268 33. Bistorta. 15. POLYGONEiE. Pl.ex.mon. 
2. Bistorta vivipara . Childing snakeweed . 
Leaves lanceolate, margin revolute ; spike linear ; flowers 
often gemmiparous. 
Bistorta minor, Raii Syn. 147, 2 ; Ger. em. 399, 2. 
Bistorta minor nostras, Park. 392. 
Polygonum viviparum, Lin. S. P. 516. 
Small bistort. Small snakeweed. 
Fields and pastures; perennial ; June and July. 
Stem 9 in. high; spike obtuse; flowers rosy; lower flowers 
bulbiferous. 
(3. alpina . Radical leaves roundish, minutely serrated. 
Bistorta minima Alpina, foliis imis subrotundis et minutissime serratis, 
Raii Syn. 147,3. 
Bistorta Alpina pumila varia, Park. 392. 
II. 34. PERSICARIA. Pliny. Peachwort. 
Perigonium 3 to 5-parted, persistent ; stamens 5 to 7 : 
filaments connected by a gland, 3 or 4 at the sinus of the 
lobes, the others opposite to the sides of the ovary; styles 2; 
stigmata 2, blunt ; ihecidium ovate, compressed ; corculum 
lateral ; cotyledons accumbent. — - Stem much branched ; 
ocrece 1 or 2-valved, 2 or 3-flowered ; flowers spiked ; spike 
terminal or axillary. 
1. Persicaria amphibia. Amphibious peachwort. 
Leaves lanceolate, acute, serrulate, bald, heartshape at 
bottom. 
Persicaria salicis folio perennis, potamogiton angustifolium dicta, Raii 
Syn. 14% 9. 
Potamogiton angustifolium, Ger. em. 821, 2. 
Fontalis major longifolia, Park. 1254, 1 a. 
Polygonum amphibium, Lin. S. P. 517. 
Narrow-leaved pondweed. 
Watery places ; perennial ; J uly and August. 
Stem floating ; stipules entire ; leaves pleasant green, 
glossy, edge aculeated ; flowers pedicelled ; stamens shorter 
than the lobes of the perigonium. 
<3. terrestris. Stem erect ; leaves dark, rough ; stamens 
longer than the lobes of the perigonium. 
2. Persicaria acris. Sharp peachwort . 
Stem upright; leaves bald, smooth, lanceolate, spotless; 
stipules fringed ; spikes filiform, drooping ; style cloven. 
