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Fruit: Mammillaria sp.; Photo by K.E. Clancy, USDA APHIS PPQ, imageID.idtools.org Fruit: Mammillaria sp.; Photo by K.E. Clancy, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Fruit: Mammillaria sp.; Photo by K.E. Clancy, USDA APHIS PPQ, imageID.idtools.org
Seeds: Mammillaria sp.; Photo by N. Diaz, USDA APHIS PPQ, imageID.idtools.org Seeds: Mammillaria sp.; Photo by N. Diaz, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Seeds: Mammillaria sp.; Photo by N. Diaz, USDA APHIS PPQ, imageID.idtools.org
Seed: Mammillaria sp., close up of hilum and partial aril; Photo by N. Diaz, USDA APHIS PPQ, imageID.idtools.org Seed: Mammillaria sp., close up of hilum and partial aril; Photo by N. Diaz, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Seed: Mammillaria sp., close up of hilum and partial aril; Photo by N. Diaz, USDA APHIS PPQ, imageID.idtools.org
Seeds: Opuntia basilaris ; Photo by J. Macdonald, RSABG Seeds: Opuntia basilaris; Photo by J. Macdonald, RSABG
Cactaceae
Seeds: Opuntia basilaris; Photo by J. Macdonald, RSABG

Seeds: Opuntia dilleni ; Photo by C. Ritchie, USDA-NRCS Plants Database Seeds: Opuntia dilleni; Photo by C. Ritchie, USDA-NRCS Plants Database
Cactaceae
Seeds: Opuntia dilleni; Photo by C. Ritchie, USDA-NRCS Plants Database
Fruit: Opuntia ficus - indica ; Photo by Jose Maria Escolano, flickr.com Fruit: Opuntia ficus-indica; Photo by Jose Maria Escolano, flickr.com
Cactaceae
Fruit: Opuntia ficus-indica; Photo by Jose Maria Escolano, flickr.com
Seed: Opuntia   ficus - indica ; Photo by V. Brewster, USDA APHIS PPQ, imageID.idtools.org Seed: Opuntia ficus-indica; Photo by V. Brewster, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Seed: Opuntia ficus-indica; Photo by V. Brewster, USDA APHIS PPQ, imageID.idtools.org
Seeds: Opuntia leptocaulis ; Photo by C. Ritchie, USDA-NRCS Plants Database Seeds: Opuntia leptocaulis; Photo by C. Ritchie, USDA-NRCS Plants Database
Cactaceae
Seeds: Opuntia leptocaulis; Photo by C. Ritchie, USDA-NRCS Plants Database

Seed, embryo: Opuntia megacantha ; Illustration by L.E. Chandler or K. Parker, Gunn & Ritchie (1998) Seed, embryo: Opuntia megacantha; Illustration by L.E. Chandler or K. Parker, Gunn & Ritchie (1998)
Cactaceae
Seed, embryo: Opuntia megacantha; Illustration by L.E. Chandler or K. Parker, Gunn & Ritchie (1998)
Embryo: Opuntia megacantha; Illustration by K. Parker, Kirkbride et al. (2006) Embryo: Opuntia megacantha; Illustration by K. Parker, Kirkbride et al. (2006)
Cactaceae
Embryo: Opuntia megacantha; Illustration by K. Parker, Kirkbride et al. (2006)
Fruits, seeds: Opuntia polyacantha var. erinacea ; Photo by J. Macdonald, RSABG Fruits, seeds: Opuntia polyacantha var. erinacea; Photo by J. Macdonald, RSABG
Cactaceae
Fruits, seeds: Opuntia polyacantha var. erinacea; Photo by J. Macdonald, RSABG
Fruits: Pachycereus pecten - aboriginum ; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org Fruits: Pachycereus pecten-aboriginum; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Fruits: Pachycereus pecten-aboriginum; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org

Fruits: Pereskia aculeata ; Photo by H. Grieb, USDA APHIS PPQ, imageID.idtools.org Fruits: Pereskia aculeata; Photo by H. Grieb, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Fruits: Pereskia aculeata; Photo by H. Grieb, USDA APHIS PPQ, imageID.idtools.org
Fruit: Pereskia aculeata ; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org Fruit: Pereskia aculeata; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Fruit: Pereskia aculeata; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org
Fruit, seeds: Pereskia aculeata ; Photo by H. Grieb, USDA APHIS PPQ, imageID.idtools.org Fruit, seeds: Pereskia aculeata; Photo by H. Grieb, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Fruit, seeds: Pereskia aculeata; Photo by H. Grieb, USDA APHIS PPQ, imageID.idtools.org
Seeds: Pereskia aculeata ; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org Seeds: Pereskia aculeata; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Seeds: Pereskia aculeata; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org

Seeds: Pereskia aculeata , showing hilar regions; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org Seeds: Pereskia aculeata, showing hilar regions; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Seeds: Pereskia aculeata, showing hilar regions; Photo by R. Young, USDA APHIS PPQ, imageID.idtools.org
Fruit: Selenicereus undatus ; Photo by Bff, commons.wikimedia.org Fruit: Selenicereus undatus; Photo by Bff, commons.wikimedia.org
Cactaceae
Fruit: Selenicereus undatus; Photo by Bff, commons.wikimedia.org
Seed: Stenocereus sp.; Photo by K.E. Clancy, USDA APHIS PPQ, imageID.idtools.org Seed: Stenocereus sp.; Photo by K.E. Clancy, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Seed: Stenocereus sp.; Photo by K.E. Clancy, USDA APHIS PPQ, imageID.idtools.org
Fruits: Stenocereus queretaroensis ; Photo by C. Hart, USDA APHIS PPQ, imageID.idtools.org Fruits: Stenocereus queretaroensis; Photo by C. Hart, USDA APHIS PPQ, imageID.idtools.org
Cactaceae
Fruits: Stenocereus queretaroensis; Photo by C. Hart, USDA APHIS PPQ, imageID.idtools.org

Fruit: Calycanthus floridus ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Fruit: Calycanthus floridus; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Calycanthaceae
Fruit: Calycanthus floridus; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Seeds: Calycanthus floridus ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Seeds: Calycanthus floridus; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Calycanthaceae
Seeds: Calycanthus floridus; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Embryo: Calycanthus floridus ; Illustration by K. Parker, Kirkbride et al. (2006) Embryo: Calycanthus floridus; Illustration by K. Parker, Kirkbride et al. (2006)
Calycanthaceae
Embryo: Calycanthus floridus; Illustration by K. Parker, Kirkbride et al. (2006)
Embryo: Chimonanthus praecox ; Illustration by K. Parker, Kirkbride et al. (2006) Embryo: Chimonanthus praecox; Illustration by K. Parker, Kirkbride et al. (2006)
Calycanthaceae
Embryo: Chimonanthus praecox; Illustration by K. Parker, Kirkbride et al. (2006)

Embryo: Acicarpha spathulata ; Illustration by K. Parker, Kirkbride et al. (2006) Embryo: Acicarpha spathulata; Illustration by K. Parker, Kirkbride et al. (2006)
Calyceraceae
Embryo: Acicarpha spathulata; Illustration by K. Parker, Kirkbride et al. (2006)
Embryo: Boopis bupleuroides ; Illustration by K. Parker, Kirkbride et al. (2006) Embryo: Boopis bupleuroides; Illustration by K. Parker, Kirkbride et al. (2006)
Calyceraceae
Embryo: Boopis bupleuroides; Illustration by K. Parker, Kirkbride et al. (2006)
Fruit: Calycera calcitrapa ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Fruit: Calycera calcitrapa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Calyceraceae
Fruit: Calycera calcitrapa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Fruit: Calycera calcitrapa ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Fruit: Calycera calcitrapa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Calyceraceae
Fruit: Calycera calcitrapa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)

Seed: Calycera calcitrapa ; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006) Seed: Calycera calcitrapa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Calyceraceae
Seed: Calycera calcitrapa; Photo by R. Gibbons, USDA APHIS PPQ, Kirkbride et al. (2006)
Embryo: Calycera calcitrapa ; Illustration by K. Parker, Kirkbride et al. (2006) Embryo: Calycera calcitrapa; Illustration by K. Parker, Kirkbride et al. (2006)
Calyceraceae
Embryo: Calycera calcitrapa; Illustration by K. Parker, Kirkbride et al. (2006)
Seeds: Campanula americana ; Photo by C. Ritchie, USDA-NRCS Plants Database Seeds: Campanula americana; Photo by C. Ritchie, USDA-NRCS Plants Database
Campanulaceae
Seeds: Campanula americana; Photo by C. Ritchie, USDA-NRCS Plants Database
Seeds: Campanula glomerata ; Photo by C. Ritchie, USDA-NRCS Plants Database Seeds: Campanula glomerata; Photo by C. Ritchie, USDA-NRCS Plants Database
Campanulaceae
Seeds: Campanula glomerata; Photo by C. Ritchie, USDA-NRCS Plants Database