20 CONSERVATIVE LUMBERING AT SEWANEE, TENN. 



measured was 28 inches in diameter. Seed is borne about every three 

 years. Reproduction is very scant. Light is essential to the develop- 

 ment of the seedlings. Only a light fire is required to burn a hole in 

 Cucumber-tree, and rot soon follows. 



Umbrella-tree is not distinguished from Cucumber-tree at Sewanee, 

 where the two associate. Umbrella-tree is considered a young or 

 stunted Cucumber-tree, for it never approaches mature specimens of 

 the latter species in size or form. The largest measured Umbrella- 

 tree was 11 inches in diameter. There is no reproduction. 



Tulip-tree is the most valuable of the species that grow commonly 

 in the Sewanee forest. TV hen at its best, in dense forest and good 

 soil, it forms a long, clear trunk and a narrow crown. It seldom 

 occurs in very damp soil, where it is always unsound and of poor size. 

 It is confined to Northerly Slope and Hickory Slope. There is prac- 

 tically no reproduction of Tulip-tree, although it seeds plentifully every 

 year. Very few of the seeds germinate. The only reproduction of 

 importance that was observed had taken place on abandoned fields 

 where the seeds had found broken ground to sprout in and the seed- 

 lings had received plenty of light. Throughout its life Tulip-tree is 

 most intolerant of shade. It is very susceptible to fire at all ages, and 

 charred trees are likely to be hollow. Cattle are very fond of the 

 seedlings. 



I'd pan- is confined to rich, moist soil along creeks through Lower 

 Slope. Only a few scattered trees were observed, the largest of which 

 measured inches in diameter. Thickets of seedlings grew in deep 

 shade near these trees. 



Sassafras forms a large part of the undergrowth on the upper 

 benches, below which it is plentiful on south slopes. It grows only in 

 the best places, and reaches a diameter of 17 inches. On the plateau 

 it is scarce, and seldom becomes more than a bush. Sassafras bears 

 fruit only occasionally. It seems to thrive equally well in the open or 

 in deep shade. If suddenly exposed to sunlight, however, it dies 

 immediately. 



Witch Hazt 1 occurs above the creeks on the plateau and in the coves. 

 It is not plentiful, and is always small. 



Swt • t Lin m is common in the valleys, but is found at Sewanee only 

 on the plateau, where it occurs in groups of three or four in wet Bot- 

 tom. All the specimens seen were old trees, the largest measuring 

 22 inches in diameter. Sweet Gum usually has a short bole and a 

 large, low crown. 



Sycamon g-rows in moist, rich soil. Few trees of the species are to 

 be found on The University Domain. The largest of .these are in the 

 coves, near springs, but a few grow near pools on the plateau. A 

 group of Sycamore saplings, far from any large trees of the species, 

 was the only reproduction observed. 



