685 NOTES ON THE NATIVE FLORA OF NEW SOUTH WALES. By R. H. Cambage Part i. — The Tumbarumba and Tumut Districts. These notes were taken in March, 1903, when the effects of the drought were to be seen on every side, consequently only the conspicuous members of the flora were noticed. Perhaps the chief feature brought out in this paper is the regulating influence which elevation exercises over the vegetation. Starting from Wagga Wagga, at an altitude of about 600 feet above sea-level, an ascent is made through Tumbarumba to Laurel Hill, where the height is about 3,300 feet. During this ascent, the flora changes absolutely, scarcely a plant being found at the latter place, which is also common to the low land. After travelling northerly for about 25 miles from Tumbarumba, a descent is made to Tumut (900 feet), which is reached at about 40 miles, and in this descent, and also that continued to Gundagai (750 feet), a return is made to the same warm-country flora as that of similar levels to the south-west. Probably the tree which most definitely marks the dividing line between the warmer-and colder-country floras is the White Box, Eucalyptus heniiphloia var. alhens^ Miq., the upper margin of its habitat, when met with in a descent from the mountains, being an undoubted sign of an approaching warmer temperature, and in a given latitude the presence or absence of this tree on the western slopes at once supplies the observer with an approxi-mate idea of the elevation. In following this species northerly a splendid example is seen of the warmer effects of northern lati-45
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