22 RECORDS OF OBSERVATIONS ON SIR WILLIAM MACGREGOR 'S 
Rhododendron gracilentum. 
Branchlets thin, somewhat rough; leaves very small, in whorls of few, 
short-stalked, from ovate-to elongate-lanceolar, slightly recurved at the margin, 
faintly crenulated, beneath much paler and there grandular-dotted; flowers 
comparatively small, terminal, on conspicuous very thin pedicels; calyx membranous, 
nearly obliterated, glandular-dotted outside, at the margin slightly lobed; corolla 
almost glabrous, its tube cylindric, about three times longer than the lobes ; stamens, 
ten, about as long as the corolla; filaments capillary, glabrous; anthers dark, only 
about twice as long as their breadth; style beset with minute hairlets ; stigmas, 
united truncate, hardly dilated; ovulary cylindric-conical, somewhat rough, five- 
furrowed. 
Mount Musgrave, at 8000 to 9000 feet elevation. 
Leaves a third to two-thirds of an inch long. Pedicels about half as long as 
the flowers. Corolla probably red, bearing outside some squamular glandules, 
measuring about three-quarters of an inch in length; the tube hardly more 
than a sixth of an inch wide. Style during anthesis nearly half an inch long, 
upwards very thin. Fruit as yet unknown. In general aspect the plant resembles 
to some extent small forms of Prionotes cerinthoides, but the leaves are not so much 
crenulated. Prionotes indeed has more the aspect of an Agapetes than that of 
an epacrideous plant. Among congeners this one can as regards near affinity only 
be compared to R. Papuanum; but the characteristics of that plant, as given by 
Beccari, are too much at variance with those of ours, to consider both forms of one 
species ; he describes the leaves as broader, particularly upwards, the pedicels as of 
nearly twice the length of the flowers, the calyx as more indented, and the stigmas 
as conspicuously disconnected. RK. ericoides has crowded leaves of less breadth, and 
almost lanceolar calyx-segments, but is otherwise not dissimilar. 
Rhododendron Lowu ; J. Hooker, icones plantarum, 883 (1852). 
Mount Musgrave. 
To this Rhododendron has been referred the species with large yellow flowers, 
especially mentioned as being so showy in Sir W. Macgregor’s diaries. It differs 
from the typical plant, obtained at Kini Balu, only in pedicels twice as long as the 
flowers, in corollas of somewhat larger size, in rather longer as well as narrower 
anthers and particularly in the much dilated almost hemispheric stigma of a width 
three times greater than that of the style. In the absence of any knowledge, 
concerning the fruit of both the Borneon and the Papuan plant, it has not been 
ventured, to separate the latter specifically, less so as the very marked difference in the 
size of the stigmatic body may perhaps be accounted for by dimorphism. Should 
however hereafter from ampler collections the specific diversity of the two plants be 
demonstrable, then the name megalostigma might be assigned to the Papuan plant. 
