Plants with Vaguely Oval (or Triangluar), Entire Leaves in Ponds, in New Jersey

I am not an expert. This is what I've learned so far:

Roughly from larger to smaller:

-Arrow arum, Peltandra virginica, has triangular leaves with main veins along the middle to each point of the triangle.
-Broad leaved arrowhead (Sagittaria latifolia) has curving parallel veins in three bunches, aiming toward each point but without a much larger central vein (as in arrow arum)
-Pickerelweed (Pontederia cordata) has veins almost not visible and lower lobes much smaller than in either of the above. It also nearly always has flowers all summer.
-Water-plantain (Alisma sp.) has leaves nearly oval, or with slight bottom lobes, one central vein and fine veins mostly straight from central. A. subcordatum has smaller flowers and fruit than A. triviale but generally you will not be able to separate the two in the field. A. subcordatum is more common here.
-Skunk cabbage (Symplocarpus foetidus) generally grows in mud rather than water and has much larger leaves, in clusters, with heart-shaped bases and secondary veins curving to follow the shape of the leaf.
-Spatterdock (Nuphar advena) also holds its large leaves above the water as in those above, they are larger in spatterdock and somewhat rounder, with the veins at nearly a 90-degree angle to the midvein of the leaf, over nearly the whole surface.
-A "spatterdock" with leaves all floating and the bottom lobes (at the notch) overlapping one another is variegated pond-lily (Nuphar variegata).
-American lotus (Nelumbo lutea) is rare but present in the area, has the largest leaves of all, holds them out of the water. They are entirely round (no notch) with the stem right in the center as an umbrella. Pale yellow flowers. Same thing with pink flowers is the planted sacred lotus (Nelumbo lucifera).

All of which have larger leaves than the following:

-Fragrant white waterlily (Nymphaea odorata) has floating basically round leaves with a notch, much like "Pac-man".
-Wild Calla (Calla palustris) has round leaves with a notch and a definite point, about 4 inches across, held above the water, with not very obvious veins that diverge from the midvein and curve to follow the edge of the leaf, a lot like a small and rounder pickerelweed.
-Common Water-hyacinth (Pontederia crassipes) has kidney shaped leaves with veins very curved and following the edges of the leaves, held out of the water, with a huge, swollen node in the leaf stem right at water level. This is not that.
-Kidney leaved mud-plantain (Heteranthera reniformis) has kidney shaped leaves somewhat above water level, only up to 3 inches across (if that) with wide stems but no swollen nodes. The leaves are often wider than long and the notch between the basal lobes is fairly wide and U-shaped.
-Little floatingheart (Nymphoides cordata) has 2-inch, heartshaped leaves, usually with a pointed tip and a fairly wide v-shaped notch. The not very prominent veins seem to spread in every direction from the point where the stem is attached.
-European frogbit (Hydrocharis morsus-ranae) is usually not found in NJ, has round, heart-shaped leaves, with a very narrow notch, about 2-inces and floating..
-American frogbit (Limnobium spongia) is also not usually found in NJ, and has pointed heart-shaped, floating leaves about 2 inches wide and generally longer than wide, with a narrow notch.

-Water shield (Brasenia schreberi) has floating, oval leaves about 2-3 inches long with the stem attached to the center.
-Water fringe (Nympoides peltata) is also not generally in NJ. It has floating, oval leaves about 2-3 inches with a closed notch and pointed tip, and small yellow flowers.

-Pondweeds (Potamogeton sp.) can also have floating oval leaves about 5 inches long by 1 inch wide.

-Southern floating hearts (Nymphoides aquatica) Are well south of New Jersey andhave 2-inch floating heart shaped leaves.

Other water plants:

-Water chestnut (Trapa natans) has diamond shaped leaves with ruffly teeth on two sides and they grow in very round clusters floating in the water. roughly 2 inches across.
-Water pennywort (Hydrocotile sp.) has 1 to 2 inch round leaves either with a notch or with stem in center of leaf, and with very definitely crenate lobes all around it (maybe 8 lobes per leaf).
-Water lettuce (Pistia stratiotes) has wedge shaped leaves in clusters like a green flower, each leaf with veins parallel and straight and all from bottom to tip of leaf.

Posted on Νοέμβριος 22, 2020 0416 ΜΜ by srall srall


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