Nyssa 



(121 ) 



Oak Galls 



fulva, bright red. 

 gladstoniana, wh. 

 gloriosa, bright red, ro. 

 .Tas. Brydpn, ro. criin. 

 L;iy<lokeri fulgens, amar- 

 anth. 



liliaoea, lil., car. 



purpurata, pk., crim. 



rosea, pk. 

 lucida, pk. 

 iii'irHact'ii albida, wh. 



camea, pk. 



chromatella, yel. , Ivs. 

 (leg p. 119) marbled br. 



flammea, red. 

 Tender Hybrids : 



boucheaua, ro. 

 daubenyana, bl. 

 draniaiia, ro. pk. 

 Eugenie, car. ro. 

 Tul'iiee, wh., pk. 

 keweusis, ro. red. 



ignea, pur. red. 



rosea, pk. (see p. 120). 

 rubro-puuctata, pale 



red. 

 odorata exquisita, pk. 



rosacea, pale pk. 



sulphurea, yel. 



sulplmrea grandiflora, 

 yel. 



robinsouiana, vermilion, 



yel. 



sangumea, red. 

 Seiguoureti, yel., pk., red. 

 Win. Doogue, red. 

 \Vm. Falcouer, red. 



Mrs. C. W. Ward, ro. pk. 

 o'marana, ro. red. 

 pulcherrima, light bl. 

 smithiana, pk. 

 Sturtevautii, ro. red. 

 Win. Stone, bl. 



NYSSA. (TUPELO TREE.) 



Hardy trees and shrubs (ord. Cornacere), pro- 

 ducing small greenish white flowers. Though not 

 01 much value fur their (lowers, they should be 

 iiifluded in all shrubberies of any size, for the 

 great beauty of their autumnal tints. In this 

 respect few plants can vie with them, for the 

 colours range from vivid green to fiery scarlet, and 

 the leaves remain in this condition for some time. 

 Propagation, by seeds and layers. Plants seldom 

 produce fertile seed in England. Soil, loam and 

 sandy peat. A moist situation is best, as Nyssas 

 are naturally swamp-loving trees, 



Principal Species : 



aquatica, SO" to 50", Ap., 



My., wh. 

 capitata, solitary Ivs. 



large, hairy. Ogechee 



Lime 



sylvatica, 30' to 40'. 

 flowers iii pairs (syn- 

 multiflora). 

 tomentosa (see aquatica). 



candicans), uniflora (sen aquatica). 



OAK. 



A popular name applied to the large genus 

 Quercus. The common Oaks are of much value as 

 timber trees, and for landscape effects, imparting 

 an almost unique appearance to the country. 

 Most of them are too large for ordinary garden 

 purposes, and must be relegated to the park and 

 forest, but the varietal forms and some of the 

 ornamental, exotic species, such as the Holm Oak, 

 Quercus Ilex ; the Mossy or Prickly Cupped Oak, 

 Q. -flSgilops ; the Chestnut-leaved Oak, Q. casta- 

 nesefolia ; the Turkey Oak, Q. Cerris, and its cut- 

 leaved form laciniata ; the Red Oak, Q. rubra ; 

 and the Cork Oak, Q. Suber, should find a place 

 in all extensive gardens. (For species and varie- 

 ties, see QUERCUS.) 



OAK CALLS. 



Oak Galls, or Oak Apples as they are more 

 popularly designated, are the result of a special 

 effort on the part of the trees that bear them to 

 cover up an injury. The injury is a puncture made 

 by the sharp ovipositors of certain Gall Flies (Cynip- 

 idae) ; this puncture is made by the female, and 

 in it eggs are laid which soon develop into grubs. 

 The irritation set up gives a wonderful stimulus to 

 the formation of plant tissue, and more wonderful 

 even than this is the fact that the growth forms 

 galls varying in form and size in such a way that 

 it is possible to determine the species of fly that 

 made the puncture, by an examination of the gall. 

 The insects emerge at various times, but it may 

 be taken as a general rule that the sexual forms 

 emerge from the summer galls about June or July. 

 Fortunately the galls do not seriously distress Oak 

 trees, and it is not often necessary to take preven- 

 tive measures. Plucking and burning the fresh and 

 unhardened galls would, of course, materially 

 reduce subsequent attacks. Owing to the presence 



Photo : C. R. Hick. 



ODORATA (see f. 120). 



