6o 
M. G. Sykes 
Fig. 3a. Portion of fertile region of L. squarrosum ; (natural size). 
Fig. 3b. Sporophyll of ditto. 
Fig, 4a. Apical portion of fertile region of L. dalhousianum ; (natural size). 
The sporangia are to some extent hidden by the sporophylls. 
Fig. 4b. Sporophyll of ditto, showing incurved edges. 
Figs. 5 a. & b. Side and back view of sporophyll of L. inundatum, r = dorsal 
ridge. 
Fig. 6. Sporophyll of L. phlegmaria, showing incurved edges. 
Fig. 7. Sporophyll of L. clavatum with small dorsal flap. 
Figs. 8a & b. Front and side views of peltate sporophyll of L. alpinum. 
Fig. 9a. Cone of L. cernuum (natural size). The sporangia are entirely 
hidden by the sporophylls. 
Figs. 9b & c. Sporophyll of L. cernuum. ; f = downward flap ; g — groove in 
stalk of sporophyll into which fits the sporangium borne by the 
sporophyll next below. The mucilage cavity present in the stalk gives 
it a transparent appearance. 
Plate III. 
Fig. 1. Longitudinal section of the apical region of the stem of L. j elago, 
showing origin of (sp) sporangial, and (If) sporophyll rudiments, x 78. 
Fig. 2. Longitudinal section of the stalk of a sporangium of L. serratum, 
shewing typical elongated cells with their walls lignified at the 
corners. xll6. 
Fig. 3. Longitudinal section of axis of L. selago, comprising the area between 
two sporophyll traces. The inner and outer cortex are composed of 
more or less compact cells while the middle cortex is made up of very 
lacunar tissue. A few layers of compact cells surround the sporo¬ 
phyll trace and accompany it through the middle cortex, x 116. 
Fig. 4. Longitudinal section of part of a sporophyll of L. inundatum showing 
cells with lignified walls in the sporangium pedicel; a = axis of cone ; 
sp = stalk of sporophyll with trace ; ep = epidermis of sporangium 
with strongly lignified bars ; m.c. = mucilage cavity, x 78. 
Fig. 5. Two cells from the pedicel in Fig 4. x 400. 
Fig. 6. Part of a tracheide from the sporophyll trace in Fig. 4, showing a 
transition from a scalariform to a reticulate form of pitting, x 400. 
Fig. 7. Longitudinal section of very young sporophyll of L. cernuum showing 
young sporangium, in a position nearer the axil than in the adult cone; 
letters as above. xll6. 
Fig.8. Longitudinal section of part of adult sporophylll of L. cernuum; 
st = sporangium pedicel, which is composed of cells whose walls are 
strongly lignified in bars, x 116. 
Fig. 9. Longitudinal section of base of sporophyll of L. complanatum, showing 
the course of the sporophyll trace ; (see text), x 78. 
