38 MR. H. N. RIDLEY ON PLANTS 
POLYOSMA PUBESCENS, Ridl., sp. nov. 
Partes juveniles omnino pubescentes. Folia opposita, lanceolata, acuminata, basi 
aneustata, cuneata, coriacea, superne glabra, subtus pubescentia, 10 cm. longa, 
5'5 em. lata, nervis 8 paribus cum nervulis hirtis, petiolis 2 cm. longis hirtis. 
Racemus 13 cm. longus, rachi pubescente, floribus pluribus approximatis, pedicellis 
1 mm. longis pubescentibus. Bractee minute, lanceolate, acute. Ovarium 1 mm. 
longum, pubescens. Sepala 4, ovata, triangularia, acuta. Petala linearia, obtusa, 
8 mm. longa. Stamina filamentis linearibus hirtis. Stylus validulus, glaber, 
stigmate discoideo. 
Camp I, 500 ft. 
Nearest to P. letevirens, Griff, of the Malay Peninsula, but the flowers are much 
longer, and the leaves larger and thinner. 
QUINTINIA RIGIDA, Ridl., sp. nov. 
Frutex(?) ramis crassiusculis. Folia dense approximata, erecta, alterna, rigida, 
coriacea, oblanceolata vel elliptica, integra, marginibus involutis, apice obtusa, basi 
breviter cuneata, 5:5-6 cm. longa, 2-2:3 cm. lata, pagina inferiore atro-punctata, 
costa crassa subtus prominente superne depressa, nervis tenuibus 22 paribus, 
superne indistinctis, subtus obscuris, petiolis crassis 5 mm. longis. Racemi 
axillares, foliis breviores, 5 cm. longi, rachi angustata. lores parvi, deflexi, 
plures. .Pedicellilmm.longi. Calycis tubus obconicus, resinosus, lobis 4 oblongis 
obtusis. Petala 4, coriacea, valvata, lanceolata, acuta, 2 mm. longa, patentia. 
Stamina 4, e margine disci orta, filamentis brevissimis subtriangularibus basi latis 
superne attenuatis, antheris equilongis ovatis subcordatis, quam petala multo 
breviora. Discus magnus, 4-lobus, lobis obtusis superne excavatis. Ovarium 
conicum, 4-suleatum, stigmatibus capitatis 5. Capsula in pedicello 3 mm. longo 
nutans, 4-valvis, valvis acutis, sepalis persistentibus. 
Camps XI to XIII, 8300 to 10,500 ft. 
| Allied to Q. MacGregorii, F. Muell. of British New Guinea, but with much thicker 
and more rigid leaves and larger sepals. 
ARGYROCALYMNA, Schum. & Lauterb. 
This genus was founded by Schumann and Lauterbach (Flora der Deutschen Schutz- 
gebiete in der Südsee, 336) for a plant obtained in Dutch New Guinea with an inferior 
two-celled ovary and the petals, sepals, and stamens in fours. I add here three others, 
all of which, though obviously elosely allied, have the parts in fives, and a five-celled 
ovary. Schumann refers the genus to Saxifragaces, but I think this affinity very 
doubtful. The ovary is distinctly inferior, and much resembles that of the Melastomaceze, 
especially in A. flexuosa, Ridl., which is covered with appressed scale-like trichomes 
resembling those common in Melastoma. The leaves, however, are always alterna 
! y i , ernate 
and distinetly thorny along the edge. : 
