338 PHANEROGAMI A. 



with the sutures opening. 10. Vertical section of the same, and of 

 one of the seeds, showing the embryo. 11. A seed detached. — All 

 the analyses more or less magnified. 



4. Acronychia retusa, Sp. Nov. (Tab. 34.) 



A. subglabra; foliis membranaceis obovatis ovalibusve retusis basi sub- 

 acutis; peduncidis petiolo vix longioribus ; cymis plurifloris ; floribus 

 polygamis ; stigmate peltato-quaclrilobo subsessili. 



Hab. Samoan or Navigators' Islands. 



A shrub or tree (the size not recorded), glabrous, except a slight 

 pubescence on the young shoots, &c. Leaves thin and membranaceous, 

 opposite, from 2 to 3 J inches long, obovate or oval, with a more or less 

 acute base, retuse at the apex, entire, or obscurely undulate, sparingly 

 feather-veined, pale green and dull, nearly of the same hue both sides, 

 thickly punctate with pellucid dots; the base obscurely articulated 

 with the apex of the petiole, which is from 5 to 8 lines long. Pedun- 

 cles axillary, equalling or slightly exceeding the petioles in length, 

 bearing rather numerous flowers in a small cyme. Bracts and bractlets 

 minute, subulate. Pedicels only a line long. Flowers dioeciously 

 polygamous; the male (with very small flower-buds) having a sterile 

 ovary, with an effete and less thickened stigma ; the female (flower- 

 buds a line and a half long) having effete anthers : otherwise nearty 

 similar. Calyx glandular-dotted, four-cleft to the middle ; the short 

 lobes ovate and obtuse, or in the male flowers acutish. Petals 4, 

 white or whitish, valvate in aestivation, with a minute inflexed point 

 at the apex, ovate-oblong, glandular-dotted, glabrous or nearly so. 

 Stamens 8 : filaments short, the alternate ones shorter, glabrous but 

 obscurely glandular, sparingly ciliate towards the base : anthers cor- 

 date-didymous. Ovary ovoid, obscurely pubescent, at length covered 

 with pulverulent glands, raised on a short and thick disk or gynobase, 

 four-celled, crowned with a large and purple, somewhat peltate and 

 four-lobed, subsessile stigma. Ovules 2 in each cell, amphitropous, 

 ascending. Fruit unknown. 



This species is evidently a congener of Acronychia Endlicheri, 



