GERMINATION OF TREES AND SHRUBS 
79 
greenhouse Nov. 12, 1918; germinated April 1, 1919; second 
seedling appeared April 20. 
Hypocotyl three to six inches in length. Cotyledons thick, 
fleshy, elliptical. Stem glaucous, smooth. First leaf simple, pin- 
nately veined, smooth, spotted, paler underneath; stipules small, 
slender, obtuse-pointed ; petiole short. Second leaf pinnately com- 
pound, odd pinnate, with mucro in place of leaf ; petiole short ; 
stipule small, pointed ; leaflets entire, elliptical, mucronate. Third 
leaf abruptly pinnate; leaflets smooth, a few scattered hairs on 
veins and margins of the leaflets. Rachis channeled, with mucro. 
Young leaves slightly sensitive. 
Geraniales 
Rutaceae 
Ptelea trifoliate L. Hoptree. See figure 11, B. 
Seeds collected fall, 1918; stratified out of doors; planted in 
greenhouse, March 8, 1919; germinated May 2, 1919. 
Hypocotyl finely pubescent. Cotyledons oblong, obtuse, shortly 
petiolate, at ends minutely crenulate; deep green; glabrous. 
Umbeeales 
Cornaceae 
Nyssa sylvatica Marsh. Black gum. See figure 11, C. 
From Camp Gordon, Georgia. Seeds collected fall of 1918; 
stratified out of doors; planted in greenhouse, March 8, 1919. 
germinated May 1, 1919. 
Germination epigaeous. Hypocotyl slender, reddish green. 
Cotyledons fleshy, oblong-ovate, short petioled, green above, paler 
beneath, smooth, margin entire. Size of cotyledon, one inch in 
length, one-third inch in width. Stem above cotyledon slightly 
hairy. First leaf hairy above, smooth below, hairy on margin. 
In general aspect resembling dogwood. 
Ebenales 
Sapotaceae 
Diospyros virginiana L. Persimmon. See figure 11, D. 
Seeds collected near Kansas City, fall of 1918; planted Nov. 12, 
1918, in greenhouse; germinated March 25, 1919, 95 per cent. 
Seeds collected near Clemson, South Carolina, fall of 1918; 
stratified out of doors; planted iru greenhouse, March 8, 1919. 
Germinated March 28, 1919, 95 per cent. 
Hypocotyl when first appearing, arched, bringing the seed up 
with it, as it straightens. The cotyledons gradually emerge as 
the seed coat is thrown off. Growth of seedling rapid, hypocotyl 
