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: 15 | History events: 0 | Catalog issue offerings: 0
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Evidence Badge: emerging | claims=15 | sources=1 | contradictions=0
Claim Types: description_snippet:3, flavor_profile:2, fruit_size:2, storage_duration:2, anecdote_snippet:1, fruit_color:1, selection_origin_reference:1 | Open evidence summary JSON | Open citation drawer JSON
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Ostrakavis is an apple seedling described in N. E. Hansen's 1902 bulletin A Study of Northwestern Apples. Hansen gives its parentage as Ostrakoff x Ben Davis. He says it was one of several seedlings from that cross raised at the Iowa Experiment Station about 1888. [S1]
The name was proposed because it suggested the parentage, if the variety proved worth propagating. Hansen also noted that the cross was interesting because two sour apples had produced a sweet apple. [S1]
The fruit is medium size or smaller, conical, and regular. The skin is oily yellow with a faint bronze blush. The cavity is deep and regular, with a slight trace of russet. The basin is wide, very shallow, and minutely wrinkled. The flesh is white and sweet. [S1]
Its season is probably late fall or early winter. The same bulletin's diagnostic list also places Ostrakavis among sweet fleshed, conical apples with an oily surface in a midsummer to early winter section. [S1]
The available source gives no direct hardiness zone or winter survival statement for Ostrakavis. Its northern fruit relevance comes from the bulletin context. Hansen was cataloging apples for the northwestern United States, with attention to hardy and Russian associated material. [S1]
The evidence supports direct parentage from Ostrakoff and Ben Davis. The source does not give later breeding use, descendants, disease notes, tree habit, productivity, or storage duration beyond the probable late fall or early winter season. [S1]
Summary source basis
This summary currently draws chiefly from A Study of Northwestern Apples.
Featured source descriptions
“One out of several seedlings of the same parentage originated at Iowa Experiment Station about 1888.”
— [1]
“Core wide open, meeting; cells large, roomy, ovate, slit; tube funnel-shaped; stamens median; seeds twelve, large, plump.”
— [1]
“Cavity regular, deep, obtuse, with faint trace of russet; basin wide, very shallow, minutely wrinkled.”
— [1]
“Flesh white, sweet.”
— [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 | 15 | 0 | 0 | p80 p81 p138 | Fruit shape noted as conical with oily surface.; Fruit morphology includes conical, regular form; medium or below size; cavity and basin characteristics and seed count are described in the entry.; Text remarks that this |
| Document | Page | Claim Type | Claim | Quote | Match |
|---|---|---|---|---|---|
| 14 | p138 | description_snippet | Fruit shape noted as conical with oily surface. | conical, surface oily .... ... .... Ostrakavis | page_block:0.90 |
| 14 | p81 | description_snippet | Fruit morphology includes conical, regular form; medium or below size; cavity and basin characteristics and seed count are described in the entry. | Ostrakavis (Ostrakoff X Ben Davis)- One out of several seedlings ... originated at Iowa Experiment Station about 1888. ... cross of two sour apples may produce a sweet apple. Fruit medium or below, conical, regular; ... | page_block:0.90 |
| 14 | p81 | anecdote_snippet | Text remarks that this is interesting because a cross of two sour apples may produce a sweet apple. | Ostrakavis (Ostrakoff X Ben Davis)- One out of several seedlings ... originated at Iowa Experiment Station about 1888. ... cross of two sour apples may produce a sweet apple. Fruit medium or below, conical, regular; ... | page_block:0.90 |
| 14 | p81 | storage_duration | Season noted as probably late fall or early winter. | Ostrakavis (Ostrakoff X Ben Davis)- One out of several seedlings ... originated at Iowa Experiment Station about 1888. ... cross of two sour apples may produce a sweet apple. Fruit medium or below, conical, regular; ... | page_block:0.90 |
| 14 | p81 | flavor_profile | Flesh stated as white and sweet. | Ostrakavis (Ostrakoff X Ben Davis)- One out of several seedlings ... originated at Iowa Experiment Station about 1888. ... cross of two sour apples may produce a sweet apple. Fruit medium or below, conical, regular; ... | page_block:0.90 |
| 14 | p81 | fruit_size | Described as medium or below in size. | Ostrakavis (Ostrakoff X Ben Davis)- One out of several seedlings ... originated at Iowa Experiment Station about 1888. ... cross of two sour apples may produce a sweet apple. Fruit medium or below, conical, regular; ... | page_block:0.90 |
| 14 | p81 | selection_origin_reference | One of several seedlings from this parentage originated at Iowa Experiment Station around 1888. | Ostrakavis (Ostrakoff X Ben Davis)- One out of several seedlings ... originated at Iowa Experiment Station about 1888. ... cross of two sour apples may produce a sweet apple. Fruit medium or below, conical, regular; ... | page_block:0.90 |
| 14 | p81 | entry_pedigree | Explicit parentage is given as Ostrakoff x Ben Davis. | Ostrakavis (Ostrakoff X Ben Davis)- One out of several seedlings ... originated at Iowa Experiment Station about 1888. ... cross of two sour apples may produce a sweet apple. Fruit medium or below, conical, regular; ... | page_block:0.90 |
| 14 | p80 | description_snippet | Cone shape regular; tube funnel-shaped; seeds described as numerous and plump in broader continuation context. | Ostrakavis (Ostrakojj X Ben Davis)—One out of several seedlings of same parentage originated at Iowa Experiment Station about 1888. ... interesting as showing that a cross of two sour apples may produce a sweet apple. | page_block:0.90 |
| 14 | p80 | storage_duration | Season probably late fall or early winter. | Ostrakavis (Ostrakojj X Ben Davis)—One out of several seedlings of same parentage originated at Iowa Experiment Station about 1888. ... interesting as showing that a cross of two sour apples may produce a sweet apple. | page_block:0.90 |
| 14 | p80 | flavor_profile | Flesh is sweet. | Ostrakavis (Ostrakojj X Ben Davis)—One out of several seedlings of same parentage originated at Iowa Experiment Station about 1888. ... interesting as showing that a cross of two sour apples may produce a sweet apple. | page_block:0.90 |
| 14 | p80 | fruit_color | Surface oily, yellow with faint bronze blush. | Ostrakavis (Ostrakojj X Ben Davis)—One out of several seedlings of same parentage originated at Iowa Experiment Station about 1888. ... interesting as showing that a cross of two sour apples may produce a sweet apple. | page_block:0.90 |
| 14 | p80 | fruit_size | Fruit medium or below, conical, regular. | Ostrakavis (Ostrakojj X Ben Davis)—One out of several seedlings of same parentage originated at Iowa Experiment Station about 1888. ... interesting as showing that a cross of two sour apples may produce a sweet apple. | page_block:0.90 |
| 14 | p80 | entry_location | Originated at the Iowa Experiment Station around 1888. | Ostrakavis (Ostrakojj X Ben Davis)—One out of several seedlings of same parentage originated at Iowa Experiment Station about 1888. ... interesting as showing that a cross of two sour apples may produce a sweet apple. | page_block:0.90 |
| 14 | p80 | entry_pedigree | Hybrid basis: Ostrakojj x Ben Davis. | Ostrakavis (Ostrakojj X Ben Davis)—One out of several seedlings of same parentage originated at Iowa Experiment Station about 1888. ... interesting as showing that a cross of two sour apples may produce a sweet apple. | 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 | Fruit shape noted as conical with oily surface. | 0.74 |
| description_snippet | Fruit morphology includes conical, regular form; medium or below size; cavity and basin characteristics and seed count are described in the entry. | 0.88 |
| anecdote_snippet | Text remarks that this is interesting because a cross of two sour apples may produce a sweet apple. | 0.92 |
| storage_duration | Season noted as probably late fall or early winter. | 0.90 |
| flavor_profile | Flesh stated as white and sweet. | 0.93 |
| fruit_size | Described as medium or below in size. | 0.93 |
| selection_origin_reference | One of several seedlings from this parentage originated at Iowa Experiment Station around 1888. | 0.92 |
| entry_pedigree | Explicit parentage is given as Ostrakoff x Ben Davis. | 0.98 |
| description_snippet | Cone shape regular; tube funnel-shaped; seeds described as numerous and plump in broader continuation context. | 0.74 |
| storage_duration | Season probably late fall or early winter. | 0.91 |
| flavor_profile | Flesh is sweet. | 0.93 |
| fruit_color | Surface oily, yellow with faint bronze blush. | 0.86 |
| fruit_size | Fruit medium or below, conical, regular. | 0.88 |
| entry_location | Originated at the Iowa Experiment Station around 1888. | 0.94 |
| entry_pedigree | Hybrid basis: Ostrakojj x Ben Davis. | 0.97 |
| ID | Type | Year | Label |
|---|---|---|---|
| No history events. | |||