LIST OF ILLUSTRATIONS xvii 



FIG- PAGE 



332. Orchis maseula : the two pollinia (after Darwin) . 402 



333. Ophrys apifera (after Bentham) . . 408 



334. Gephalanihera grandiflora (after Bentham) . 410 

 335,336. Gypripedium Gakeolus : iroat and siie views oi S.OWSV . 413 



337. Iris Pseud-acorus, showing relation of petal, stamen, and 



stigma . . ... 415 



338. Allium sphmrocephalum (after Bentham) . 421 



339. Seed of Narthecium . 422 



340. Pistil of Colchicum autmnnale (after Grenier and Godron) 425 



341. Flower of Juncus articulatus (after Grenier and Godron) 426 



342. 343. Male and female flowers of Sedge {Garex acuta) . 430 



344. Garex paludosa : vertical section through part of a leaf, 



showing protection of stomata from moisture hy papilla-like 



outgrowths of the surface (after Kerner) . 430 



345. Diagram of a spikelet of Wheat dissected (from Ward after 



Oliver) . . 431 



346. Diagram of a spikelet of Anthoxanthum dissected (from 



Ward after Oliver) 432 



347. Leaf of Poa trivialis . 432 



348. Poa annua : transverse section of half of leaf, including the 



median keel, and showing the motor cells (after Ward) 433 



349. Nardus stricta : transverse section of leaf showing support- 



ing tissue and motor cells (after Ward) . 433 



350. Awned fruit of Stipa pennata 434 



351. Margin of leaf of Festuca set with barbs . 436 



352. Arrhenatheruni avenaceum : spikelets and anthers in various 



stages illustrating pollination (from Ward after Kerner) 440 



