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Aquatic Vascular Plants of New England, Station Bulletin, No.527

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Aquatic Vascular Plants of New England, Station Bulletin, No.527 University of New Hampshire University of New Hampshire Scholars' Repository NHAES Bulletin New Hampshire Agricultural Experiment Station 3-1-1984 Aquatic vascular plants of New England, Station Bulletin, no.527 Hellquist, C. B. Crow, G. E. New Hampshire Agricultural Experiment Station Follow this and additional works at: https://scholars.unh.edu/agbulletin Recommended Citation Hellquist, C. B.; Crow, G. E.; and New Hampshire Agricultural Experiment Station, "Aquatic vascular plants of New England, Station Bulletin, no.527" (1984). NHAES Bulletin. 488. https://scholars.unh.edu/agbulletin/488 This Text is brought to you for free and open access by the New Hampshire Agricultural Experiment Station at University of New Hampshire Scholars' Repository. It has been accepted for inclusion in NHAES Bulletin by an authorized administrator of University of New Hampshire Scholars' Repository. For more information, please contact [email protected]. kTION BULLETIN 527 M arch v 1984 U Owl •21 luatic Vascular Plants of New England: Part 7. Cabombaceae, Nymphaeaceae, Nelumbonaceae, and Ceratophyllaceae by C. B. Hellquist and G. E. Crow NEW HAMPSHIRE AGRICULTURAL EXPERIMENT STATION UNIVERSITY OF NEW HAMPSHIRE DURHAM, NEW HAMPSHIRE 03824 ISSN: 0077-8338 University of New Hampshire Library' kTION BULLETIN 527 March, 1984 IU juatic Vascular Plants of New England: Part 7. Cabombaceae, Nymphaeaceae, Nelumbonaceae, and Ceratophyllaceae by C. B. Hellquist and G. E. Crow NEW HAMPSHIRE AGRICULTURAL EXPERIMENT STATION UNIVERSITY OF NEW HAMPSHIRE DURHAM, NEW HAMPSHIRE 03824 5 ACKNOWLEDGEMENTS We wish to thank Edward G. Voss, Carroll E. Wood, and Donald H. Les for their helpful comments on the manuscript. We are also grateful to the curators of the following herbaria for use of their collections: BRU, CONN, CUW, GH, HNH, KIRI, MASS, MAINE, NASC, NCBS, NHA, NEBC, VT, YU. A special thanks is extended to Pamela Bruns Brayton who prepared the illustrations. Permission to redraw some figures from Fassett's Manual of Aquatic Plants used in Figure 7 was kindly provided by the University of Wisconsin Press. This work is a result of research sponsored by the New Hampshire Agricultural Experiment Station. The NHAES reserves the right to reproduce, publish or otherwise use, and to authorize others to use, the work for Government purposes notwithstanding notice of copyright. Copyright £ 1984 by the University of New Hampshire. No part of this work may be reproduced in any manner without permission from the authors and the University of New Hampshire. Programs of the New Hampshire Agricultural Experiment Station are open to all persons without regard to race, color, national origin or sex. The University of New Hampshire is an Affirmative Action/Equal Opportunity Employer. UNH LIBRARY 3 MbOD DOblfl M75S ABSTRACT This paper is the seventh in a series of reports on the aquatic and wetland flora of New England. It treats all species of the Cabombaceae, Nymphaeaceae, Nelumbonaceae, and Ceratophyllaceae occurring in New England and includes keys, comments on taxonomy and nomen- clature, habitat and distributional information, water chemistry data, illustrations, and dot maps. Those species regarded as rare and endangered in the New England Region or in one or more of the six New England States are also noted. One species, Nymphaea tetragona, is presently under consideration by the U.S. Fish and Wildlife Service for listing under the Endangered Species Act of 1973. KEY WORDS: Aquatic Plants, New England Flora, Taxonomy, Cabombaceae, Nymphaeaceae, Nelumbonaceae, Ceratophyllaceae, Cabomba, Brasenia, Nymphaea. Nuphar, Nelumbo. Ceratophyllum. Fanwort. Water-shield, Water-lily, Pond-lily, Yellow Water-lily. Spatterdock, Cow-lily, Lotus. Water Chinquapin, Coontail, Hornwort. TABLE OF CONTENTS Page INTRODUCTION 1 CABOMBACEAE 2 Cabomba 2 Cabomba earoliniana 2 Brasenia 2 Brasenia schreberi 6 NYMPHAEACEAE 6 Nymphaea 6 Key to Species 6 Nymphaea odorata 9 Nymphaea tuberosa 9 Nymphaea tetragona 9 Nuphar 10 Key to Species 10 Nuphar pumila 13 Nuphar X rubrodisca 13 Nuphar uariegata 13 Nuphar advena 19 NELUMBONACEAE 19 Nelumbo 19 Nelumbo lutea 19 CERATOPHYLLACEAE 19 Ceratophyllum 19 Key to Species 21 Ceratophyllum demersum 21 Ceratophyllum echinatum 21 Literature Cited and Selected References '. 24 n Aquatic Vascular Plants of New England: Part 7. Cabombaceae, Nymphaeaceae, Nelumbonaceae, and Ceratophyllaceae by C. B. Hellquist and G. E. Crow 1 INTRODUCTION This is the seventh in a series of reports on the aquatic and wetland flora of New England. These reports are intended to aid conservationists, fish and game personnel, consultants, botanists, and students in the identification of aquatic plants. The coverage is strictly New England but is of value throughout the northeast. Data have been gathered from herbaria in New England and from personal field work. The chemical data included represent samples from many waters throughout New England. The alkalinity readings are total alkalin- ity, expressed as milligrams per liter (mg/1) CaC0 3 . The number of observations is given in parentheses following alkalinity and pH values. Since pH and alkalinity vary greatly during the day, the values are only indicative of the water quality. The rare and endangered plant lists referred to are those prepared for each of the six New England states by the New England Botanical Club in cooperation with the United States Fish and Wildlife Service, Office of Endangered Species, Newton Corner, MA (RI — Church and Champlin, 1978; MA — Coddington and Field, 1978; VT — Country- man, 1978; ME — Eastman, 1978; CT — Mehrhoff, 1978; NH — Storks and Crow, 1978). Taxa indicated as rare, threatened or endangered for the entire New England Region are also noted (Crow et ai, 1981, Rhodora 83: 259-299). We invite comments and/or criticisms on this treatment. Infor- mation on any species omitted or any additional localities will be welcomed. If anyone is interested in specific localities of any of the species indicated on the dot maps, please contact us. 'Dr. C. Barre Hellquist, Department of Biology, North Adams State College. North Adams, MA 01247. Dr. Garrett E. Crow, Department of Botany and Plant Pathology, Nesmith Hall, University of New Hampshire, Durham, NH 03824. CABOMBACEAE 1. Submersed leaves opposite, dissected into linear segments (fig. 1); floating leaves small, inconspicuous, oblong to linear-elliptic, pel- tate, less than 2 cm long, subtending flowers (fig. 1); submersed portions of plants lacking mucilaginous coating; flowers white to pinkish; stamens 3-6. 1. Cabomha 1. Submersed leaves absent, except on young plants, then alternate (fig. 2B); floating leaves prominent, peltate, elliptical, 2-10 cm long (fig. 2); submersed portions of plants typically with a mucilaginous coating; flowers red-purple; stamens 12 or more. 2. Brasenia Cabomba (Fanwort) Perennial, arising from short rhizomes with fibrous roots; submersed leaves opposite, petioled, fan-like, with finely dissected divisions; floating leaves alternate, small, oblong to linear-elliptic, peltate; flowers usually solitary, borne in axils of floating leaves; perianth white to pinkish, about 12 mm long; carpels (2-)3(-4), separ- ate; fruit leathery, indehiscent, 3-seeded follicle. 1. Cabomba caroliniana Gray Fig. 1, Map 1 Locally abundant and weedy in acidic waters of southern New England. This aggressive weed was first reported in New England from Cranston, Rhode Island in 1933. Herbicides and mechanical harvesting have proven completely ineffective for controlling this species. Range extends from southern New Hampshire and Massa- chusetts west to New York, Pennsylvania, southern Michigan, south- ern Illinois, and Missouri, south to Florida, eastern Oklahoma, and eastern Texas. alkalinity: mean 15.8; range 3.5-35.0 mg/1; (13) pH: mean 6.5; range 5.9-6.8; (10) Brasenia (Water Shield) Perennial, arising from creeping rhizomes; all leaves floating (submersed leaves present only on young plants), elliptic, peltate; submersed parts typically covered with a thick, mucilaginous coat- ing; flowers solitary, axillary; perianth red-purple, 12-20 mm long; carpels 4-10, separate; fruit a leathery, indehiscent, 1-2 seeded follicle. floating leaf Figure 1. Cabomba caroliniana: habit * ¥2. Figure 2. * Brasenia schreberi: A. habit '/•>. B. submersed leaves * of young plant V->. C winter bud with thick mucilagi- nous coating « V>. D. flower "I.E. section of flower * showing separate carpels 1 '/•>. 1. Brasenia schreberi Gmel. Fig. 2, Map 2 Common in slow moving and standing waters throughout New England. Range extends from Prince Edward Island west to southern Quebec, southern Ontario, and Minnesota, south to Florida and Texas; southern British Columbia to Oregon; Mexico and Central America. alkalinity: mean 15.9 mg/1; range 2.5-111.5 mg/1; (53) pH: mean 6.6; range 5.7-9.5; (51) NYMPHAEACEAE 1. Flowers white to pinkish, broadly open (figs. 3,4); sepals 4, greenish; petals numerous, conspicuous, elliptic to spatulate to oblanceolate; stigmas radiate from globose ovary summit extending into linear, incurved sterile appendages; leaves orbicular, lobes with recurved tips (fig. 3A,D), venation essentially palmate (fig. 3A,D). 1. Nymphaea 1. Flowers yellow, sometimes greenish or reddish, subglobose (fig. 7); sepals 5-6(-9); petals numerous, strap-like, usually shorter than, but resembling the stamens, recurved; stigmas sessile, radiate on a disc (fig. 7), appendages lacking; leaves orbicular-reniform, ovate to oblong, lobes rounded at tip (figs. 5,6), venation essentially
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