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Fruit: Hydatella filamentosa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Fruit: Hydatella filamentosa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydatellaceae
Fruit: Hydatella filamentosa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Seeds: Hydatella filamentosa ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Seeds: Hydatella filamentosa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydatellaceae
Seeds: Hydatella filamentosa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Embryo: Trithuria submersa ; Illustration by K. Parker, Kirkbride et al. (2006) Embryo: Trithuria submersa; Illustration by K. Parker, Kirkbride et al. (2006)
Hydatellaceae
Embryo: Trithuria submersa; Illustration by K. Parker, Kirkbride et al. (2006)
Seed: Hydnora africana ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Seed: Hydnora africana; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydnoraceae
Seed: Hydnora africana; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Seeds: Hydnora africana ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Seeds: Hydnora africana; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydnoraceae
Seeds: Hydnora africana; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Embryo: Prosopanche americana ; Illustration by K. Parker, Kirkbride et al. (2006) Embryo: Prosopanche americana; Illustration by K. Parker, Kirkbride et al. (2006)
Hydnoraceae
Embryo: Prosopanche americana; Illustration by K. Parker, Kirkbride et al. (2006)
Fruit: Decumaria barbara ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Fruit: Decumaria barbara; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrangeaceae
Fruit: Decumaria barbara; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Seeds: Decumaria barbara ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Seeds: Decumaria barbara; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrangeaceae
Seeds: Decumaria barbara; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Fruit: Hydrangea integrifolia ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Fruit: Hydrangea integrifolia; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrangeaceae
Fruit: Hydrangea integrifolia; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Seeds: Hydrangea integrifolia ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Seeds: Hydrangea integrifolia; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrangeaceae
Seeds: Hydrangea integrifolia; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Embryo: Philadelphus lewisii ; Illustration by K. Parker, Kirkbride et al. (2006) Embryo: Philadelphus lewisii; Illustration by K. Parker, Kirkbride et al. (2006)
Hydrangeaceae
Embryo: Philadelphus lewisii; Illustration by K. Parker, Kirkbride et al. (2006)
Fruit: Najas marina ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Fruit: Najas marina; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrocharitaceae

Fruit: Najas marina; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)


Seed: Najas marina ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Seed: Najas marina; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrocharitaceae

Seed: Najas marina; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Embryo: Najas flexilis ; Illustration by K. Parker, Kirkbride et al. (2006)

Embryo: Najas flexilis; Illustration by K. Parker, Kirkbride et al. (2006)
Hydrocharitaceae

Embryo: Najas flexilis; Illustration by K. Parker, Kirkbride et al. (2006)

Fruit: Ottelia alismoides ; Photo by J. Scher, Federal Noxious Weed Disseminules of the US Fruit: Ottelia alismoides; Photo by J. Scher, Federal Noxious Weed Disseminules of the US
Hydrocharitaceae
Fruit: Ottelia alismoides; Photo by J. Scher, Federal Noxious Weed Disseminules of the US
Seeds: Ottelia alismoides ; Photo by J. Scher, Federal Noxious Weed Disseminules of the US

Seeds: Ottelia alismoides; Photo by J. Scher, Federal Noxious Weed Disseminules of the US
Hydrocharitaceae

Seeds: Ottelia alismoides; Photo by J. Scher, Federal Noxious Weed Disseminules of the US


Seeds: Ottelia alismoides ; Photo by J. Scher, Federal Noxious Weed Disseminules of the US Seeds: Ottelia alismoides; Photo by J. Scher, Federal Noxious Weed Disseminules of the US
Hydrocharitaceae
Seeds: Ottelia alismoides; Photo by J. Scher, Federal Noxious Weed Disseminules of the US
Seed, embryo: Ottelia alismoides (A, seed; B, embryo in situ; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)

Seed, embryo: Ottelia alismoides (A, seed; B, embryo in situ; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)
Hydrocharitaceae

Seed, embryo: Ottelia alismoides (A, seed; B, embryo in situ; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)

Seeds: Ottelia ovalifolia ssp. ovalifolia ; Photo by South Australian Seed Conservation Centre, used with permission Seeds: Ottelia ovalifolia ssp. ovalifolia; Photo by South Australian Seed Conservation Centre, used with permission
Hydrocharitaceae
Seeds: Ottelia ovalifolia ssp. ovalifolia; Photo by South Australian Seed Conservation Centre, used with permission
Seeds: Ottelia ovalifolia ssp. ovalifolia ; Photo by South Australian Seed Conservation Centre, used with permission Seeds: Ottelia ovalifolia ssp. ovalifolia; Photo by South Australian Seed Conservation Centre, used with permission
Hydrocharitaceae
Seeds: Ottelia ovalifolia ssp. ovalifolia; Photo by South Australian Seed Conservation Centre, used with permission

Fruits: Ottelia ovalifolia ; Photo by South Australian Seed Conservation Centre, used with permission Fruits: Ottelia ovalifolia; Photo by South Australian Seed Conservation Centre, used with permission
Hydrocharitaceae
Fruits: Ottelia ovalifolia; Photo by South Australian Seed Conservation Centre, used with permission
Fruit: Elodea bifoliata ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Fruit: Elodea bifoliata; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrocharitaceae

Fruit: Elodea bifoliata; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Seeds: Elodea bifoliata ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Seeds: Elodea bifoliata; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrocharitaceae

Seeds: Elodea bifoliata; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Fruit: Halophila decipiens ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Fruit: Halophila decipiens; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrocharitaceae

Fruit: Halophila decipiens; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)


Seeds: Halophila decipiens ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Seeds: Halophila decipiens; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrocharitaceae

Seeds: Halophila decipiens; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Seed: Hydrilla verticillata , cluster; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Seed: Hydrilla verticillata, cluster; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrocharitaceae

Seed: Hydrilla verticillata, cluster; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Seed, embryo: Hydrilla verticillata (A, seed; B, longitudinal section, embryo indiscernible; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)

Seed, embryo: Hydrilla verticillata (A, seed; B, longitudinal section, embryo indiscernible; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)
Hydrocharitaceae

Seed, embryo: Hydrilla verticillata (A, seed; B, longitudinal section, embryo indiscernible; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)

Fruit: Vallisneria australis ; Photo by South Australian Seed Conservation Centre, used with permission Fruit: Vallisneria australis; Photo by South Australian Seed Conservation Centre, used with permission
Hydrocharitaceae
Fruit: Vallisneria australis; Photo by South Australian Seed Conservation Centre, used with permission

Fruit, seeds: Vallisneria australis, fruit opened showing seeds; Photo by South Australian Seed Conservation Centre, used with permission Fruit, seeds: Vallisneria australis, fruit opened showing seeds; Photo by South Australian Seed Conservation Centre, used with permission
Hydrocharitaceae
Fruit, seeds: Vallisneria australis, fruit opened showing seeds; Photo by South Australian Seed Conservation Centre, used with permission
Seed, embryo: Vallisneria spiralis (A, seed; B, embryo in situ; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)

Seed, embryo: Vallisneria spiralis (A, seed; B, embryo in situ; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)
Hydrocharitaceae

Seed, embryo: Vallisneria spiralis (A, seed; B, embryo in situ; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)

Seed, embryo: Vallisneria gigantea (A, seed; B, embryo in situ; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988) Seed, embryo: Vallisneria gigantea (A, seed; B, embryo in situ; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)
Hydrocharitaceae
Seed, embryo: Vallisneria gigantea (A, seed; B, embryo in situ; C, transection of seed); Illustration by L.E. Chandler from Gunn and Ritchie (1988)
Fruits: Lagerosiphon sp.; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Fruits: Lagerosiphon sp.; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Hydrocharitaceae

Fruits: Lagerosiphon sp.; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)