem ; per., pericycle ; e., endodermal cells; c., cortex ; 
lt., leaf-trace. x 100. 
. Lycopodium alpinum. Photograph of transverse section of stem. x 20. 
y squarrosum. Photograph of transverse section of the stem, showing phloem-islands : 
px., protoxylem ; s., sieve-tubes; p.i., phloem-island ; r., root. x 50. ; 
Lycopodium Dalhousieanum. Photograph of transverse section of the stem: p.i., phloem-island ; 
pæ., protoxylem. x 50. 
- Lycopodium cernuum. Photograph of transverse section of stem: P., peripheral phloem-area ; 
p.i, phloem-island; pæ., protoxylem. x 50. 
Lycopodium inundatum. Apex of stem. x 300. 
PLATE 4. 
Diagram showing general arrangement of xylem and phloem in 
transverse section of the stem, xylem shaded. x 30. 
Lycopodium clavatum, Diagram showing how leaf-traces 
nodes. 
- Lycopodium annotinum. Diagram of the stem. x 30. 
Longitudinal section 
» » of the stem, showing the cavities which occur at 
the base of the leaves. x 5. 
gitudinal section of leaf-base : e., epidermis; m., loose cells at the 
base of the leaf ; c., cavity. x 200. 
Lycopodium annotinum. Appearance of pits in surface view. x 240. 
m complanatum. Diagram of stem, x 30. 
‘5 alpinum. ys $s x 30. 
b complanatum. Longitudinal secti 
on of stem, showing general character of cells: 
es; g., xylem; per., pericycle ; e., endodermis ; c., cortex. 
have spiral thickenings. x 150. 
P~, phloem-parenchyma ; $., sieve-tub 
Some of the cortical cells 
(Deleted.) 
Lycopodium obscurum. Longitudinal section of stem, showing outer cortical cells. x 240. 
4 inundatum, Diagram of stem. x 40. 
yi E. Transverse section of branch. x 250, 
A Selago. Diagram of stem. x 40. 
AME serratum. Diagram of old and young stems. x 40, 
ái Squarrosum. Diagram of stem, x 40. 
» nummularifolium. Diagram of stem, x 40. 
5 Phlegmaria, i 5 x 40. 
* cernuum. 5 3» x 40. 
» clavatum. Two seedlings, A, shows remains of prothallus, x L 
join on to vascular cylinder through 6 
ds 
SBF Ae mS MEA Wyte 
