Displaying 1 - 50 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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| Chaetomorpha linum (O.F.Müll.) Kütz. | B. Stevenson s.n. | 1937 | United States of America | Massachusetts | Woods Hole and vicinity | — |
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| Chaetomorpha linum (O.F.Müll.) Kütz. | B. Stevenson s.n. | 25 Aug 1937 | United States of America | Massachusetts | Martha's Vineyard Island, Gay Head | — |
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| Chara evoluta Allen | B. Stevenson s.n. | 31 Jul 1937 | United States of America | Massachusetts | Barnstable Co. Chara Pond | — |
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| Chara leptosperma A.Braun ex A.Braun & Nordst. | B. Stevenson s.n. | 31 Jul 1937 | United States of America | Massachusetts | Woods Hole and vicinity | — |
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| Chondria baileyana (Mont.) Harv. | B. Stevenson s.n. | 17 Jul 1928 | United States of America | Massachusetts | Cuttyhunk Island | — |
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| Chondria tenuissima C.Agardh | B. Stevenson s.n. | s.d. | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Chondria tenuissima C.Agardh | B. Stevenson s.n. | 07 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Chondrus crispus Stackh. | B. Stevenson s.n. | 10 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Chorda filum (L.) Stackh. | B. Stevenson s.n. | 14 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Cladophora refracta Kütz. | B. Stevenson s.n. | 28 Jul 1937 | United States of America | Massachusetts | Barnstable Co. Nobska | — |
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| Cladostephus verticillatus (Lightf.) Lyngb. | B. Stevenson s.n. | 10 Aug 1937 | United States of America | Massachusetts | Barnstable Co. Nobska Beach | — |
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| Cystoclonium purpurascens (Huds.) Kütz. | B. Stevenson s.n. | 18 Aug 1937 | United States of America | Massachusetts | Dukes Co. Penikese Island | — |
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| Dasya baillouviana (S.G.Gmel.) Mont. | B. Stevenson s.n. | 06 Aug 1937 | United States of America | Massachusetts | Barnstable Co. Fisheries Dock | — |
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| Desmarestia aculeata (L.) J.V.Lamour. | B. Stevenson s.n. | 25 Aug 1937 | United States of America | Massachusetts | Martha's Vineyard Island, Gay Head | — |
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| Dictyosiphon | B. Stevenson s.n. | 12 Aug 1937 | United States of America | Massachusetts | Martha's Vineyard | — |
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| Dictyosiphon | B. Stevenson s.n. | 18 Jul 1937 | United States of America | Massachusetts | Dukes Co. Penikese Island | — |
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| Elachista fucicola (Velley) Aresch. | B. Stevenson s.n. | 14 Aug 1937 | United States of America | Massachusetts | Pine Island | — |
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| Fosliella | B. Stevenson s.n. | 01 Sep 1937 | United States of America | Massachusetts | Woods Hole and vicinity | — |
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| Fucus spiralis L. | B. Stevenson s.n. | 18 Aug 1937 | United States of America | Massachusetts | Dukes Co. Penikese Island | — |
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| Gelidium crinale (Hare ex Turner) Gaillon | B. Stevenson s.n. | 01 Sep 1937 | United States of America | Massachusetts | Barnstable Co. Black Rock | — |
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| Gracilaria foliifera (Forssk.) Børgesen | B. Stevenson s.n. | 23 Aug 1937 | United States of America | Massachusetts | Barnstable Co. Eel Pond | — |
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| Griffithsia | B. Stevenson s.n. | 29 Jul 1937 | United States of America | Massachusetts | Barnstable Co. Spindle | — |
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| Grinnellia americana (C.Agardh) Harv. | B. Stevenson s.n. | 14 Aug 1937 | United States of America | Massachusetts | Dukes Co. Nonamesset Island | — |
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| Hypnea musciformis (Wulfen) J.V.Lamour. | B. Stevenson s.n. | 27 Jul 1937 | United States of America | Massachusetts | Woods Hole and vicinity | — |
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| Laminaria agardhii Kjellm. | B. Stevenson s.n. | 18 Aug 1937 | United States of America | Massachusetts | Dukes Co. Penikese Island | — |
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