COLLECTED IN DUTCH NEW GUINEA. 39 
ARGYROCALYMNA DENTICULATA, Ridl., sp. nov. 
Folia alterna, tenuiter coriacea, elliptico-ovata, cuspidata, acuta, basi obtusa, 
marginibus incrassatis, dentibus aculeiformibus, 13 em. longa, 5 cm. lata, nervis 
10 paribus subtus elevatis in dentes excurrentibus, aciculis minutis in utraque 
facie, petiolis canaliculatis 6 mm. longis. Cyme trichotome, axillares et terminales, 
hirte, 4-5 em. longs, patentes. Bractee angustz, lineares, lanceolate, 2 mm. 
longee, hirtze, pedicellis 4 mm. hirtis. Calyx obovoideus, 5-lobatus, 3 mm. longus, 
hirtus, lobis lanceolatis zequilongis acutis. Petala crassa, lanceolata, triangularia, 
acuta, longiora, pilis albis in medio obsita. Stamina 5, breviora, filamentis brevibus 
extra discum ortis. Anthere oblongæ, obtuse. Stylus pubescens, staminibus altior, 
stigmate obconico apice obscure lobato. Discus annulatus, pilis albis ad basin 
styli obsitus. Ovarium inferum, 5-loculare, ovulis plurimis. 
| Camp VIb, 3900 ft. 
| The branches of this plant are slightly flexuous. "The calyx and branches are covered 
| with flat triangular yellowish trichomes like those of species of Melastoma. 
ARGYROCALYMNA FLEXUOSA, Ridl., sp. nov. 
Caulis lignosus, flexuosus. Folia alterna, ovata, acuminata, acuta, margine 
denticulata, coriacea, superne in sicca virescentia, subtus cinnamomea, undique 
trichomatibus parvis acutis dissitis scabrida, 10 cm. longa, 45 cm. lata, petiolis 
5 mm. longis. Cyme@ quam folia breviores, hirtæ, di- vel trichotomze, 4 em. longe, 
3°5 cm. late. Bractee lineares, acute. Pedicelli 2 mm. longi, hirti. Flores 
parvi, 5 mm. lati. Calyx obconica, parva, lobis 5 ovatis lanceolatis acutis latis 
hirtis, apicibus recurvis. Petala 5, lanceolata, carnosa, acuta, extus pubescentia. 
Stamina 5, filamentis crassis. Discus obscure lobatus, rotundatus. Stylus crassus, 
stigmate capitato. 
Camp VI 5, 3900 ft. i 
Distinguished from A. arborea, Schum., by its flowers being pentamerous and the 
cymes much shorter. The disc has curious depressions in a circle on its surface. 
From A. denticulata, Ridl., it is distinguished by its much smaller obconic, not 
obovoid calyx-tube, and its larger sepals. 
ARGYROCALYMNA MONTANA, Ridl., sp. nov. 
Frutex densifolius, ramis copiose lenticellatis. Folia congesta, coriacea, rigida, 
. elliptica, oblonga, basibus latis, apicibus rotundatis, appresse denticulata, 2:5-5 em. 
longa, 1:5-2 cm. lata, costa superne canaliculata, nervis 5 paribus, petiolis brevibus, 
crassis 2 mm. longis. Cym« breves, dense, 2:5 em. long, 3 em. late, dense hirte. 
Pedicelli breves, hirti. Calyx brevis, latus, semiglobosus, hirtus, lobis ovatis 5. 
Petala 5, lanceolata, intus et extus hirta, fasciculo pilorum alborum in dimidio 
ornata. Stamina 5, glabra, filamentis gracilibus longiusculis, antheris brevibus 
ovoideis ellipticis. Stylus ad basin conicus, validus, hirtus. Stigma majusculum, 
capitatum. ain | 
Camp XIII, 10,500 ft. 
