132 
Salmon . — A Monograph of 
informs me that there are four more capsules on the specimens 
in Muller’s herbarium. These are all without an operculum, 
and ‘ show no trace of a peristome.’ As the capsules are all 
old it is impossible to say at present whether they are 
gymnostomous or not. The present plant differs from other 
species of Streptopogon in the presence of a true annulus. 
The stem of rigidus , as seen in transverse section, con- 
sists of large polygonal cells with thin walls, surrounded by 
two or three peripheral rows of thick-walled cells ; there is no 
‘ central-strand.’ 
The gemmae are densely crowded into a globose head at 
the apex of the leaf. Each gemma when mature is divided 
both transversely and longitudinally (see Figs. 39, 40, 8o, 89, 
92) ; the cells are brownish in colour, except frequently those 
at either end, which are paler or nearly colourless. The 
gemmae are usually to be found germinating amongst the 
leaves of the lower part of the stem, giving rise to long 
threadlike branches which frequently show the oblique septa 
characteristic of rhizoids (Figs. 95, 96). 
The leaf-nerve is seen in transverse section to be composed 
of ‘ pointer-cells ’ and a single strongly developed dorsal 
stereid-band (Fig. 94). 
S. Lindigii, Hampe (Figs. 41-61). 
S. Lindigii, Hampe, in Ann. Sci. Nat., 5 e sdr., iii, 351 (1865); 
Mitt., Muse, austr.-amer., 178 (1869) ; Jaeger, Adumbr. i, 255 (1873) 1 
C. Mull., Gen. Muse. Frond., 421, 423 (sect. Eustreptopogon ) (‘ 1901/ 
i.e. 1900); Broth, in Engler and Prantl’s Natiirl. Pflanzenfam., 214. 
Lief., p. 418 (sect. Eustreptopogon ) (1902). 
S. latifolius , Mitt., Muse, austr.-amer., 179 (1869) ; Jaeger, Adumbr. 
i, 2 55 (1873); Paris, Index bryolog. in Actes Soc. Linn. Bordeaux, 
li, 276 (1897); C. Mull., Gen. Muse. Frond., 421, 423 (sect. Eu- 
streptopogon) (‘ 1901/ i.e. 1900) ; Broth, in Engler and Prantl’s Natiirl. 
Pflanzenfam., 214. Lief., p. 418 (sect. Eustreptopogon) (1902). 
S. setiferus , Mitt., Muse, austr.-amer., 180 (1869) ; Jaeger, Adumbr. 
i, 255 (1873) ; Paris, Index bryolog. in Actes Soc. Linn. Bor- 
deaux, li, 276 (1897); C. Mull., Gen. Muse. Frond., 421, 423 
