(Mi'-i-d.] XXIX. RUTACE^. 207 



above 8 lines broad, coriaceous, narrowed into a rather short petiole, the midrib 

 prominent underneath. Flowers and fruit of tf. sididfolia, or the flowers some- 

 times, but not always, rather smaller. — 6'. peiuhda, Lindl. in Mitch. Trop. Austr. 

 251. Possibly a variety only of G. aaVu-ifolia, Benth. 



Hab.: Broadsound, R. Brown; Burdekin River, F. v. Mueller ; Belyando Eiver, Mitchell. 



Wood hard, tough, of close grain, yellow, and when fresh of an agreeable fragrance. — Bailey's 

 Cat. Ql. n'oods No. 47. 



17. PENTACERAS, Hook. f. 



(Referring to arrangement of carpels.) 



Sepals 5. Petals 5, valvate. Torus thick. Stamens 10 ; filaments subulate, 

 glabrous. Ovary of 5 nearly distinct carpels, each with a glandular terminal 

 appendage. Styles inserted below the middle and immediately united into one 

 filiform style, with a small stigma ; ovules 2 in each carpel, superposed. Fruit- 

 carpels 5 or fewer, often solitary by abortion, indehiscent, expanded all round 

 into a membranous wing, forming obovate or oval-oblong samarse, the centre 

 almost drupaceous, with a cartilaginous endocarp. Seeds usually solitary ; testa 

 thick ; albumen not copioas ; embryo straight, with ovate cotyledons. — Trees. 

 Leaves alternate, pinnate. Flowers numerous, small, paniculate. 



The genus is limited to a single species, endemic in Australia. It differs from Evodia in its 

 habit, alternate leaves, and in some measure in the ovary resembling that of several Biosmea, 

 and from that and all other Zanthoxylece by the fruit, which, at first sight, is like that of an 

 Ailanthus ; but the dotted leaves and superposed ovules, which place it among Batacece, besides 

 the inflorescence and other minor characters, amply distinguish Pentaceras from Ailanthus — 

 Benth. 



1. P. australis (Australian), Hook. f. in Benth. and Hook. Gen. PI. 298; 

 Benth. Fl. Austr. i. 865. A glabrous tree, small according to A. Cunningham, 

 attaining 60ft. according to W. Hill. Leaves pinnate, with a common petiole of 

 from 4 or 5in. to nearly 1ft.; leaflets usually 7 to 11, opposite in pairs, with a 

 terminal odd one, ovate to lanceolate, obtuse or acuminate, 2 to 4in. long, entire 

 or obscurely crenate, the lateral ones more or less oblique and dScurrent on the 

 petiolule on the lower side, like those of a Clausena. Panicles large, terminal, 

 spreading, loose, with numerous white flowers, pedicellate along the ultimate 

 branches. Petals about IJ line long. Stamens nearly as long as the petals. 

 Ovary glabrous. Ripe samarse 1 to IJin. or rather more in length, ^ to Jin. 

 broad. — Cookia australis, F. v. M. Fragm. i. 25 and iii. 27 ; Ailanthus punctata, 

 F. V. M. Fragm, iii. 42. 



Hab.: Brisbane Eiver, 4. CMmTOm^ftam, • Moreton Bay district ; M'Connell's Brush, Lfjc/i7iard(. 



Wood of a light-yellow, close-grained, and hard. — Bailey's Cat. Ql. Woods No. 48. 



18. PLEIOCOCCA, F. v. M. 

 (Cocci numerous.) 



Calyx 4-lobed, persistent. Petals deciduous. Filaments linear-subulate, 

 ciliate. Anthers and styles not seen. Cocci or carpels 5 to 9, slightly attached 

 to the axis for about a third of their length, the upper two-thirds free, tardily 

 separating into 2 valves. Endocarp not readily separating. Seeds 1 — 2. 

 Albumen very large. Embryo straight. Cotyledons nearly plane, oblong. 

 Radicle slender. — A small tree with large opposite coriaceous leaves and axillary 

 cymes of flowers. Carpels fleshy, epioarp sharply acid. — F. v. M. Fragm. ix. 

 117 (in part). 



The genus seems intermediate between Evodia and Acronychia, 



