GERMINATION OF SHRUBS AND TREES 
263 
Fig. 9. Seedlings of Gleditsia aquatica 
Photo by B. H. Richardson 
house. May 1 the large cotyledons appeared above the soil, fol- 
lowed by strong rapid growth of the young plant. 
Germination epigaeous. Cotyledons fleshy, elliptical, sessile; at 
first yellowish becoming bright green above, paler beneath; stem 
below the cotyledons smooth, whitish. 
Cotyledons lifted out of the soil in position parallel to the stem, 
base first. Leaves alternate, leaflets at first appressed. Leaves 
pinnately compound, leaflets oval, about seventeen in number. 
Rhamnus calif ornica. Eschscholtz. California Buckthorn. 
Seeds obtained by L. H. Pammel, at Yosemite Park, California. 
Seeds scratched and planted in greenhouse January 16, 1922. 
Germinated February 25, 1922. 
Germination hypogaeous. Young stem reddish below, slightly 
