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: 8 | History events: 0 | Catalog issue offerings: 0
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Evidence Badge: emerging | claims=8 | sources=1 | contradictions=0
Claim Types: description_snippet:1, fruit_color:1, fruit_size:1, keeping_quality:1, productivity:1, selection_origin_reference:1, taxon_context:1 | Open evidence summary JSON | Open citation drawer JSON
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Rosthern #18 is listed as a Rosthern selection dated 1936, and its parentage is not given in the source.[S1] It is marked CR, meaning it is a crabapple or applecrab type, with fruit about 4 cm (under 5 cm) that are yellow and mostly covered with scarlet.[S1]
The entry notes a low yield and says the fruit keeps well from September to December.[S1] It also indicates the cultivar was tested at the University of Saskatchewan.[S1]
Summary source basis
This summary currently draws chiefly from Rosthern, with 1 additional supporting sources linked below.
Featured source descriptions
“Originated with the Rosthern Experimental Farm, Saskatchewan, Agriculture Canada, selected in 1936 and tested under this name but never officially released for commerce.”
— [2]
“Fruit 4 cm, yellow, mostly covered with scarlet; low yield but keeps well, Sept-Dec.”
— [2]
“Tested at U Sask.”
— [2]
“It is hardy to Zone 2a, and resistant to fire blight.”
— [2]
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 |
|---|---|---|---|---|---|---|---|
| 3 | Edible Apples in Prairie Canada | unknown | 8 | 0 | 0 | p62 | Listed as a crabapple (crabapple or applecrab, fruit less than 5 cm diameter).; Tested at the University of Saskatchewan.; Keeps well from September to December.; Low yield. |
| Document | Page | Claim Type | Claim | Quote | Match |
|---|---|---|---|---|---|
| 3 | p62 | description_snippet | Listed as a crabapple (crabapple or applecrab, fruit less than 5 cm diameter). | Rosthern #18 (unknown) ... Rosthern (1936) ... CR ... Fruit 4 cm yellow, mostly covered with scarlet. Low yield but keeps well, Sept-Dec. Tested at U Sask. | page_block:0.90 |
| 3 | p62 | entry_location | Tested at the University of Saskatchewan. | Rosthern #18 (unknown) ... Rosthern (1936) ... CR ... Fruit 4 cm yellow, mostly covered with scarlet. Low yield but keeps well, Sept-Dec. Tested at U Sask. | page_block:0.90 |
| 3 | p62 | keeping_quality | Keeps well from September to December. | Rosthern #18 (unknown) ... Rosthern (1936) ... CR ... Fruit 4 cm yellow, mostly covered with scarlet. Low yield but keeps well, Sept-Dec. Tested at U Sask. | page_block:0.90 |
| 3 | p62 | productivity | Low yield. | Rosthern #18 (unknown) ... Rosthern (1936) ... CR ... Fruit 4 cm yellow, mostly covered with scarlet. Low yield but keeps well, Sept-Dec. Tested at U Sask. | page_block:0.90 |
| 3 | p62 | fruit_color | Fruit yellow and mostly covered with scarlet. | Rosthern #18 (unknown) ... Rosthern (1936) ... CR ... Fruit 4 cm yellow, mostly covered with scarlet. Low yield but keeps well, Sept-Dec. Tested at U Sask. | page_block:0.90 |
| 3 | p62 | fruit_size | Fruit about 4 cm. | Rosthern #18 (unknown) ... Rosthern (1936) ... CR ... Fruit 4 cm yellow, mostly covered with scarlet. Low yield but keeps well, Sept-Dec. Tested at U Sask. | page_block:0.90 |
| 3 | p62 | taxon_context | Marked CR, meaning crabapple or applecrab. | Rosthern #18 (unknown) ... Rosthern (1936) ... CR ... Fruit 4 cm yellow, mostly covered with scarlet. Low yield but keeps well, Sept-Dec. Tested at U Sask. | page_block:0.90 |
| 3 | p62 | selection_origin_reference | Listed as a Rosthern selection dated 1936. | Rosthern #18 (unknown) ... Rosthern (1936) ... CR ... Fruit 4 cm yellow, mostly covered with scarlet. Low yield but keeps well, Sept-Dec. Tested at U Sask. | 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 | Listed as a crabapple (crabapple or applecrab, fruit less than 5 cm diameter). | 0.96 |
| entry_location | Tested at the University of Saskatchewan. | 0.89 |
| keeping_quality | Keeps well from September to December. | 0.91 |
| productivity | Low yield. | 0.93 |
| fruit_color | Fruit yellow and mostly covered with scarlet. | 0.96 |
| fruit_size | Fruit about 4 cm. | 0.96 |
| taxon_context | Marked CR, meaning crabapple or applecrab. | 0.98 |
| selection_origin_reference | Listed as a Rosthern selection dated 1936. | 0.92 |
| ID | Type | Year | Label |
|---|---|---|---|
| No history events. | |||