318 DIAGNOSES SPECIERUM NOVARUM. 
ovata petiolo circ. 5 mm. longo praedita, cetera majoribus 
subsimilia ; stipulae laminis foliorum minorum subsimiles late 
ovatae persistentes. Flores albi in pedunculis usque ad 2.5 cm. 
longis subglabris terminalibus umbellatim dispositi; pedicelli 
6-8, + 5 mm. longi subglabri; bracteae plures late ovatae 
pedicellis multo breviores sparse minute pilosulae, involucri- 
formiter aggregatae. Calycis circ. 3 mm. longi tenuiter mem- 
branacei tubus subcampanulatus circ. 1.5 mm. longus extus 
minute villosulus, lobi 5 ‘fere rotundati glabri. Corolla 5 mm. 
longa vel paulo ultro haud bene aperta extus sparse pilosula. 
Stamina 5 filamentis brevissimis antheris cohaerentibus truncato- 
rostratis. Fructus deest. 
Borneo :—Sarawak. 1865-67. Beccari. No. 150 in Herb. 
ew. 
Gunong Bayat, Sarawak. March 1914. Native Collector. 
No. D131 in Herb. Edin. 
This species much resembles an Elatostema in habit, as does 
the closely allied species A. Elatostemma, Hook. f. 
Argostemma sarawakense, W. W. Sm. Sp. nov. 
Species ex affinitate A. Elatostemmatis, Hook. f., et A. 
ophirensis, Maingay, et A. johorensis, Ridley; caule glabro, 
parium foliis minoribus stipulas simulantibus et aequantibus 
inter alia recognoscenda. 
Planta herbacea 30 cm. alta vel paulo ultra. Caulis basi 
+ prostratus nodis radicans supra ascendens vel suberectus sat 
foliosus subteres striatulus mox albescens squamuloso-decorti- 
cans. Folia opposita valde inaequalia ; majora 6-12 cm. longa, 
(plerumque 7-8 cm.), 1.5-4 cm. lata, ovato-lanceolata vel 
lanceolata vel lineari-lanceolata apice acuta vel longiuscule 
acuminata basi rotundata vel + late cuneata integra vel margine 
paulo undulatula coriacea supra atroviridia glabra subtus 
tomento brevissimo fulvido dense velata; costa subtus paulo 
elevata glabrescens, ut linea nigrida apparet; nervi utrinque 
6-8, supra obscuri subtus distincti; petioli + 5 mm. longi; 
parium folia minora 6-7 mm. longa lanceolata vel sublinearia 
sessilia vel subsessilia glabra vel sparse pilosula in caule inferi- 
ore saepe delapsa; stipulae foliis minoribus subsimiles paulo 
latiores saepe ovato-lanceolatae integrae. Flores albi in pedun- 
culis usque ad 3 cm. longis glabris terminalibus umbellatim 
dispositi ; pedicelli + 12, + 1 cm. longi + pilosuli; bracteae 
plures stipulis subsimiles involucriformiter aggregatae. Calycis 
subcoriacei nec reticulato-venosi tubus subcampanulatus circ. 
2 mm. longus extus + fulvo-pilosulus, lobi 5, circ. 2 mm. longi, 
_ + late ovati + obtusi, extus pilosuli vel subglabri intus glabri. 
_ Corolla 4-5 mm. longa ad medium vel ultro 5-partita (raro 
