WHITE OR WHITISH FLOWERS 
Water Arum (Calla palustris). Anim family. May, June. 
An attractive perennial under a foot high with small green 
flowers, on a spadix (one inch) surmounted by a large white 
spathe. The lower flowers are perfect, the upper sometimes 
staminate. Leaves broadly heart-shaped, long-stalked. Bogs. 
Seven-angled Pipewort {Eriocaulon artiadatum) . Pipe- 
wort family. July to October. 
Delicate stems, four- to seven-angled, bearing minute flowers 
in small heads, some with stamens, others pistils (monoecious). 
The parts of the flower have been variously classed; following 
Gray there are two or three sepals, and the corolla of the stami- 
nate flower is two- or three-lob ed. The pistillate flower has two 
or three narrow petals and the sepals are so remote as to suggest 
rather bracts. In the centre of each corolla-lobe is a dark spot. 
Leaves, one-half to three inches long, are narrow, parallel-veined. 
Quiet water. Generic name signifies woolly stalk. 
Floating Heart ( Nymphoides lacunosum) . Gentian family. 
July, August. 
A perennial with leaves floating or under water. Small, 
regular, polygamous flowers, one-fourth to one-half inch broad, 
in umbel with a cluster of tubers. Corolla five-parted. What 
appears to be a long stem is really a runner from the primary 
root-stalk. Shallow water. 
Twinleaf (Jeffersonia diphylla). Barberry family. April, 
May. 
Perennials with stems under a foot high, and long delicate 
leaf-stalks. The soHtary flower (one inch) has eight petals and 
four quickly falling sepals. The leaves (six inches long or under) 
are divided into two leaflets. Named for Thomas Jefferson. 
128 
