Displaying 1 - 25 out of 86 Object(s)
| Taxon | Collector | Date | Country | State/Province | Locality | Type Status | Barcode | Notice | ||
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| Agardhiella tenera (J.Agardh) F.Schmitz | B. Stevenson s.n. | 04 Aug 1937 | United States of America | Massachusetts | Dukes Co. Cuttyhunk Island | — |
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| Agardhiella tenera (J.Agardh) F.Schmitz | B. Stevenson s.n. | 23 Aug 1937 | United States of America | Massachusetts | Barnstable Co. 221 Pond | — |
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| Ahnfeltia plicata (Huds.) Fr. | B. Stevenson s.n. | 18 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Ahnfeltia plicata (Huds.) Fr. | B. Stevenson s.n. | 18 Aug 1937 | United States of America | Massachusetts | Dukes Co. Penikese Island | — |
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| Antithamnion cruciatum (C.Agardh) Nägeli | B. Stevenson s.n. | 18 Aug 1937 | United States of America | Massachusetts | Dukes Co. Penikese Island | — |
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| Arthrocladia villosa (Huds.) Duby | B. Stevenson s.n. | 01 Aug 1937 | United States of America | Massachusetts | Nobska Beach | — |
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| Ascophyllum nodosum (L.) Le Jol. | B. Stevenson s.n. | 14 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Asparagopsis hamifera (Har.) Okamura | B. Stevenson s.n. | 18 Aug 1937 | United States of America | Massachusetts | Dukes Co. Penikese Island | — |
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| Asparagopsis hamifera (Har.) Okamura | B. Stevenson s.n. | 25 Aug 1937 | United States of America | Massachusetts | Martha's Vineyard Island, Gay Head | — |
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| Bangia fuscopurpurea (Dillwyn) Lyngb. | B. Stevenson s.n. | 01 Sep 1937 | United States of America | Massachusetts | Barnstable Co. Black Rock | — |
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| Batrachospermum turfosum Bory | B. Stevenson s.n. | 19 Aug 1937 | United States of America | Massachusetts | Barnstable Co. John Pond | — |
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| Batrachospermum turfosum Bory | B. Stevenson s.n. | 26 Jun 1936 | United States of America | Massachusetts | Barnstable Co. Luke Pond near… | — |
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| Blidingia minima (Nägeli ex Kütz.) Kylin | B. Stevenson s.n. | 25 Aug 1937 | United States of America | Massachusetts | Dukes Co. Martha's Vineyard Island,… | — |
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| Bryopsis plumosa (Huds.) C.Agardh | B. Stevenson s.n. | 14 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Bryopsis plumosa (Huds.) C.Agardh | B. Stevenson s.n. | 01 Sep 1937 | United States of America | Massachusetts | Barnstable Co. Black Rock | — |
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| Callithamnion baileyi Harv. | B. Stevenson s.n. | 14 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Callithamnion corymbosum (Sm.) Lyngb. | B. Stevenson s.n. | 28 Jul 1937 | United States of America | Massachusetts | Barnstable Co. Nobska Beach | — |
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| Callithamnion corymbosum (Sm.) Lyngb. | B. Stevenson s.n. | 07 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Callithamnion roseum (Roth) Lyngb. | B. Stevenson s.n. | 27 Jul 1937 | United States of America | Massachusetts | Gay Head | — |
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| Ceramium diaphanum (Lightfoot) Roth | B. Stevenson s.n. | 14 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Ceramium diaphanum (Lightfoot) Roth | B. Stevenson s.n. | 04 Aug 1937 | United States of America | Massachusetts | Cuttyhunk Island | — |
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| Ceramium fastigiatum Harv. | B. Stevenson s.n. | 18 Aug 1937 | United States of America | Massachusetts | Dukes Co. Penikese Island | — |
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| Ceramium rubrum C.Agardh | B. Stevenson s.n. | 14 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Ceramium strictum (Kütz.) Harv. | B. Stevenson s.n. | 25 Jul 1937 | United States of America | Massachusetts | Gay Head | — |
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| Chaetomorpha aerea (Dillwyn) Kütz. | B. Stevenson s.n. | 28 Aug 1937 | United States of America | Massachusetts | Barnstable Co. Nobska Point | — |
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