Taxon ID:
Usage Facet: class=edible; edible_score=5.0; ornamental_score=0.0; inferred_from_taxon=no
Relationships: 0 | Linked Entities (visible): 0 | Evidence claims: 18 | History events: 0 | Catalog issue offerings: 0
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Evidence Badge: emerging | claims=18 | sources=1 | contradictions=0
Claim Types: culinary_use:2, fruit_color:1, fruit_size:1, release_year_reference:1 | Open evidence summary JSON | Open citation drawer JSON
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Oacoma is a selected native plum listed in the bulletin under Prunus americana. It was introduced in 1938 from a wild tree in South Dakota found a few miles west of Oacoma in Lyman County. By 1934, it was already being circulated as South Dakota No. 12. The bulletin presents it as a notable pure native South Dakota plum, not a hybrid. [S1]
The fruit is described as red, round, and about 1 3/8 inches across. It was praised as being of very best quality for fresh eating or preserves. The skin is thin and dissolves in cooking. The pit is rather small, round, flattened, and smooth edged. [S1]
The tree is described as hardy and a heavy bearer. The bulletin says native plums from northern origins were hardier and more productive in South Dakota than plums from farther south. This places Oacoma within a deliberate search for better local Prunus americana selections. Native plums were also valued for strong flavor, especially in preserves and jams, and for pollinating hybrid plums that bloom in the same season. [S1]
Oacoma is part of the South Dakota program to select superior native plums from many thousands of seedlings. The bulletin says selected native plums lost ground after larger hybrid plums such as Waneta became popular, but it still singled out Oacoma as a plum whose quality should make it a general favorite. No direct parentage is given beyond its identity as a selected native plum. [S1]
Summary source basis
This summary currently draws chiefly from New Hardy Fruits for the Northwest.
Featured source descriptions
“The original tree was found a few miles west of Oacoma in Lyman County and was first sent out as South Dakota No. 12 in 1934.”
— [1]
“Skin is thin and dissolves in cooking; the pit is rather small, round, flattened, with smooth rounded edges and no sharp points.”
— [1]
“Listed in the table of contents under 'Select Native Plums.'”
— [1]
“Indexed to Bulletin 339, page 24.”
— [1]
Direct parent cultivars
Parentage claim text
Derived or downstream cultivar links
Source-story quotations
Taxonomy context: Genus: Prunus | open genus tree
Related cultivars mentioned in source context
Zone assertions are structured rows. Hardiness claim text appears in evidence claims and page-linked citations.
| Zone Min | Zone Max | Zone Text | Assertion Type | Outcome | Location | Confidence |
|---|---|---|---|---|---|---|
| No explicit zone assertion rows yet. | ||||||
No linked media assets.
| Document | Title/URL | Rights | Claims | Relationships | History Events | Pages | Snippets |
|---|---|---|---|---|---|---|---|
| 1 | New Hardy Fruits for the Northwest | unknown | 18 | 0 | 0 | p25 | Oacoma: cooking; Oacoma: preserves; Oacoma: 1 % inches; Oacoma: red |
| Document | Page | Claim Type | Claim | Quote | Match |
|---|---|---|---|---|---|
| 1 | p25 | verbatim_quote | Kahinta was introduced in 1912, Waneta in 1913, and Tawena in 1924 | Kahinta was introduced in 1912, Waneta in 1913, and Tawena in 1924 | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | Kahinta, Waneta, and Tawena were described in S | Kahinta, Waneta, and Tawena were described in S | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | Nurserymen quickly replaced the selected native plums with the large hybrids in response to the popular demand | Nurserymen quickly replaced the selected native plums with the large hybrids in response to the popular demand | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | Hybrid Plums Work with the native plum, Prunus Ame ricana, nearly stopped when the large hybrids such as Waneta appeared | Hybrid Plums Work with the native plum, Prunus Ame ricana, nearly stopped when the large hybrids such as Waneta appeared | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | 12 in 1934 | 12 in 1934 | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | The original tree of Oacoma was found a few miles west of Oacoma in Lyman County and was first sent out as South Dakota No | The original tree of Oacoma was found a few miles west of Oacoma in Lyman County and was first sent out as South Dakota No | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | The tree is hardy and a heavy bearer | The tree is hardy and a heavy bearer | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | The high quality of this pure native South Dakota plum should quickly make it a general favorite | The high quality of this pure native South Dakota plum should quickly make it a general favorite | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | The pit is rather small, round, flattened, with smooth rounded edges and no sharp points | The pit is rather small, round, flattened, with smooth rounded edges and no sharp points | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | Skin thin, dissolves in cooking | Skin thin, dissolves in cooking | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | Fruit red, round, 1 % inches across, of very best quality eaten fresh or as preserves | Fruit red, round, 1 % inches across, of very best quality eaten fresh or as preserves | normalized_exact:1.00 |
| 1 | p25 | verbatim_quote | OACOMA plum-1938 | OACOMA plum-1938 | normalized_exact:1.00 |
| Year | Nursery | Catalog Issue | Relation |
|---|---|---|---|
| No catalog issue offerings linked. | |||
| Relation | Type | ID | Label |
|---|---|---|---|
| No linked entities at this filter level. | |||
| Type | Claim | Confidence |
|---|---|---|
| culinary_use | cooking | 0.56 |
| culinary_use | preserves | 0.56 |
| fruit_size | 1 % inches | 0.58 |
| fruit_color | red | 0.55 |
| structured_entry_json | {"cultivar_name":"Oacoma","year":1938,"heading_raw":"OACOMA","locations":[],"crosses":[],"fruit_size_mentions":["1 % inches","12 in"],"color_mentions":["red"],"morphology_terms":["round"],"pedigree_phrases":[],"flavor_ph | 0.95 |
| verbatim_quote | Kahinta was introduced in 1912, Waneta in 1913, and Tawena in 1924 | 0.97 |
| verbatim_quote | Kahinta, Waneta, and Tawena were described in S | 0.97 |
| verbatim_quote | Nurserymen quickly replaced the selected native plums with the large hybrids in response to the popular demand | 0.97 |
| verbatim_quote | Hybrid Plums Work with the native plum, Prunus Ame ricana, nearly stopped when the large hybrids such as Waneta appeared | 0.97 |
| verbatim_quote | 12 in 1934 | 0.97 |
| verbatim_quote | The original tree of Oacoma was found a few miles west of Oacoma in Lyman County and was first sent out as South Dakota No | 0.97 |
| verbatim_quote | The tree is hardy and a heavy bearer | 0.97 |
| verbatim_quote | The high quality of this pure native South Dakota plum should quickly make it a general favorite | 0.97 |
| verbatim_quote | The pit is rather small, round, flattened, with smooth rounded edges and no sharp points | 0.97 |
| verbatim_quote | Skin thin, dissolves in cooking | 0.97 |
| verbatim_quote | Fruit red, round, 1 % inches across, of very best quality eaten fresh or as preserves | 0.97 |
| verbatim_quote | OACOMA plum-1938 | 0.97 |
| release_year_reference | 1938 | 0.92 |
| ID | Type | Year | Label |
|---|---|---|---|
| No history events. | |||