Emergent Plant Series: #1, Submerged Plant Stage (3.19485)
Date: 1950sCreator: Watts, May Theilgaard
Type: Drawing
Description:Part of a series of numbered illustrations about the stages of pond growth. This material includes an aerial view of a pond with trees and hills in background, and a cross-section view of five types of submerged aquatic plants attached to pond bottom.
Header: SUBMERGED PLANT STAGE / PLANTS ATTACHED TO BOTTOM / only their flowers reach the surface
Drawings and text from top to bottom, left to right:
- pond and surrounding landscape
- cross-section:
- WATER WEED--Elodea canadensis
- EEL GRASS--Vallisneria spiralis
- PONDWEED--Potamogeton crispus
- HORNWORT--Ceratophyllum demersum
- WATER MILFOIL--Myriophyllum spicatum
Extent: 1 sheet
Emergent Plant Series: #2, Floating-Leaf Plant Stage (3.19486)
Date: 1950sCreator: Watts, May Theilgaard
Type: Drawing
Description:Part of a series of numbered illustrations about the stages of pond growth. This material includes an aerial view of a pond showing some plants at the surface of its bay with trees and hills in background, and a cross-section view of aquatic plants attached to pond bottom, with leaves and flowers of shallower plants extended to water's surface.
Header: FLOATING-LEAF PLANT STAGE / PLANTS ATTACHED TO BOTTOM / leaves and flowers floating at surface
Drawings and text from top to bottom, left to right:
- pond and surrounding landscape
- cross-section [divided into 4 sections]:
- FLOATING LEAF ZONE
- water lily
- cow lily
- SUBMERGED PLANT ZONE
- water weed
- eel grass
- pondweed
- hornwort
- water milfoil
- SUBMERGED PLANT STAGE
- FLOATING LEAF ZONE
- FLOATING LEAF ZONE
Extent: 1 sheet
Growth of Pond: Submerged Plant Stage (3.19492)
Date: 1940 – 1950Creator: Watts, May Theilgaard
Type: Drawing
Description:Part of a series of illustrations about the stages of pond growth. This material includes an aerial view of a pond with two bays and a cross-section view of five types of submerged aquatic plants attached to pond bottom.
Header: SUBMERGED PLANT STAGE / PLANTS ATTACHED TO BOTTOM / only their flowers float on the surface
Drawings and text from top to bottom, left to right:
- Pond: sheltered bays are first to show vegetation
- CROSS-SECTION of MARGIN
- Water milfoil--Myriophyllum spicatum
- Water weed--Elodea canadensis
- Eelgrass--Vallisneria spiralis
- Pondweed--Potamogeton crispus
- Hornwort--Ceratophyllum demersum
Extent: 1 sheet
Growth of Pond: Emergent Plant Stage (3.19494)
Date: 1940 – 1950Creator: Watts, May Theilgaard
Type: Drawing
Description:Part of a series of illustrations about the stages of pond growth. This material includes an aerial view of a pond with some plants showing at the surface of its edges and its bays, and a cross-section view of aquatic plants attached to pond bottom, with leaves and flowers of shallower plants extended up to and above the water's surface.
Header: EMERGENT PLANT STAGE / PLANTS UPRIGHT / only roots and base under water
Drawings and text from top to bottom, left to right:
- Pond
- CROSS-SECTION of MARGIN [divided into 3 sections]:
- Emergent Plant Zone
- cat-tails
- arrowhead
- bur reed
- pickerel weed
- bullrush
- Floating Plant Zone
- white water lily
- cow lily
- Submerged Plant Zone
- pondweed
- eel grass
- water milfoil
- etc.
- Emergent Plant Zone
Extent: 1 sheet