GERMINATION OF TREES AND SHRUBS 



323 



miiiate. Grlands of manj^ cells tliin-walled, reddish. With re- 

 spect to epigffious and hypoggeous germination, the cotyledons of 

 this species barely push out oi the shell. . They are not visible 

 above the ground, or rarely so. The germination is, therefore, 

 intermediate between the true epigseous and hypoggeous seeds. 

 Germinating freely out doors by May 18. 



LEiGUMINOS^. 

 The germination of a considerable number of the Leguminosa; 

 have been described by Lubbock.-^ Of our trees he has described 



Fig. 9 4. — Seedling of Gleditsia triacanthos, showing radicle, cotyledons 

 and early leaves. Drawn by C. M. King. 



GleditscJim triacanthos-^ and Rohinia Pseud-Acacia.-^ Studies 

 on seed coats of Leguminosae, including Robinia, G-ymnocladus 

 and Gleditsia were made by Pammel.^^ Winkler has studied 



-'A ciontribution to our knowledge of seedlings, 1, p. 382. 

 "L. c. 1, p. 456. 

 -=L. C. 1, p. 422, /. 275. 



^^Anatomical characters of seeds of Lesuminosae : Trans. Acad. Sci., St. 

 Louis, 162, pp. 209-212. 



