151 



15S. E. fereticomis Sm. " Tall, smooth-barked trees, 40 to 100 feet high, 1-3 

 feet in diameter, fruits mostly small. (W. F. Blakely and D. W. C. Shiress, Upper 

 Clarence River, N.S.W.) 



254. E. tetrodonta F.v.M. " Messmate " or " Stringybark." " A tree of 20 

 to 65 feet, but usually about 40 feet high, attaining a diameter of 20 inches.*' (C. A. 

 Gardner, Kimberleys.) 



27. E. umbra. Flowering and fruiting less than 6 feet high. (Top of Kariong, 

 north of Hawkesbury River, Blakely and Shiress.) 



68. E. uncinata. A Mallee, stems numerous, clustered, dense, 8-12 feet high, 

 slender. Bark decorticating in thick brown flakes, leaving the trunk greenish brown, 

 Ten miles north of Wagin (C. A. Gardner, No. 1910). A Mallee of 6-10 feet, with a 

 moderately rough bark, and stems of 2-3 inches diameter. Of spreading habit. 

 Esperance (C. A. Gardner, No. 2212). 



175. E. Websteriana Maiden. " Mallee habit of growth. Grows to a height 

 of 6-7 feet and stem 2-3 inches diameter at Mount Jackson." (Fitzgerald Fraser, 

 through W. C. Grasby.) " Not very large, more like large shrubs, of a gnarled and 

 stunted appearance. The highest specimen I have seen is under 20 feet, with diameter 

 of trunk about 8 inches." (R. J. Larsen, of Lake Lefroy.) 



Barks. 



(See also " Tannin " and " Oil in Bark," Part LII, p. 101. Also under E. Herbertiana 



and E. Macatihuri, M. B. Welch, p. 157, below.) 



" The development of the periderm keeps pace with the development of the stem. As soon as the 

 wood of the stem becomes thicker, by the intercalation of a new annual ring, the mantle of periderm 

 stretches, and consequently the whole envelope of bark. In many trees this bark remains year after year 

 on the periphery of the stem ; it becomes fissured by the continued increase in thickness, but new bark 

 is as continuously produced from within, closing up the fissures. In other instances a part of the bark falls 

 off on the ground in consequence of the thickening of the stem, and is again replaced by new bark from 

 within." (Kerner & Oliver, i, 719.) 



Compare Oldfield's remarks quoted at p. 51, Part LI. 



" The fall of the leaf may be looked upon, so far, as an excretion of superfluous 

 matter, which, in deciduous plants, occurs only once every year, but is then carried out 

 on a grand scale." (Kerner, i, 486.) This is analogous to the fall of the bark in 

 Eucalyptus, which often falls in enormous quantities, carrying spent materials with it. 



,: Your chapters dealing with barks are very interesting and instructive, but the differentiation 

 seeni3 a hopeless task. I think soil, as well as climatic conditions, affect and cause variations in the bark 

 in some species at least. I have noticed that, on very poor sandy soils, the outer " rough " bark persists, 

 or is ' thicker ' to a much greater extent on otherwise ' smooth ' or ' half-barked ' species than on the 

 richer soils; particularly have I noticed this in the case of E. viminalis and E. radiata." (H. Hopkins.) 

 " 839S9— F 



