SÉANCE DU 30 AVRIL 1880. 
230 
1. Rhododendron ncriiflorum, Sp. I10V. 
Frutex. Folia oblongo-lanceolata abrupte et breviter acuminata, utrinque glaber- 
rima, subtus glauco-albescentia, nervis secundariis 12-15, rectis, retieulo nervulorum 
elevato, relis inæqualibus. Flores 10-„I5, rosei, haud conferti, mox patentes subcernui; 
pedunculi tomentosi; calyx membranaceus, laie campanulatus, lobis late ovatis vel 
ovato oblongis; corolla pollicaris, glabra, aperte campanulata, lobis 5 fere æqualibus; 
slamina inclusa, filamentis glabris ; ovariutn dense villosum. 
Yun-nan, in monte Tsang-chan (Delavay, n° 294). 
2. R. calophytuni, Sp. 110V. 
Arbor. Folia ampla, crasse coriacea, sub anthesi subtus perfecte glabra, e basi longe 
attenuata oblongo-ovata, nervis secundariis utrinsecus usque 20-23, retieulo nervulorum 
parum elevato, æquali, demum quasi granulato. Flores 15-20 fasciculati, purpurei vel 
rosei, vel albi; pedunculi glabri; calyx disciformis, lobis ovatis fere inconspicuis; 
corolla fere bipollicaris, late aperteque campanulata, lobis 7-8; stamina 20-22, inclusa, 
filamentis basi tantum scabris; ovarium glabrum. 
Tbibet or., ad Moupinc, ait. 4000 m. (A. David). 
3. R. décorum, Sp. 110V. 
Frutex. Folia crasse coriacea, e basi obtusa vel rolundata oblongo-ovata, utrinque 
glaberrima, subtus glauca, nervis secundariis utrinsecus 17—18, iinmersis, retieulo vix 
prominulo, retis inæqualibus. Flores magni, albi vel rosei, immaculati inter se distan¬ 
tes; pedunculi glandulis ocbraceis conspersi ; calyx disciformis, glandulosus, lobis haud 
distinctis; corolla fere bipollicaris, late aperte campanulata, lobis 7 undulatis ; stamina 
16, filamentis basi pubcscentibus; ovarium glandulis ocbraceis dense obsitum. 
Tbibet or., ad Moupine, ait. 3000 m. (Ad. David); Yun-nan ad montem Tsong-cban, 
ait. 2200 m. (Delavay, n u 1123) et supra Ta-pin-tze (forma floribus roseis). 
4. R. oreoiloxa, Sp. nOV. 
Frutex. Folia coriacea utrinque giaberrima, subtus (in sicco) lutescentia, e basi bre¬ 
viter attenuatrt lanceolato-elliptica, nervis secundariis utrinsecus 13—15 parum promi- 
nulis, retieulo nervulorum elevato, retis tenuissimis æqualibus. Flores 10-12 dense 
congesti, rosei, purpureo-punctati ; pedunculi glabri, brèves; calyx vix conspicuus, 
obsolète 5-dentatus ; corolla ultrapollicaris campanulata, lobis 8 rotundatis; sta¬ 
mina 14, filamentis basi brevissime pilosulis; ovarium et Stylus glaberrimi. 
Tbibet or., ad Moupine (A. David). 
5. r. rot midi folium Arm. David, Asiatic Soc. North China Branch 
(1871-1872), p. 216; R. orbiculare Decaisne, Fl. des serres, XXII, 
p. 169, in nota. 
Tbibet or., in monte Houang-chan-Thin, prope Moupine, ait. 4000 m. (A. David). 
6. R. Davidi, Sp. 110V. 
Frutex elatus. Folia coriacea utrinque glaberrima, subtus (in sicco) lutescentia, anguste 
oblongo-lanceolata, nervis secundariis utrinsecus 12-16, parum conspicuis, retieulo 
nervulorum elevato, regulari, retis minutis. Flores 8-10, inter se distantes, magni, 
lilacini, superne purpureo punctali ; pedunculi simul ac calyx glandulis rufis dense 
obsiti; calyx fere inconspicuus, lobis obsoletis, rotundatis; corolla extus basi glan- 
