[ig 



Materia] oi this species for distillation was obtained .it Rydal, N.S.W., 

 hi September, 1909. 11m yield oi oil was 0-038 pei cent, rhe oil was in general 

 agreement with that from Fagan's Creek, and contained .1 considerable amount 

 oi estei . the alcohol oi which was amyl, bul the solid a< id did noi agree with the 

 characters obtained with eudesmic acid. It is thus possible thai two esters 00 m 

 in the ml "i this species. Efforts were made to decide this point, and material 

 tor distillation was collected al Rydal m January, [920, bul unfortunately, 

 at this time oi the year, sufficienl oil was noi presenl to separate from the 

 distilled watei 



rhe Rydal oil had specific gravity at 15 C. 0-9474; rotation a B + 11-2°, 

 and refractive index at 20 = 1-4977. The saponification numbei for the esters 

 and free acid was 1 1^-3. 



The alcohol oi the ester was separated, oxidised to valeric acid, and the 

 silver salt oi this prepared ; the metallic silver thus obtained was 51-7 | per cent., 

 which is almost a theoretical result. It was thus evident that the alcohol of the 

 ester was amyl. 



The solid acid when purified was in paraffin-like Leaflets and melted at 

 76-5° C. ; by titration with a deci-normal solution of sodium hydrate, a molecular 

 value 135-6 was obtained. It was a saturated acid, and when treated with 

 manganese dioxide and sulphuric acid gave an odour of benvaldehyde. This 

 evidence points to this acid being phenyl-acetic acid. Unfortunately the species 

 produces almost the Least oil of any, so that sufficient for investigation was 

 difficult to procure. 



171. Eucalyptus Staigeriana. 



(F.v.M., in Edit. Bailey in Synopsis (Queensland Flora, 176, 1883.) 

 Lemon-scented Ironbark. 



Systematic. A medium-sized tree witli glaucous foliage. Leaves ovate 

 to lanceolate, usually under 5 indies long, obtuse, sometimes shortly pointed; 

 venation fairly distinct, especially on the under surface, intramarginal vein looped, 

 usually well removed from the edge, but sometimes quite close, lateral veins 

 spreading, inclined at about 45' to the mid-rib. Peduncles axillary or lateral, 

 4 to 6 lines long, each with three to six flowers, often in terminal panicles. Buds 

 glaucous; calyx tube semi-ovate, contracted to a. slender pedicel; operculum 

 conical. 



Fruit.- Semi-ovoid to hemispherical, on slender ^* --. 



pedicels; rim thin; valves slightly exserted ; ^4."^F 



about 2\ Lines long and 2 lines in diameter. , 



Perhaps the two fruits closest in morphological affinity 



■, I mi 1 1 ! m forms) and E. melliodora. 



Habitat. Palmer River, Queensland. 



ESSENTIAL OIL. the oil of this species of Eucalyptus is abnormal, as 

 it contain- the aldehyde citral in some quantity. The oil was referred to b\ 

 Schimmel & Co., in the year [888 (Semi Annual Report), the specific gravity 

 being re< ordi d as o-88o and the boiling point from 170 230 C, 



