28 KEY AND FLORA 
1. C. virginica L. Virainra Dayriower. 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.* 
Il. 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. Wanperine 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. PONTEDERIACEZ. PickerReL-WEED FAMILY 
Perennial marsh or aquatic herbs, stems simple or branched, 
succulent. Leaves simple, alternate. Flowers 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-celled; 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. Radical 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; 
