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: 28 | History events: 0 | Catalog issue offerings: 0
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Evidence Badge: emerging | claims=28 | sources=2 | contradictions=0
Claim Types: description_snippet:4, source_reference_abbreviation:4, fruit_color:3, fruit_size:3, selection_origin_reference:3, flavor_profile:2, storage_duration:2, anecdote_snippet:1, growth_habit:1, keeping_quality:1, recommendation_context:1, taxon_context:1 | Open evidence summary JSON | Open citation drawer JSON
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Ostrakoff is listed as a standard apple of Russian origin. The fruit is described as about 6 cm across, pale yellow, and lightly blushed crimson or carmine. Quality is rated poor. [S1]
The cultivar was tested at Rosthern in the 1930s. The entry also points to older references abbreviated as PSM and Lau or L&U; PSM is expanded here as a note that it was shown at the 1901 Provincial Show in Morden, Manitoba, while the other abbreviation is left unclear in the source material. [S1]
Summary source basis
This summary currently draws chiefly from A Study of Northwestern Apples, with 2 additional supporting sources linked below.
Featured source descriptions
“Referenced in PSM and L&U.”
— [2]
“Russian origin.”
— [2]
“Ostrakoff is one of ten varieties for which descriptions were adopted because of special attention in the northwest.”
— [1]
“Marked as spurious.”
— [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 | 19 | 0 | 0 | p80 p81 p139 | Descriptors on this row indicate the floral tube is conical and the stem is long to very long for Ostrakoff.; Entry includes source-style note '(Rus. No. m.)'.; Open cavity, long thin stem, shallow wrinkled basin, closed |
| 3 | Edible Apples in Prairie Canada | unknown | 9 | 0 | 0 | p52 | References cited: PSM (Shown at the 1901 Provincial Show, Morden MB.).; Listed as a standard apple (standard apple, fruit 5 cm diameter or more).; References cited: PSM and Lau.; Tested at Rosthern in the 1930s. |
| Document | Page | Claim Type | Claim | Quote | Match |
|---|---|---|---|---|---|
| 14 | p139 | description_snippet | Descriptors on this row indicate the floral tube is conical and the stem is long to very long for Ostrakoff. | Tube conical ... Stem long to very long ... Ostrakoff | page_block:0.90 |
| 14 | p81 | source_reference_abbreviation | Entry includes source-style note '(Rus. No. m.)'. | O STRAKOFF. ... Size, 5; form, round; color, yellowish green, shaded brown on sun side, many grayish spots, often covered with blackish fungus spots; ... stem, long, thin; basin, shallow, wrinkled; ... flesh, yellowish w | page_block:0.90 |
| 14 | p81 | description_snippet | Open cavity, long thin stem, shallow wrinkled basin, closed half-open calyx orientation, and associated shape/epidermis descriptors are all provided in the entry. | O STRAKOFF. ... Size, 5; form, round; color, yellowish green, shaded brown on sun side, many grayish spots, often covered with blackish fungus spots; ... stem, long, thin; basin, shallow, wrinkled; ... flesh, yellowish w | page_block:0.90 |
| 14 | p81 | recommendation_context | Tree noted as vigorous; subject to blight; reported to perform best on high limestone and clay soils. | O STRAKOFF. ... Size, 5; form, round; color, yellowish green, shaded brown on sun side, many grayish spots, often covered with blackish fungus spots; ... stem, long, thin; basin, shallow, wrinkled; ... flesh, yellowish w | page_block:0.90 |
| 14 | p81 | selection_origin_reference | Rustic source designation appears as 'Rus. No. m.' with Russian origin context. | O STRAKOFF. ... Size, 5; form, round; color, yellowish green, shaded brown on sun side, many grayish spots, often covered with blackish fungus spots; ... stem, long, thin; basin, shallow, wrinkled; ... flesh, yellowish w | page_block:0.90 |
| 14 | p81 | entry_location | Origin given as Russia. | O STRAKOFF. ... Size, 5; form, round; color, yellowish green, shaded brown on sun side, many grayish spots, often covered with blackish fungus spots; ... stem, long, thin; basin, shallow, wrinkled; ... flesh, yellowish w | page_block:0.90 |
| 14 | p81 | storage_duration | Noted season is early winter. | O STRAKOFF. ... Size, 5; form, round; color, yellowish green, shaded brown on sun side, many grayish spots, often covered with blackish fungus spots; ... stem, long, thin; basin, shallow, wrinkled; ... flesh, yellowish w | page_block:0.90 |
| 14 | p81 | flavor_profile | Flesh is yellowish white and fine, with subacid flavor. | O STRAKOFF. ... Size, 5; form, round; color, yellowish green, shaded brown on sun side, many grayish spots, often covered with blackish fungus spots; ... stem, long, thin; basin, shallow, wrinkled; ... flesh, yellowish w | page_block:0.90 |
| 14 | p81 | fruit_color | Fruit described as round, yellowish green, and shaded brown on the sun side; with grayish and blackish spots. | O STRAKOFF. ... Size, 5; form, round; color, yellowish green, shaded brown on sun side, many grayish spots, often covered with blackish fungus spots; ... stem, long, thin; basin, shallow, wrinkled; ... flesh, yellowish w | page_block:0.90 |
| 14 | p81 | fruit_size | Described with a size code of 5. | O STRAKOFF. ... Size, 5; form, round; color, yellowish green, shaded brown on sun side, many grayish spots, often covered with blackish fungus spots; ... stem, long, thin; basin, shallow, wrinkled; ... flesh, yellowish w | page_block:0.90 |
| 14 | p80 | description_snippet | Cavity regular acute; stem very long; basin narrow, shallow, corrugated; calyx half open; flesh yellowish white, fine; core/seed/structure details omitted here due page truncation. | OSTRAKOFF. DESCRIPTION: Ostrakojj (4 M)-... season, early winter; origin, Russia; tree, a vigorous grower. subject to blight, does best on high limestone and clay soils. (Rus. No m. Com.) | page_block:0.90 |
| 14 | p80 | source_reference_abbreviation | “Rus. No m. Com.” is cited as the source abbreviation for this entry. | OSTRAKOFF. DESCRIPTION: Ostrakojj (4 M)-... season, early winter; origin, Russia; tree, a vigorous grower. subject to blight, does best on high limestone and clay soils. (Rus. No m. Com.) | page_block:0.90 |
| 14 | p80 | anecdote_snippet | Noted as subject to blight. | OSTRAKOFF. DESCRIPTION: Ostrakojj (4 M)-... season, early winter; origin, Russia; tree, a vigorous grower. subject to blight, does best on high limestone and clay soils. (Rus. No m. Com.) | page_block:0.90 |
| 14 | p80 | growth_habit | Tree described as a vigorous grower; best performance on high limestone and clay soils. | OSTRAKOFF. DESCRIPTION: Ostrakojj (4 M)-... season, early winter; origin, Russia; tree, a vigorous grower. subject to blight, does best on high limestone and clay soils. (Rus. No m. Com.) | page_block:0.90 |
| 14 | p80 | storage_duration | Early winter. | OSTRAKOFF. DESCRIPTION: Ostrakojj (4 M)-... season, early winter; origin, Russia; tree, a vigorous grower. subject to blight, does best on high limestone and clay soils. (Rus. No m. Com.) | page_block:0.90 |
| 14 | p80 | flavor_profile | Flavor is subacid. | OSTRAKOFF. DESCRIPTION: Ostrakojj (4 M)-... season, early winter; origin, Russia; tree, a vigorous grower. subject to blight, does best on high limestone and clay soils. (Rus. No m. Com.) | page_block:0.90 |
| 14 | p80 | fruit_color | Surface yellow approaching white, with white minute suffused dots, obscure. | OSTRAKOFF. DESCRIPTION: Ostrakojj (4 M)-... season, early winter; origin, Russia; tree, a vigorous grower. subject to blight, does best on high limestone and clay soils. (Rus. No m. Com.) | page_block:0.90 |
| 14 | p80 | fruit_size | Fruit medium or above; round, slightly conical, unequal. | OSTRAKOFF. DESCRIPTION: Ostrakojj (4 M)-... season, early winter; origin, Russia; tree, a vigorous grower. subject to blight, does best on high limestone and clay soils. (Rus. No m. Com.) | page_block:0.90 |
| 14 | p80 | selection_origin_reference | Origin noted as Russia. | OSTRAKOFF. DESCRIPTION: Ostrakojj (4 M)-... season, early winter; origin, Russia; tree, a vigorous grower. subject to blight, does best on high limestone and clay soils. (Rus. No m. Com.) | page_block:0.90 |
| 3 | p52 | source_reference_abbreviation | References cited: PSM (Shown at the 1901 Provincial Show, Morden MB.). | Ostrakoff (Russian origin) ST Fruit 6cm, pale yellow. Lightly blushed crimson. Poor quality. Rosthern tested 1930s. Ref PSM, Lau. | page_block:0.90 |
| 3 | p52 | description_snippet | Listed as a standard apple (standard apple, fruit 5 cm diameter or more). | Ostrakoff (Russian origin) ST Fruit 6cm, pale yellow. Lightly blushed crimson. Poor quality. Rosthern tested 1930s. Ref PSM, Lau. | page_block:0.90 |
| 3 | p52 | source_reference_abbreviation | References cited: PSM and Lau. | Ostrakoff (Russian origin) ST Fruit 6cm, pale yellow. Lightly blushed crimson. Poor quality. Rosthern tested 1930s. Ref PSM, Lau. | page_block:0.90 |
| 3 | p52 | entry_location | Tested at Rosthern in the 1930s. | Ostrakoff (Russian origin) ST Fruit 6cm, pale yellow. Lightly blushed crimson. Poor quality. Rosthern tested 1930s. Ref PSM, Lau. | page_block:0.90 |
| 3 | p52 | keeping_quality | Quality described as poor. | Ostrakoff (Russian origin) ST Fruit 6cm, pale yellow. Lightly blushed crimson. Poor quality. Rosthern tested 1930s. Ref PSM, Lau. | page_block:0.90 |
| 3 | p52 | fruit_color | Fruit pale yellow, lightly blushed crimson. | Ostrakoff (Russian origin) ST Fruit 6cm, pale yellow. Lightly blushed crimson. Poor quality. Rosthern tested 1930s. Ref PSM, Lau. | page_block:0.90 |
| 3 | p52 | fruit_size | Fruit about 6 cm. | Ostrakoff (Russian origin) ST Fruit 6cm, pale yellow. Lightly blushed crimson. Poor quality. Rosthern tested 1930s. Ref PSM, Lau. | page_block:0.90 |
| 3 | p52 | taxon_context | Marked ST, expanded as standard apple with fruit 5 cm diameter or more. | Ostrakoff (Russian origin) ST Fruit 6cm, pale yellow. Lightly blushed crimson. Poor quality. Rosthern tested 1930s. Ref PSM, Lau. | page_block:0.90 |
| 3 | p52 | selection_origin_reference | Listed as of Russian origin. | Ostrakoff (Russian origin) ST Fruit 6cm, pale yellow. Lightly blushed crimson. Poor quality. Rosthern tested 1930s. Ref PSM, Lau. | 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 | Descriptors on this row indicate the floral tube is conical and the stem is long to very long for Ostrakoff. | 0.84 |
| source_reference_abbreviation | Entry includes source-style note '(Rus. No. m.)'. | 0.81 |
| description_snippet | Open cavity, long thin stem, shallow wrinkled basin, closed half-open calyx orientation, and associated shape/epidermis descriptors are all provided in the entry. | 0.90 |
| recommendation_context | Tree noted as vigorous; subject to blight; reported to perform best on high limestone and clay soils. | 0.94 |
| selection_origin_reference | Rustic source designation appears as 'Rus. No. m.' with Russian origin context. | 0.74 |
| entry_location | Origin given as Russia. | 0.98 |
| storage_duration | Noted season is early winter. | 0.96 |
| flavor_profile | Flesh is yellowish white and fine, with subacid flavor. | 0.97 |
| fruit_color | Fruit described as round, yellowish green, and shaded brown on the sun side; with grayish and blackish spots. | 0.95 |
| fruit_size | Described with a size code of 5. | 0.96 |
| description_snippet | Cavity regular acute; stem very long; basin narrow, shallow, corrugated; calyx half open; flesh yellowish white, fine; core/seed/structure details omitted here due page truncation. | 0.72 |
| source_reference_abbreviation | “Rus. No m. Com.” is cited as the source abbreviation for this entry. | 0.78 |
| anecdote_snippet | Noted as subject to blight. | 0.92 |
| growth_habit | Tree described as a vigorous grower; best performance on high limestone and clay soils. | 0.85 |
| storage_duration | Early winter. | 0.94 |
| flavor_profile | Flavor is subacid. | 0.91 |
| fruit_color | Surface yellow approaching white, with white minute suffused dots, obscure. | 0.88 |
| fruit_size | Fruit medium or above; round, slightly conical, unequal. | 0.89 |
| selection_origin_reference | Origin noted as Russia. | 0.97 |
| source_reference_abbreviation | References cited: PSM (Shown at the 1901 Provincial Show, Morden MB.). | 0.93 |
| description_snippet | Listed as a standard apple (standard apple, fruit 5 cm diameter or more). | 0.96 |
| source_reference_abbreviation | References cited: PSM and Lau. | 0.86 |
| entry_location | Tested at Rosthern in the 1930s. | 0.92 |
| keeping_quality | Quality described as poor. | 0.94 |
| fruit_color | Fruit pale yellow, lightly blushed crimson. | 0.95 |
| fruit_size | Fruit about 6 cm. | 0.96 |
| taxon_context | Marked ST, expanded as standard apple with fruit 5 cm diameter or more. | 0.98 |
| selection_origin_reference | Listed as of Russian origin. | 0.96 |
| ID | Type | Year | Label |
|---|---|---|---|
| No history events. | |||