32 



4. Eucalyptus trachyphloia. 



(F.v.M., in Jour. Linn. Sue, iii, go.) 

 A Bloodwood. 



Systematic. \ tall tree, with a pale-yellowish, laminated, tesselated hark, 

 quite unlike thai oi any other New Smith Wales species of Eucalyptus. Leaves 

 lanceolate, acuminate, occasionally falcate, from 4 to 6 inches long ; lateral 

 veins fine, numerous, parallel, slightly more oblique than those of E. corymbosa, 

 Sm. ; intramarginal vein quite close to the edge. Flowers in terminal panicles, 

 on slender pedicels. Calyx, hell-shaped, 2 to 3 lines long; ovary flat-topped; 

 operculum short, obtuse. 



Fruit.— Urn-shaped, not constricted below the rim, 

 which is countersunk ; 3 to 4 lines long, 

 and 3 lines in diameter. 



They an somewhat similar in shape to those of E. 

 tesselaris, F.v.M., but smaller, and with a sharper edge 

 to the rim. 



Habitat. — Murrumbo, Narrabri, New South Wales; Queens- 

 land. 



REMARKS. — This tree is very easy of determination in the field by its yellow tesselated friable bark, stained 

 in places by its freely exuding kino. It is rather limited in Us distribution in New South Wales, where it was first 

 recorded from Murrumbo. on the Goulburn River (R.T.B.), and at Narrabri. Both timber and bark somewhat 

 resemble those of E. eximia, F.v.M., a coast " Bloodwood," the former being pale coloured, hard, and very durable. 

 It is very foliaceous, although the leaves are rather small for so large a tree. Grows on sandstone country. 



ESSENTIAL OIL. — Leaves and terminal branchlets for distillation were 

 obtained from Murrumbo, N.S.W., in October, 1900. The yield of oil was 

 0-2 per cent. The crude oil was reddish in colour, and had an odour indicating 

 turpentine at first, with a secondary one somewhat resembling cinnamon. The 

 principal constituents in this oil were dextro-rotatory pinene and the sesquiter- 

 pene ; the aldehyde aromadendral was also present, and this was indicated by the 

 lsvo-rotation of the fourth fraction. It was also extracted by sodium bisulphite 

 from the third fraction, and its presence thus confirmed. Phellandrene was not 

 found in this oil, and only a trace of cineol could be detected. 



The crude oil had a specific gravity at 15 C. = 0-8929; optical rotation 

 a D -f 9-8°; refractive index at 20 — 1-4844, and was not soluble in 10 volumes 

 80 per cent, alcohol. 



On rectification a lew drops of acid water with some aldehydes came over 

 below 162' (com). Between 162-172 , 44 per cent, distilled; between 172-183 , 

 16 per cent, came over' between 183-244 5 per cent, distilled, and between 

 244 -278 , 31 per cent, distilled. These fractions gave the following :--- 

 First fraction, sp. gr. at 15 C. = 0-8616; rotation a B + 9-5°. 

 Second ., „ ',, '= 0-8668; ,, + 5-7°. 



Fourth ,. ,, .. = 0-9401; ,, - 0-4°. 



The saponification number for the esters and free acid was 3*13. 



