BALFOUR—NEW SPECIES OF RHODODENDRON. | 161 
lanceolata ad 9.5 cm. longa 4 cm. lata apice subacuminata 
mucrone tuberculato terminata margine cartilaginea paullo 
recurva obscure undulata basi obtusa saepe inaequilateralis, 
supra olivacea opaca laevis costa media sulcata squamis 
marcidis lepidota venis primariis utrinsecus circ. 7 paullo con- 
spicuis glabra sed squamarum juvenilium peltatarum vestigiis 
notata, subtus fulvida costa media venisque primariis pro- 
minulis ubique dense (costa media leviter) lepidota, squamis 
biformibus, paucis majoribus ad 0.5 mm, diam. conspersis 
caeteris minoribus fere contiguis (areis inter squamas angustis 
pallide viridibus) secretione rubra vel aurantiaca impletis 
instita lata integra (in squamis majoribus saepe lobata) cum 
umbone aequilata; petiolus circ. I cm. longus imbricatim 
furfuraceo-lepidotus supra sulcatus. Flores in umbellas termi- 
nales 2—3-floras dispositi ; bracteae exteriores crustaceae rotun- 
datae vel ovatae flabelliveniae obtusae vel acutae ad 2.5 cm. 
longae dorso puberulae et lepidotae pilis brevibus albis ciliatae 
intus centro sericeae, interiores spathulatae ad 3.5 cm. longae 
carinatae mucronatae similiter ac exteriores vestitae ; bracteolae 
rubrae lineares longissimae circ. 3.5 cm. longae ex toto pilosae 
elepidotae ; pedicelli crassi circ, 1.2 cm. longi imbricatim fur- 
furaceo-lepidoti. Calyx patelliformis brevis circ. 1 mm. longus 
margine undulata lobos 5 semi-lunatos vix formante extus dense 
lepidotus setis albidis ciliatus. Corolla pallide rosea infundibuli- 
formis circ. 7.5 cm. longa, tubo extus puberulo et ubique lepi- 
doto intus puberulo sursum in lobos 5 éxpanso, lobis latis 
obovatis circ. 3.8 cm. longis 3.3 cm. latis crenulatis apice rotun- 
datis vel subobtusis vena media conspicua. Stamina io in- 
aequalia longiora circ. 5.7 cm.. longa antheris oblongis 7 mm. 
longis, breviora circ. 4 cm. longa antheris circ. 5 mm. longis, 
filamentis deorsum dilatatis a basi ad trientem puberulis. Discus 
sub ovario puberulus. Gynaeceum circ. 8 cm. longum corollam 
paullo superans ; ovarium conoideum sulcatum circ. 6 mm. 
longum a stylo haud constrictum dense imbricatim lepidotum 
squamis ramentaceis ; stylus longus a basi ad medium lepidotus 
sub stigmate discoideo magno latiore haud expansus. 
Species distincta a Rh. Ludwigiano, Hoss. specie altera 
siamensi ejusdem affinitatis longe recedens ; illa ramos glabros, 
folia floresque pedicellosque multo minores possedit ; Rh. 
ciliicalyci, Franch. et speciebus aliis sinensibus etiam affinis 
sed indumento densiore distincta. i 
Siam. Chiengmai, Doi Sutep. 1500 m. Spreading shrub 
about 4 m. high ; flowers pale pink. On rocky ground in open 
evergreen jungle. Dr. A. F.G. Kerr. No. 3238. 7th June 1914. 
€ proper placezof Rh. Surasianum amongst rhododen- 
drons is beyond question. It is one of the set of species belong- 
