118 BALFOUR—NEW SPECIES OF RHODODENDRON. 
otherwise exhibits. One notes that the upper surface of 
the young leaves produces but few peltate scales and these 
chiefly near the base of the lamina where it is about to join the 
petiole and, as if by way of substitute protection the whole 
surface becomes shortly puberulous. One may say that there 
is over the whole plant a tendency to a development of hairs 
alongside of and taking the place in part of peltate scales—on 
the pedicels along with the scales, supplanting the scales on 
the bracteoles, profusely covering the calyx-lobes associated 
with but a few scales. Then the style and stamens are both 
slightly longer than the corolla, and the style is longer than the 
longest stamens—only slightly so but clearly. 
Rh. invictum has its nearest ally perhaps in Rh. pholidotum, 
but the pointed leaves, umbels with more flowers, closer-set 
scales of that species are superficial diagnostic characters to 
take along with the special features already mentioned 
which are shown by Rh. invictum. In Rh. invictum, as in Rh. 
pholidotum, the slight zygomorphy of the flower is marked. I 
am not sure but that the character really marks all the species 
in the series, but I have insufficient material and observation 
for a precise statement. 
Rhododendron mallotum, Balf. f. et Ward. 
Arbor macera 3-5 m. alta. Rami crassi annotini 6 mm. 
diam. indumento tomentoso crasso persistente primo fulvo mox 
griseo-nigricante omnino involuti, indumenti pilis scopiformibus 
multiramosis ramis longis aseptatis acutis ab apice stipitis longi 
nudi multicellularis erecto-patentibus haud intertextis nunc 
stipitem ex toto induentibus. Folia petiolata ad 9.3 cm. longa ; 
lamina crasse coriacea elliptico-oblonga vel obovata ad 8 cm. 
longa 4 cm. lata apice rotundata tuberculo-mucronata margine 
cartilaginea paullo recurva basi late obtusa vel subrotundata,- 
supra atro-viridis subbullata costa media basi crassa subelevata 
sursum sulcata tomentosa sed glabrescente venis primariis 
* utrinsecus ad Io sulcatis caeteroquin glabra, subtus indumento 
crasso fulvo ei ramorum simili venas occludente ubique vestita ; 
petiolus crassus ad 1.3 cm. longus 3 mm. diam. indumento 
fulvo ex toto involutus. Flores in racemo-umbellam terminalem 
multifloram (ad 20-) dispositi ; bracteae bracteolaeque ignotae ; 
pedicelli breves crassi circ. 7 mm. longi indumento fulvo involuti 
sub flore obliqui. Calyx obsoletus omnino indumento obtectus 
dentes 5 minutos exhibens. Corolla kermesina tubuloso-cam- 
panulata carnosula circ. 3.5 cm. longa omnino glabra basi 
5-gibbosa retusa et intus septis incompletis petalinis divisa 
5-lobata, lobis obcordatis circ. 1 cm. longis 2 cm. latis subcrenu- 
latis. Stamina Io inaequalia longiora circ. 2.8 cm. longa corolla 
