28 KEY AND FLORA 



1. C. virginica L. Virginia Dayflower. Stem erect, downy, 

 1-2 ft. high. Leaves lanceolate to oblong-lanceolate, taper-pointed, 

 3-5 in. long, somewhat rough above ; sheaths inflated, hairy, the open- 

 ing often fringed. Spathes containing a slimy secretion. Flowers 

 1 in. wide, the odd petal lanceolate. Capsule 3-seeded, the dorsal 

 cell not splitting open. On moist, sandy soil.* 



III. ZEBRINA Schnizl. 



Trailing or slightly climbing herbs. Leaves often striped. 

 Flowers usually in pairs. Calyx with a short tube, regularly 

 or irregularly 3-parted. Corolla nearly actinomorphic, with 

 tube longer than the calyx. Filaments naked or bearded. 

 Ovary 3-celled, 3-6-ovuled. 



1. Z. pendula Schnizl. Wandering Jew. Stems perennial, pros- 

 trate or nearly so, branching freely, rooting easily at the nodes. 

 Leaves somewhat succulent, lance-ovate or oblong, crimson beneath, 

 green or dark purplish above, often with two wide silvery stripes. 

 Cultivated from Mexico. 



8. PONTEDERIACE^. Pickerel-Weed Family 



Perennial marsh or aquatic herbs, stems simple or branched, 

 succulent. Leaves simple, alternate. F'lowers solitary or 

 spiked, each subtended by a leaf-like spathe, perfect, mostly 

 not actinomorphic. Perianth corolla-like, 6-parted. Stamens 

 3 or 6, unequal, inserted irregularly in the tube or throat of 

 the perianth. Ovary superior, 1- or 3-cened ; style single ; 

 stigma entire or toothed. Fruit a 1-seeded utricle.* 



PONTEDERIA L. 



Stem erect, from a thick, creeping rootstock, bearing a 

 single leaf above the middle and several sheathing, bract-like 

 leaves at its base. Eadical leaves numerous, thick, parallel- 

 veined. Petiole long, from a sheathing base. Flowers in ter- 

 minal spikes. Perianth 2-lipped, lobes of the upper lip ovate, 

 of the lower oblong, spreading. Stamens 6, the 3 upper short 

 and often imperfect, the 3 lower protruding. Ovary 3-celled, 



