BALFOUR—NEW SPECIES OF RHODODENDRON. 285 
My study of the genus suggests that these species fall into 
the following natural series :— 
Rh. anthopogon, D. Don. 
. Rh. ferrugineum, ror ; Rh. hirsutum, Linn. 
Rh. fragrans, Max 
. Rh. lapponicum, “Wahlenb. Rh. nivale, Hook. f. ; 
Rh. parvifolium, Adams. | 
. Rh. elaeagnoides, Hook. f.; Rh. lepidotum, Wall. ; 
Rh. obovatum, Hook. f.; Rh. pumilum, Hook. f. ; 
Rh. salignum, Hook. f. 
F. Rh. micranthum, Turcz. 
G. Rh. setosum,* D. Don 
mH DOWD 
Many species have been added to the Section Osmothamnus 
‘since Maximowicz wrote, and I am not yet in a position to be 
‘able to deal with it comprehensively. What I am to say relates 
to three of the natural series which I seem to see amongst the 
species named by Maximowicz—that of Rh. anthopogon, that 
of Rh. fragrans, and that of Rh. lapponicum. Descriptions of 
new species belonging to all of these are given above, and I 
have to add another natural series of which no species was 
known to Maximowicz—that of Rh. cephalanthum. I call the 
series respectively Anthopogon, Fragrans, Lapponicum, Cepha- 
lanthum, after the oldest-described species, and in that sense 
these designations appear in the discussion of specific relation- 
ships in the foregoing pages. 
ANTHOPOGON SERIES. 
G. Don instituted the Section Pogonatum, in which his 
Rh. anthopogon was the sole species, and I would have taken 
that name for the series but that the Section Pogonatum has 
had species thrust into it which are not of the series of Antho- 
pogon, and I wish to aggregate phyletic forms around a central 
type. 
*P The several characters of the Anthopogons are :— 
Aromatic shrubs with small short-stalked leathery leaves 
ultimately dark green above and blood red beneath with peltate 
scales composed of an umbo charged with shining red secretion 
and of a narrow few-armed fringe. An upper layer of scales 
on the under side of the leaf forms a smooth surface covering 
scales in all stages of development. Many scales of the twigs 
and petioles losing their disks become setae. Bracts of the 
capitate umbel broad not falling off until flower-opening, always 
lepidote and fringed. Calyx campanulate unequally lobed, lobes 
* Perhaps the grounds upon which I separated “‘ setosum” may not be valid. 
I have not yet been able to study it adequately. 
