10 MR. H. N. RIDLEY ON PLANTS 
DICOTYLEDONES. 
POLYPETALZZ. 
By H. N. RIDLEY. 
RANUNCULACEA. 
RANUNCULUS AMEROPHYLLUS, F. von Muell. in Trans. Roy. Soc. Vict. i. part 11. (1889) 1. 
Camps XII to XIV, 10,500 to 12,500 ft. 
Distrib. British New Guinea, Mt. Scratchley. 
RANUNCULUS LAPPACEUS, Sm. in Rees, Cyclop. xxix. 61, var. scAPIGERUS, Hook. f., 
subvar. PAPUANUS, Ridl., subvar. nov. 
Differs from the typical variety in having the petioles and peduncles more slender 
and rather less hairy, the leaves 3-4-lobed, 1:5 cm. long and as wide, and the flowers 
and achenes smaller. 
Camps IX to X, 5500 to 6700 ft. Flowers yellow. 
Distrib. British New Guinea, Mt. Scratchley, Giulianetti (Herb. Kew.). 
Ranunculus lappaceus, Sm., is a native of Australia, and is usually a plant of 
some size. "The variety scapigerus, Hook. f., is a small reduced mountain plant from 
Tasmania. 
RANUNCULUS TRIDENS, Ridl., sp. nov. 
Caulis crassus, 2 cm. longus. Folia in apice caulis congesta, petiolis 5 em. longis 
hirtis, lamina coriacea hirta obcuneata triloba basi angustata 2-5 cm. longa 1 em. 
lata quo latissima, lobo medio longiore lanceolato subacuto 8 mm. longo 3 mm. - 
~ lato. Scapi 7-10 em. alti, sepe biflori, hirti. Bractea floris inferioris foliacea, 
lanceolata, integra, obtusa, hirta. Sepala lanceolata, acuta, hirta, 8 mm. longa. 
Petala 5, obovata, unguiculata, obtusa, 6 mm. longa, 3 mm. lata, in dorso 
purpurascentia, flava. Stamina ad 30, antheris ellipticis. Carpella 12-15 parva. 
Camps XII to XIII, 10,500 to 12,500 ft. 
This species is allied to R. lappaceus, Sm., but its foliage is very distinct, though one 
occasionally sees leaves on specimens of that species which tend towards this long 
euneate trilobed form. 
THALICTRUM PAPUANUM, Ridl., sp. nov. 
Herba gracilis, simplex, 16-17 cm. alta. Caulis i longe nudus. Folia 2,in medio 
cauli approximata vel per 5 em. dissita, trifoliolata, glabra, foliolis obovatis trilobis - 
1 em. longis 7 mm. latis, lobis brevibus rotundatis obtusis, nervis prominulis, — 
petiolo 1 mm. longo, petiolulo intermedio 2 mm. longo, lateralibus 1 mm. longis. 
Pedunculi pars supra folia sita 6 cm. longa. Flores 2. Bractee foliaceæ, ovate, — 
. lanceolate, inferior 5 em. longa, summa minor. Sepala 4, oblonga, ovata, subacuta, © 
