ClipArt ETC
"Showing at f the felty body covering the passage way through the exodermis of the aerial root of Sobralia macrantha." -Stevens, 1916

S. Macrantha Aerial Root

"Showing at f the felty body covering the passage way through the exodermis of the aerial root of Sobralia…

"Portion of cross section through an aerial root of Stanhopea oculata. h, the velamen; i, exodermis; j, cortex; k, endodermis." -Stevens, 1916

S. Oculata Aerial Root

"Portion of cross section through an aerial root of Stanhopea oculata. h, the velamen; i, exodermis;…