• strict warning: Non-static method view::load() should not be called statically in /var/www/pia/drupal/sites/all/modules/views/views.module on line 906.
  • strict warning: Declaration of views_handler_argument::init() should be compatible with views_handler::init(&$view, $options) in /var/www/pia/drupal/sites/all/modules/views/handlers/views_handler_argument.inc on line 744.
  • strict warning: Declaration of views_handler_filter::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /var/www/pia/drupal/sites/all/modules/views/handlers/views_handler_filter.inc on line 607.
  • strict warning: Declaration of views_handler_filter::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /var/www/pia/drupal/sites/all/modules/views/handlers/views_handler_filter.inc on line 607.
  • strict warning: Declaration of views_handler_filter_boolean_operator::value_validate() should be compatible with views_handler_filter::value_validate($form, &$form_state) in /var/www/pia/drupal/sites/all/modules/views/handlers/views_handler_filter_boolean_operator.inc on line 159.
  • strict warning: Declaration of views_plugin_style_default::options() should be compatible with views_object::options() in /var/www/pia/drupal/sites/all/modules/views/plugins/views_plugin_style_default.inc on line 24.
  • strict warning: Declaration of views_plugin_row::options_validate() should be compatible with views_plugin::options_validate(&$form, &$form_state) in /var/www/pia/drupal/sites/all/modules/views/plugins/views_plugin_row.inc on line 134.
  • strict warning: Declaration of views_plugin_row::options_submit() should be compatible with views_plugin::options_submit(&$form, &$form_state) in /var/www/pia/drupal/sites/all/modules/views/plugins/views_plugin_row.inc on line 134.
figure

 

Figure 15.29 A schematic transverse section through part of an orchid root, showing specialised outer tissues. V, velamen; E, exodermis; C, cortex; A, a thin-walled aeration cell, empty and filled with air; P, a wedge of air-filled cells; PC, a living thin-walled passage cell surmounted by a fibrous body. A mature velamen is dead and filled with air, but acts like a sponge when wetted. A wedge of water-repellent cells (P) provides a path for gaseous diffusion (Based upon an original sketch by R. Sinclair)