Taxon ID:
Usage Facet: class=edible; edible_score=1.0; ornamental_score=0.0; inferred_from_taxon=no
Relationships: 0 | Linked Entities (visible): 0 | Evidence claims: 11 | History events: 0 | Catalog issue offerings: 0
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Evidence Badge: emerging | claims=11 | sources=3 | contradictions=0
Claim Types: description_snippet:3, recommendation_context:2, flavor_profile:1, fruit_size:1, productivity:1, selection_origin_reference:1, taxon_context:1 | Open evidence summary JSON | Open citation drawer JSON
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Olson is a prairie plum recorded as a Prunus nigra seedling and wild selection linked to W. J. Boughen and Boughen Nurseries at Valley River, Manitoba. The prairie cultivar index gives 1920 as its year reference. [S1][S4] It was remembered as a hardy, productive plum with better canning quality than most wild plums. [S4]
Sources disagree on its origin. Prairie sources describe Olson as a Manitoba selection from the woods handled by Boughen at Valley River. [S1][S4] A South Dakota bulletin instead says it was found many years earlier on the Vermillion River near Vermillion, South Dakota. It also notes a young tree from E. D. Cowles at Vermillion that had proven productive. [S3]
The fruit was described as small to medium and oval, with dark red skin, greenish yellow flesh, thin skin, and juicy flesh. [S4] Another source calls it fair sized, says the pit is too large for the size of the fruit, and remarks that its quality was "more like a prune than a plum." [S3] The season is late. One prairie source gives late August, while the South Dakota note simply calls it late. [S3][S4]
The tree was described as upright, a moderate grower, very hardy, and productive. [S4] The South Dakota record also supports its productivity. [S3] Prairie notes single it out as better than most wild plums for canning, which fits the prune-like quality noted by Warner. [S3][S4]
In the archive, it stands as a hardy prairie plum in the P. nigra stream of northern selections. [S1][S4] A separate recommendation list also shows an Olson kept in trial in several South Dakota districts, but that source adds no descriptive detail and may refer either to the same plum in wider testing or to another regional use of the name. [S2]
Summary source basis
This summary currently draws chiefly from Plums in South Dakota, with 4 additional supporting sources linked below.
Featured source descriptions
“Found on the Vermillion river, near Vermillion, South Dakota, many years ago.”
— [1]
“W. J. Boughen, Valley River, Manitoba, a selection from the Woods.”
— [5]
“The fruit is late and the pit is too large for size of fruit.”
— [1]
“"Quality fine, more like a prune than a plum." (H. C. Warner, Forestburg, S. D. 1903.)”
— [1]
Direct parent cultivars
Parentage claim text
Derived or downstream cultivar links
Source-story quotations
Taxonomy context: No family-tree context surfaced yet.
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 |
|---|---|---|---|---|---|---|---|
| 17 | Plums in South Dakota | unknown | 6 | 0 | 0 | p31 | "Quality fine, more like a prune than a plum." (H. C. Warner, Forestburg, S. D. 1903.); The fruit is late and the pit is too large for size of fruit.; The fruit is of fair size.; Has proven productive. |
| 112 | Pollination Studies with Stone Fruits | unknown | 4 | 0 | 0 | p4 | Species/background listed as P. nigra.; Bloom season: early.; Pollinated 3 varieties tested.; Rated as a good pollinizer in Table 3. |
| 14 | A Study of Northwestern Apples | unknown | 1 | 0 | 0 | p18 | Listed as for-trial in districts 6, 7, 8, 9, and 12 in the PLUMS section. |
| Document | Page | Claim Type | Claim | Quote | Match |
|---|---|---|---|---|---|
| 14 | p18 | recommendation_context | Listed as for-trial in districts 6, 7, 8, 9, and 12 in the PLUMS section. | PLUMS. Districts Nos. 6, 8, 9, 12—For trial: Olson, Aitkin. / District No. 7—... For trial: Olson, Stoddard. | page_block:0.90 |
| 112 | p4 | taxon_context | Species/background listed as P. nigra. | Olson 3 Early P. nigra | page_block:0.90 |
| 112 | p4 | description_snippet | Bloom season: early. | Olson 3 Early P. nigra | page_block:0.90 |
| 112 | p4 | description_snippet | Pollinated 3 varieties tested. | Olson 3 Early P. nigra | page_block:0.90 |
| 112 | p4 | recommendation_context | Rated as a good pollinizer in Table 3. | Olson 3 Early P. nigra | page_block:0.90 |
| 17 | p31 | flavor_profile | "Quality fine, more like a prune than a plum." (H. C. Warner, Forestburg, S. D. 1903.) | Olson. | page_block:0.90 |
| 17 | p31 | description_snippet | The fruit is late and the pit is too large for size of fruit. | Olson. | page_block:0.90 |
| 17 | p31 | fruit_size | The fruit is of fair size. | Olson. | page_block:0.90 |
| 17 | p31 | productivity | Has proven productive. | Olson. | page_block:0.90 |
| 17 | p31 | entry_location | Ayoung tree from E. D. Cowles, Vermillion, has proven productive. | Olson. | page_block:0.90 |
| 17 | p31 | selection_origin_reference | Found on the Vermillion river, near Vermillion, South Dakota, many years ago. | Olson. | page_block:0.90 |
| Year | Nursery | Catalog Issue | Relation |
|---|---|---|---|
| No catalog issue offerings linked. | |||
| Relation | Type | ID | Label |
|---|---|---|---|
| No linked entities at this filter level. | |||
| Type | Claim | Confidence |
|---|---|---|
| recommendation_context | Listed as for-trial in districts 6, 7, 8, 9, and 12 in the PLUMS section. | 0.97 |
| taxon_context | Species/background listed as P. nigra. | 0.97 |
| description_snippet | Bloom season: early. | 0.95 |
| description_snippet | Pollinated 3 varieties tested. | 0.95 |
| recommendation_context | Rated as a good pollinizer in Table 3. | 0.97 |
| flavor_profile | "Quality fine, more like a prune than a plum." (H. C. Warner, Forestburg, S. D. 1903.) | 0.92 |
| description_snippet | The fruit is late and the pit is too large for size of fruit. | 0.95 |
| fruit_size | The fruit is of fair size. | 0.95 |
| productivity | Has proven productive. | 0.93 |
| entry_location | A young tree from E. D. Cowles, Vermillion, has proven productive. | 0.93 |
| selection_origin_reference | Found on the Vermillion river, near Vermillion, South Dakota, many years ago. | 0.97 |
| ID | Type | Year | Label |
|---|---|---|---|
| No history events. | |||