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(Anarcharis, or Elodea, Canadensis.) See Anacharis. -- Horned pondweed, the Zannichellia palustris, a slender, branching aquatic plant, having pointed nutlets.

ides) with crowded opposite fleshy leaves. -- Water purslane, an aquatic plant (Ludwiqia palustris) but slightly resembling purslane.

genus Panorpa. See Panorpid. -- Scorpion grass (Bot.), a plant of the genus Myosotis. M. palustris is the forget-me-not. -- Sorpion senna (Bot.), a yellow-flowered leguminous shrub (Coronilla Emerus) having a slender joined pod, like a scorpion's tail. The leaves are said to yield a dye like indigo, and to be used so…

given to several kinds of oak which grow in swampy places, as swamp Spanish oak (Quercus palustris), swamp white oak (Q. bicolor), swamp post oak (Q. lyrata). -- Swamp ore (Min.), big ore; limonite. -- Swamp partridge (Zoöl.), any one of several Australian game birds of the genera Synoicus and Excalfatoria, allied t…

A belemnite, or thunderstone. Thunderbolt beetle (Zoöl.), a long-horned beetle (Arhopalus fulminans) whose larva bores in the trunk of oak and chestnut trees. It is brownish and bluish-black, with W-shaped whitish or silvery markings on the elytra.

An aroid herb (Calla palustris) having a white spathe. It is an inhabitant of the north temperate zone.

The water violet (Hottonia palustris); also, the less showy American plant H. inflata.

iatus) are the best known. The most common American water shrew, or marsh shrew (Neosorex palustris), is rarely seen, owing to its nocturnal habits.

nerally durable timber. Among the most common are valuable species are Pinus mitis and P. palustris of the Eastern and Southern States, and P. ponderosa and P. Arizonica of the Rocky Mountains and Pacific States. -- Yellow plover (Zoöl.), the golden plover. -- Yellow precipitate (Med. Chem.), an oxide of mercury whic…