-roup of Eucalypts. Peduncles axillary, aboul 5 lines long, terete or slightlj 

 1l.1t tened, with five to sever flowers in the umbel. Calyx hemispherical; oper 

 culum hemispherical, shortlj acuminate, 3 lines in diameter. 



u?.a 



Fruit. Mighl be described as hemispherical or 

 pilulai . bul 1 ontra< ted al the rim, whit h is 

 either countersunk or flat ; 3 to 4 lines in 

 diameter. 



These iir, n ' ' tricta 



Habitat. Berrima, Mittagong, New South Wales. 



REMARKS. 1 ■ n material, hi luch tl sn-l,., 



that it was considered bj us at first, and without an; hi i i i a identical with thai pecies The differeno 



however, in the constituent oi theii re pectivi oil difference uch a could not be I u< to soil or climate 



cause 1 us to make i ■' ■ harai ters, such as the oil constituents seemed to indii 



The presence ot thi mint constituent in thi | also led us to look Eoi a venation imilai to thai ot 



/.;. dives, ilar p opi rt; and such was foun l when the cuticle oi the 



was remnvf 1 Bj a similai I i ttment thi teat ot I was found to havi a venation corresponds 



E. Bridgesiana, R.T.B., and othi of the richer cineol-yieldini Eucalypts ft is, therefore, upon 

 ol these characters and oil constituents that ti i pecii / tricta Sieb., and E. apiculata, are separated 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained from Berrima, N.S.W., in May, 1899. The yield of oil was 07 per cent. 

 Tin' crude oil was of a light orange-brown colour, and had a strong peppermint-like 

 odour. Only a small .'mount of cineol could be detected. Pinene was present, 

 but phellandrene was absent. The peppermint constituent was present in some 

 quantity, and 18 per cent, came over between 228 240 C. 



Thi crude oil had specific gravity at 15 C. = 0-9112; rotation. « D - 7-8°; 

 refractive index at 20 = 1*4877 ; and was soluble in 1 volume 80 per cent, alcohol. 

 The saponification number for the esters and free acid was 8-7. 



On rectification, 2 per cent, distilled below 170 C. (corr.). Between 

 170-185 , 38 per cent, distilled ; between 185-228°, 37 per cent, came over, and 

 between 228 240 . 18 per cent, distilled. These fractions gave the following 

 results : — 



First fraction, sp. gr. at 15 C. = o-886i ; rotation a B + 4-3°. 



Second „ ,. ., =0-9045; „ -f 1-5°. 



Third ,. ,, ,. = 0-9420; „ 4- 4-4 . 



It will be noticed thai the three fractions were all dextro-rotatory, but that 

 the crude oil was laevo-rotatory. The reason for this peculiarity was the altera- 

 tion which takes place in the optical activity of the piperitone when submitted 

 tn direct distillation. 



Material of this species for distillation was also obtained from Berrima, 

 X.S.W., in September, iX<)<), in order to test the constancy of constituents. The 

 oil was found to be practically identical with that of the previous consignment, 

 the constituents were similar, and present in aboul the same amounts. The 

 specific gravity of the crude oil was 0-9056, ;yn<\ the optical rotation a s 8-4°. 

 I he crude oil formed a clear solution with 1 volume 80 per cent, alcohol. 



Material of this species was also obtained for distillation from Mittagong, 

 N.S.W., in July, 1901. The oil was in agreement with those of the material from 

 Berrima. A portion of this oil was acetylated in order to determine if alcohols 



