THE PLANT-BODY. 67 
(d) Study as examples of phyllome forms: 1, hairs of petunia or 
verbena; 2, bristles of tickle-grass; 3, prickles of'the hop; 4, scales 
of the buffalo-berry, or eleagnus; 5, glands of the petunia or walnut; 
6, root-hairs of seedling cabbages, radishes, etc. ; 7, sporangia of com- 
mon polypody fern; 8, ovules of anemone, buttercup, columbine, 
bouncing-bet, etc. 
(2) Study for root-forms: 1, roots of seedling cabbages, radishes, 
etc.; 2, aerial roots of greenhouse orchids; 3, parasitic roots of 
dodder or mistletoe. 
