GERMINATION OF TREES AND SHRUBS 



305 



ness, longitudinal marking's. Resinous bodies nearly sessile, sev- 

 eral cells, 5-7, some slightly stalked. ^ 

 Cari/a glabra (]\Iill) Spach. Pignut. South Carolina, Decem- 

 ber 7, 1917, wintered in the greenhouse, g'erminated March 28, 

 1918, stem smoothisih, reddish, sliglitly pubescent ; with resinous 

 globules. First, second and third leaves each with thin leariets, 

 terminal leaf largest, petioles and stalklets of leaf slightly pubes- 

 cent. Margins sei-rate, lower and upper surfaces of thi leaf with 



Fig-. 56 

 Fig. 54 

 Fig. 54. — Seedling- of Cart/a glohrci, sliowing early scales in stem. a, 

 tiichimes from stem ; b, trichomas from leaf. Drawn by C. M. King. 



Fig. 55. — Carya (jiabra. Group 1, trichomes from stem of seedling. Group 

 2. resinous glands, side and top views. Drawn by C. M. King. 



Fig. 56. — Germinating nut of Carya cordiforinis. showing radicle and 

 young stem. Drawn by C. M. King. 



resinous globules. Trichomes occurring singly, straight or 

 slightly curved, l-celled, with enlarged bulblike base. Tip curved, 

 orooklike, or straight, walls with longitudinal roughening. Res- 

 inous glands freely present on stem and leav:"* o*-" the young 

 plant, consist of a glandular structure of about four cells, with 

 short stalk. 



Carya cordiformis (AVang) K, Koch. Bitternut. Seed planted 

 in greenhouse in fall of 1917, seedling described May 7, 1918. 

 ^'alvesl of shell spread slightly at the apex, germination hyjioisrae- 

 ous, hypocotyl appears first, at its l>ase the oaulicle develops. 

 Stem and young leaves reddish. First leaves scalelike, stem 

 20 ' 



