420 LYTHRACEAE 
Ovary completely free or only partly inferior. 
Anthers opening by a longitudinal split MELASTOMACEAE 
Anthers opening by a pore at the summit LYTHRACEAE 
Ovaries inferior to the calyx, the calyx adhering to it. 
Water plants with finely divided leaves HALORAGIDACEAE 
Water plants with broad floating leaves . .TRAPACEAE 
Land plants or marsh plants . . . . ONAGRACEAE 
Famity I.—LYTHRACEAE. Loosrestrire FAmMILy 
Tn our region all herbs except Decodon. Leaves opposite, except 
in Lythrum. Flowers regular or somewhat irregular. Ovary free 
or more or less adherent to the calyx, 2- to several-celled. 
Stipules none. Calyx of 4 or more lobes. Petals as many as 
the principal lobes of the calyx, but sometimes absent. Anthers 
attached to the filament of the stamen near the middle and open- 
ing longitudinally. 
Flowers regular. 
Flowers Jarge, many .- 4 «.). 2 « % o QDGgae 
Flowers small, few. 
Capsule bursting at the partitions between the cells 
Ae a en a ee ee S\N 
Capsules bursting irregularly . . . . Ammannia 
Calyx cylindric 0% cee toe Bie ee eee 
‘Calyx tubular, swollen below . . . . . Cuphea 
1. AMMANNIA, L. 
Our plant an herb, 2 to 6 in. high, with opposite leaves, in the axils 
of which are 1 to 3 inconspicuous flowers with bell-shaped calyx and 4 
small purple petals which fall early. Stamens 4. Low herbs of no special 
beauty. ‘ 
l. A. Koehnei, Britton. Kornnre’s AMMANNIA. Plant, rather more 
than 1 ft. high, sometimes less; smooth. Leaves mostly lanee- or spatula- 
shaped, with blunt extremities, the base of the upper ones clasping with 
ear-like lobes at base. Flowers 1 to 3 in each upper axil, quite incon- 
spicuous. In Hackensack marshes, New Jersey, and south. flowers all 
summer, 
2. A. coccinea, Rottb. LonG-teavep AMMANNTIA. Leaves sharp- 
pointed at extremity, narrow lance-shaped. Swamps and muddy banks. 
New Jersey, and southward. July-Sept. 
2, ROTALA,. L. 
Low inconspicuous herb, with opposite leaves and small axillary 
flowers, generally solitary. Calyx 4-lobed with as many accessory teeth 
between the lobes. 
