ANALYTICAL KEY. li 



Leaf-sheathB split open opposite the blade. A palea to 



each flower within the glume aBAMlNEjE, p. 403. 



Flowers solitary or crowded, without bracts, or the scale- 

 like bracts not longer than the ovary. 

 Aquatic plant. Anthers or ovaries singly sessile in 



the axils of the leaves Naias, p. 345. 



Terrestrial plants. Stamens, ovaries, or sessile flowers 



crowded on a spadix with a spatha at the base . . Aboii>e.», p. 341. 

 Ferianth inferior, longer than, {he ova/ry. 

 Pistil apocarpous (ovaries distinct). Perianth regular, of 



8 sepals and 3 petals Saotttaeia, p. 346. 



PiatU synearpous (ovary 3-celled or rarely 1-eelled). 

 Flowers closely packed in terminal compact heads, with 

 imbricated scales. 



Flowers hermaphrodite, yellow Xtbis, p. 379. 



Flowers unisexual, very small. Perianth scarious 



and transparent Eeiocauloit, p. 381. 



Flowers solitary, or in spikes, racemes, or panicles. 

 Perianth petal-like, of 6 lobes or segments. 

 Aquatic plants. Flowers appearing to. proceed 



from the side of the petiole MoiroOHOBiA, p. 374. 



Terrestrial plants. Flowers axillary or terminal . L1LIACE.S;, p. 368. 

 Perianth double, the outer herbaceous, the inner 

 very dehcate and petal-like. 

 Leaves radical, liuear. Inner perianth-segments 



rolled in at the edges Tstsanotus, p. 372. 



Leaves with sheathing petioles. Petals not rolled in Commelyn ACEJE, p. 375. 



Perianth of 2 petal-like segments Philtdbttm, p. 379. 



Perianth of 6 small dry stiff segments JtTNCTJS, p. 380. 



Ferianth superior. 



Perianth very irregular. 



Anthers 1 or 5, on subulate or petal-like filaments. 



Leaf-veins pinnate Soitamine^, p. 347. 



Anthers 1 or rarely 2, sessile, on a central column or 



style. Leaf-veins simple . . . .... Ohohide^, p. 849. 



Perianth regular or nearly so. 

 Flowers unisexual. 



Aquatic plant. Stamens 8 or 9. Female perianth 



with a long tube Blyxa, p. 347. 



Terrestrial twiners. Stamens 6. No tube to the 



perianth DioscoBBA, p. 867. 



Flowers hermaphrodite. 



Stamens 6 Amabtmidb^, p. 865. 



Stamens 3. 

 Perianth tubular. Small, slender, leafless plant . Q-ontanthbb, p. 364. 

 Perianth of 6 spreading segments. Leaves equi- 

 tant Paedanthus, p. 365. 



CLASS III. CEYPTOGAMS. 

 (See p. 435.) 



