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[Close-up photograph of a Danaea nodosa stem cross-section, 1]

Close-up photograph of a cross-section of the stem of the fern Danaea nodosa. This photograph was taken in the Maricao Forest of Puerto Rico.
Date: June 20, 1969
Creator: Carlquist, Sherwin John, 1930-2021
System: The Portal to Texas History

[Close-up photograph of a Danaea nodosa stem cross-section, 2]

Close-up photograph of a cross-section of the stem of Danaea nodosa, a tropical fern. This photograph was taken in the Maricao Forest of Puerto Rico.
Date: June 20, 1969
Creator: Carlquist, Sherwin John, 1930-2021
System: The Portal to Texas History

[Close-up photograph of a cross-section of a Danaea nodosa stem, 3]

Close-up photograph of a cross-section of the stem of Danaea nodosa. This photograph was taken in the Maricao Forest of Puerto Rico.
Date: June 20, 1969
Creator: Carlquist, Sherwin John, 1930-2021
System: The Portal to Texas History

[Close-up of unidentified leaves, buds, and fruit, Mayaguez, Puerto Rico]

Close-up photograph of the fruits, flower buds, and leaves of an unidentified plant growing in Mayaguez, Puerto Rico. The plant's more developed fruits are red, and green undeveloped fruits appear on the same branch below. Yellow-white buds are featured on the bottom right.
Date: 1969-06-20~
Creator: Carlquist, Sherwin John, 1930-2021
System: The Portal to Texas History

[Echium pininana leaning to the left]

Photograph of a tree echium plant, scientific name Echium pininana, growing in the Canary Islands. The plant leans slightly to the left.
Date: June 16, 1967
Creator: Carlquist, Sherwin John, 1930-2021
System: The Portal to Texas History