CoRNACEAE. 265 
Nyssa. Tupelo. 
(Family Cornaceae). 
Trees: deciduous. Twigs mod- 
erate or rather stout, terete: pith 
moderate, white, rounded, continu- 
ous, but with firmer diaphragms 
at intervals. Buds moderate, ses- 
sile or slightly stalked and super- 
posed or solitary, ovoid, with 
about 4 exposed scales, the end- 
bud somewhat larger. Leaf-scars 
‘ alternate, broadly crescent-shaped 
or deltoid, sometimes becoming 
broadly U-shaped by rupture of 
an articular membrane, low: bun- 
dle-traces 3: stipule-scars lacking. 
Winter-character references:— 
Nyssa sylvatica (N. multiflora). 
Blakeslee & Jarvis, 331, 554, pl.; 
Brendel, pl. 3; Otis, 208; Schnei- 
der, f. 45, 124. 
The firmer cross-plates in the 
pith of Nyssa afford a _ ready 
means of identification in the summer when the alternate sim- 
ple leaves are the only obvious characters in evidence, as is 
true of staminate trees when out of flower, or pistiliate trees 
when without flowers or fruit. 
Nyssa uniflora, growing in deep swamps, is particularly 
characterized by the enormously swollen base of its trunk,— 
well figured by S. M. Coulter in the Report of the Missouri 
Botanical Garden, vol. 15, pl. 18, 19. 
1. Twigs densely velvety. (Ogeeche lime). (1). N. capitata. 
Twigs and buds glabrescent or glabrous. 2. 
2. Buds depressed. (Cotton gum). (2). N. uniflora. 
Buds ovoid. (Pepperidge). (3). N. sylvatica. 
