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: 7 | History events: 0 | Catalog issue offerings: 0
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Evidence Badge: emerging | claims=7 | sources=1 | contradictions=0
Claim Types: description_snippet:1, flavor_profile:1, fruit_color:1, fruit_size:1, selection_origin_reference:1, storage_duration:1 | Open evidence summary JSON | Open citation drawer JSON
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Duchess of Oldenburg is a large Russian apple in the Duchess group of hardy northern apples. A Study of Northwestern Apples calls it a well known Russian variety and points readers to the Duchess and Duchess Group discussions for synonyms and related varieties. The same source calls it the hardiest apple in its old list. Its survival through severe winters helped encourage more Russian apple importation. [S1]
The fruit is large, regular, and roundish oblate. The skin is smooth greenish yellow and almost covered with stripes and splashes, with crimson on the sunny side. The source calls it handsome and notes many minute white dots. [S1]
The flesh is white, sprightly acid, and rated good. The cavity is deep and regular, with a small radiating patch of russet at the base. The basin is abrupt and regular, with small protuberances around the eye. The calyx is closed. [S1]
Its season is August and September. The packet gives no separate storage duration beyond that season. [S1]
The available source block gives no breeder, release year, direct parentage, disease notes, or tree habit. Its strongest hardiness statement is qualitative: Duchess of Oldenburg is described as the hardiest of the old list, and its severe winter endurance was important enough to influence later Russian apple collecting. [S1]
Summary source basis
This summary currently draws chiefly from A Study of Northwestern Apples.
Featured source descriptions
“The variety is identified as Russian.”
— [1]
“Cavity deep, regular, acute, with a small radiating patch of russet in bottom; stem short to medium; basin abrupt, regular, with small protuberances around the eye; calyx closed, segments long, broad, connivent.”
— [1]
“This well known Russian variety is described as the hardiest of the old list.”
— [1]
“Core closed; cells ovate, axile; tube funnel-shaped; stamens basal.”
— [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 |
|---|---|---|---|---|---|---|---|
| 14 | A Study of Northwestern Apples | unknown | 7 | 0 | 0 | p80 | Cavity deep, regular, acute; small radiating patch of russet at base; basin abrupt with small protuberances around eye; calyx closed, segments connivent.; August, September.; Flesh white, sprightly acid, good.; Greenish |
| Document | Page | Claim Type | Claim | Quote | Match |
|---|---|---|---|---|---|
| 14 | p80 | description_snippet | Cavity deep, regular, acute; small radiating patch of russet at base; basin abrupt with small protuberances around eye; calyx closed, segments connivent. | Oldenburg, Duchess of—... This well known Russian variety is the hardiest of the old list; its endurance of severe winters encouraged the importation of other sorts from Russia—Fruit large, roundish oblate, regular; ... | page_block:0.90 |
| 14 | p80 | storage_duration | August, September. | Oldenburg, Duchess of—... This well known Russian variety is the hardiest of the old list; its endurance of severe winters encouraged the importation of other sorts from Russia—Fruit large, roundish oblate, regular; ... | page_block:0.90 |
| 14 | p80 | flavor_profile | Flesh white, sprightly acid, good. | Oldenburg, Duchess of—... This well known Russian variety is the hardiest of the old list; its endurance of severe winters encouraged the importation of other sorts from Russia—Fruit large, roundish oblate, regular; ... | page_block:0.90 |
| 14 | p80 | fruit_color | Greenish yellow with stripes and splashes, mixed with crimson on sunny side. | Oldenburg, Duchess of—... This well known Russian variety is the hardiest of the old list; its endurance of severe winters encouraged the importation of other sorts from Russia—Fruit large, roundish oblate, regular; ... | page_block:0.90 |
| 14 | p80 | fruit_size | Fruit large, roundish oblate, regular. | Oldenburg, Duchess of—... This well known Russian variety is the hardiest of the old list; its endurance of severe winters encouraged the importation of other sorts from Russia—Fruit large, roundish oblate, regular; ... | page_block:0.90 |
| 14 | p80 | entry_hardiness_observation | Noted as one of the hardiest of the old list, and its hardiness was tied to Russian import interest. | Oldenburg, Duchess of—... This well known Russian variety is the hardiest of the old list; its endurance of severe winters encouraged the importation of other sorts from Russia—Fruit large, roundish oblate, regular; ... | page_block:0.90 |
| 14 | p80 | selection_origin_reference | Described as a Russian variety; linked to frontispiece and Duchess group synonymy context. | Oldenburg, Duchess of—... This well known Russian variety is the hardiest of the old list; its endurance of severe winters encouraged the importation of other sorts from Russia—Fruit large, roundish oblate, regular; ... | 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 |
|---|---|---|
| description_snippet | Cavity deep, regular, acute; small radiating patch of russet at base; basin abrupt with small protuberances around eye; calyx closed, segments connivent. | 0.86 |
| storage_duration | August, September. | 0.93 |
| flavor_profile | Flesh white, sprightly acid, good. | 0.89 |
| fruit_color | Greenish yellow with stripes and splashes, mixed with crimson on sunny side. | 0.90 |
| fruit_size | Fruit large, roundish oblate, regular. | 0.95 |
| entry_hardiness_observation | Noted as one of the hardiest of the old list, and its hardiness was tied to Russian import interest. | 0.92 |
| selection_origin_reference | Described as a Russian variety; linked to frontispiece and Duchess group synonymy context. | 0.90 |
| ID | Type | Year | Label |
|---|---|---|---|
| No history events. | |||