17 



NEW PAPUAN PLANTS. 



Described by Baron Von Mueller, R.C.M.G., &c. 



(Continued from Journ. Bot. 1891, 176.) 



Acronychia lobocarpa, sp. n. (Euodia lobocarpa F. v. M. 

 MS.). — Glabrous; leaves comparatively small, on rather bog and 

 slender petioles ; trifoliolate or some unifoliolate ; leaflets provided 

 with very short or hardly any petioles, thinly chartaceous, mostly 

 obovate, but at the base much narrowed, at the margin entire or 

 faintly and imperfectly crenulated ; peduncles slender, mostly 

 axillar, three-flowered or cymosely few-flowered ; calyx quite 

 minute, deeply and rather bluntly four-lobed ; petals four, small, 

 linear-elliptical, at the summit inflexed; stamens much shorter 

 than the petals, their filaments subulate-linear ; style rather short, 

 as well as the ovulary, glabrous ; stigma capitellate, hardly lobed ; 

 fruit quite small, dry, rather conspicuously four-lobed, imperfectly 

 dehiscent towards the summit ; seeds solitary in each cell. 



On Mount Yule, with Euodia EUeryana. 



Leaves usually 1-1 h in. long. Petals only of | in. length. 

 Style terminal. Fruit "somewhat broader than long. Endocarp 

 thin. Seeds oblique-ovate, outside dark-coloured and somewhat 

 rough. Albumen copious. Cotyledons flat. Merely one flower 

 was available, and that certainly had only four perfect stamens, 

 although between two of them occurred the rudiment of a fifth ; 

 the filaments iu this instance were glabrous, but thofie adhering 

 still to some fruits were found to be eight in number, and had 

 ciliolated filaments; but this may have been a case of casual 

 variability, not depending on partial unisexuality. 



This species differs from the New Caledonian A. Lmnonia, 

 according to Turpin's delineation, in the following characteristics: — 

 the leaves are usually compound and provided with longer petioles, 

 the leaflets are smaller, but towards the summit broader, the 

 stamens and style are shorter, and the fruit is remarkably lobed. 

 From the Polynesian A. retusa the Mount Yule plant differs also in 

 smaller and mostly trifoliate leaves, longer pedicels, elongated style, 



and probably also in form of fruit. 



This new plant particularly demonstrates the close affinity of 

 the genus Acronychia to Euodia, and certainly the two should stand 

 systematically not far apart from each other. This observation 

 applies of course to FAiodia in the wider sense, including Meiicope, 

 an extension of the genus adopted already, 1860 (Fragm. Phytmjr. 

 Austr. ii. 102), in which I was followed by Baillon, 1873 (Hist, des 

 Plantes Butacees, p. 469). That the double number of the stamens 

 in Meiicope would be a very feeble generic note is shown by the 

 genus Boronia, of not very distant affinity, in which some few 

 species with four sterile stamens occur (just as in one Euodia), 

 thus rendering also Zieria hardly tenable beyond a subgenenc 

 position. 



(To be continued.) 



Journal of Botany.— Vol. 30. [Jan. 1892.] c 



