166 
Drpiscus ARFAKENSIS Gibbs, sp. nov. 
Planta perennis; caules erecti vel decumbentes, glabri, teretes, tenuiter striati, 
remote foliati. Folia alterna, petiolata, petiolis basi dilatatis, longe setoso- 
ciliolatis, ad basin quasi 3—5-partita, laxe setoso-pilosa. Scapi in axillas foliorum 
teretes, nudi. Umbella multiflora, pedicellis glabris, compressis, floribus multo 
longioribus, involucrum polyphyllum, foliola lineare-lanceolata, 1-2 dentata. 
Calycis dentes 5, deltoidei, persistentes. Petala alba, obovata, apice acuta, plus 
minus inflexa. Fructus a latere valde compressus, late cordato-rotundatus ; meri- 
carpia «qualia, glaberrima, 3-vittata. 
Hab. Arfak Mts., on ridge running up to the Angi lakes, 8000’. FI., 
Fr. (yg.). Dee. 5513. 
A plant with spreading radiating branches +3 dm. long. Radical 
leaves on petiole +45 cm. long are 3 cm. long and +4 cm. across, 
broadly rotundate, 3-partite, each part 2—3-lobed, the lobes further divided 
into unequal rounded-acute teeth, with white setose hairs in the sinuses and 
along the veins. The leaves on the branches occur singly at each node, at 
diminishing intervals, from 10 cm., up the stems, with sparsely setose petioles, 
the longest being +3-5 cm.; the laminz are more finely divided than is the 
case in the radical leaves and are somewhat pentamerous in ontline, +5 cm, 
across and 2°5 cm. long, 3-partite, the two lateral parts being divided again 
to the midrib, so that they appear 5-partite. Peduncles +2 cm. long arise 
singly in the axils of the upper leaves, bearing umbels 1 cm. long by 
1°5 cm. broad, the involucre equalling or slightly exceeding the pedicels, 
+6 mm. long. Flowers 2°5 mm. across. Stamens +1°5 mm. long ; 
anthers *) mm. long. Style °5 mm. long. Mericarps immature, 3-ribbed. 
This species belongs to Domin’s Calycina group (p. 42) with calyx 
of tive triangular teeth, and is nearest to D. saniculfolius (Stapf) Merr., 
var. brachystylus Dom., from Mt. Scratchley ; it is more robust in habit and 
less hirsute, but may prove identical on more material becoming available. 
Domin considers the Calyeina group in Didiscus, which includes the palao- 
tropic species, to represent the more ancestral branch of the family ; 
Pseudocalycina showing atavistic tendencies. To quote Domin, “the 
presence of the calyx teeth in the endemic species in the Malayan and 
Papuan provinces, also in the Queensland D. geraniifolius (Bail.) Dom., 
must be considered as an older and more ancestral cundition.” The aduittas 
of two more species in these groups to the New Guinea Flora certainly 
confirms the correctness of this view. The four species now known from the 
mountains of Malaya include J). celebicus (Hemsley) Dom., from Bonthain 
Peak, 10,000’, in 8. Celebes; D. saniculefolius, from eaabehe: 7000— 
13,000', Mt. Halcon in the Philippines, 7300’, and New Guinea at 10,000’, 
with the above. 
