10 'ME. H. N. EIDLET ON PLANTS 



DICOTYLEDONES. 



POLYPETAL^. 



By H. N. Ridley. 



RANUNCULACE^. 



IIa-NUNCTjltjs amerophylltjs, v. voa Muell. in Trans. Roy. Soc. Vict. i. part ii. (1889) 1. 

 Camps XII to XIV, 10,500 to 12,500 ft. 

 Disirib. British New Guinea, Mt. Scratch ley. 



Ranunculus lappaceus, Sm. in Rees, Cyclop, xsis. 01, var. scapigebus. 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-li-Iobed, 1'5 cm. long and as wide, and the Mowers 

 and achenes smaller. 



Camps IX to X, 5500 to 6700 ft. Mowers yellow. 



Dlstrib. British New Guinea, Mt. Scratchley, GiuUanetti (Herb. Kew.). 



Ranunculus lappaceus, Sm., is a native of Australia, and is usually a plant of 

 some size. The variety scaplgerus, 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 cm. longis 

 hirtis, lamina coriacea hirta obcuneata triloba basi angustata 2-5 cm. longa 1 cm. 

 lata quo latissima, lobo medio longiore lanceolate subacuto 8 mm. longo 3 mm. 

 lato. Scapl 7-10 cm. alti, saepe bitlori, hirti. Bractea floris inferioris foliacea, 

 lanceolata, Integra, obtusa, hirta. Sepala lanceolata, acuta, hirta, 3 mm. longa. 

 Petala 5, obovata, unguiculata, obtusa, 6 mm. longa, 3 mm. lata, in dorso 

 purpurascentia, flava. Sfamiim ad 30, antheris ellipticis. Carpella 12-15 pai'va. 

 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 

 cuneate trilobed form. 



Thalictrum papuanum, Ridl., sp. nov. 



Kerha gracilis, simplex, 16-17 cm. alta. Caulis basi longe nudus. Folia 2, in medio 

 cauii aj)prosimata vel per 5 cm. dissita, triioiiolata, glabra, i'oliolis obovatis triiobis 

 1 cm. longis 7 mm. latis, lobis brevibus rotundatis obtusis, nervis prominulis, 

 petiolo 1 mm. longo, petiolulo intermedio 2 mm. longo, lateralibus 1 mm. longis. 

 jPedunculi pars supra folia sita cm. longa. Flores 2. Bractece foliacese, ovatse, 

 lanceolatsBj inferior 5 cm. longa, summa minor. Sepala 4, oblonga, ovata, subacuta, 



