the Genus Streptopogon . 135 
habitu coloreque setifero simillimus, foliisque siccitate laxe 
adpressis, species autem diversa videtur foliis pilo breviore, 
perichaetialibus vix caulinis diversiformibus, haud superne 
angustatis, limbo angusto obscuro marginatis et florescentia.’ 
In the diagnosis of 5 . latifolius the inflorescence is stated to 
be dioicous, and the leaves are described as ‘e cellularum 
serie unica minorum obscuriorum anguste limbata ’ ; while 
S. setiferus is stated to be monoicous. First, with respect to 
this alleged difference of inflorescence, it must be noted that 
Hampe does not describe the inflorescence of Lindigii ; 
and on dissecting fruiting plants of authentic specimens of 
vS. Lindigii in the Kew Herbarium, and of the type at the 
British Museum, I have not been able to find any male 
flowers. I have also failed to find any male flowers on the 
numerous fruiting stems of S. setiferus , Mitt., that I have 
examined. Mitten says of S. setiferus , ‘ flores masculi >S. ery- 
throdonti In 5 . erythrodontus the male flower is seated on 
the stem close below the perichaetium (see Fig. 17). Now, 
in vS. setiferus there constantly occurs on the stem, just below 
the perichaetium, an innovation bud (see Fig. 42), and I think 
it is just possible that this bud, when very young, may have 
been mistaken for a male flower. If, as I feel convinced we 
must dp, we regard 5 . Lindigii (S. setiferus , Mitt.) as really 
dioicous, then the only important difference alleged between 
this species and 5 . latifolius is the presence of a ‘limbus 
angustus ’ in the leaves of the latter plant. An examination 
of the type specimens of 5 . latifolius in Mitten’s herbarium 
shows that the marginal cells in the lower half of the leaf are 
sometimes slightly different from those of the rest of the leaf. 
These marginal cells have their walls unthickened, and differ 
only from the adjacent leaf-cells in being slightly longer 
(Fig. 53); at about the middle of the leaf they cease. Whether 
or not it is considered that these marginal cells are sufficiently 
distinctly marked off to constitute a ‘ limb ’ — and in my 
opinion they are not — they are certainly to be found also 
in the leaves of vS. Lindigii (S. setiferus , Mitt.). Fig. 54 is 
drawn from the type specimen of setiferus in Mitten’s 
