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: 33 | History events: 0 | Catalog issue offerings: 0
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Evidence Badge: emerging | claims=33 | sources=2 | contradictions=0
Claim Types: description_snippet:17, taxon_context:3, release_year_reference:2, source_reference_abbreviation:2, storage_duration:2, recommendation_context:1, selection_origin_reference:1 | Open evidence summary JSON | Open citation drawer JSON
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Mount Royal is listed as a plum cultivar, Prunus domestica 'Mount Royal', with species context given as P. domestica L. [S1]
The University of Minnesota material gives its introduction year as about 1900 and cites Andersen and Weir, 1967 as a source reference. [S1]
In pollen stainability testing, Mount Royal had an initial value of 98% and remained above 50% throughout the experiment, though the table also notes significant but inconsistent variation within the cultivar. The source suggests high stainability may indicate usefulness in breeding crosses. [S1]
In later plum seedling experiments, Mount Royal appeared at the low end for germination: 0.0% in one field experiment and 4.2% after 25 months of seed storage. In Experiment III, its seedlings had 89% greenhouse survival and 100% field survival at the end of the trial, with reported measurements including 8.5 cm initial height and 1.90 mm initial stem diameter. [S1]
Summary source basis
This summary currently draws chiefly from Minnesota #1695, with 3 additional supporting sources linked below.
Featured source descriptions
“Fruit form is round, with a russeted depressed apex and small pistil point; cavity small and deep; suture continuous and furrowed at cavity end.”
— [4]
“The tree is susceptible to leaf spot, blooms early May, and ripens early September.”
— [4]
“It is described as one of the hardiest and most reliable of P. domestica plums, though it had some winterkilling in test winters.”
— [4]
“Flesh is melting and moderately juicy; flavor is excellent.”
— [4]
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 |
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| No explicit zone assertion rows yet. | ||||||
No linked media assets.
| Document | Title/URL | Rights | Claims | Relationships | History Events | Pages | Snippets |
|---|---|---|---|---|---|---|---|
| 7 | Minnesota #1695 | unknown | 31 | 0 | 0 | p46 p47 p48 p49 p50 p71 p83 p86 | This row is formatted as a sequence of percentage values paired with letter-class annotations used across the table, matching the Table 2 storage comparison format.; For 'Mount Royal' in Table 2: Initial (0 months) 98% ( |
| 112 | Pollination Studies with Stone Fruits | unknown | 2 | 0 | 0 | p6 | Table 10 shows good fertility/compatibility ratings in the displayed matrix.; Table 10 identifies Mount Royal as Prunus domestica. |
| Document | Page | Claim Type | Claim | Quote | Match |
|---|---|---|---|---|---|
| 7 | p123 | description_snippet | This row is formatted as a sequence of percentage values paired with letter-class annotations used across the table, matching the Table 2 storage comparison format. | 'Mount Royal' 98% A 94% A-C 98% A 93% B-F 88% A-F 90% AB 92% A-D 93% A-C 93% A-D 91% A-D | page_block:0.90 |
| 7 | p123 | storage_duration | For 'Mount Royal' in Table 2: Initial (0 months) 98% (A), 1 month 94% (A-C), 2 months 98% (A), 3 months 93% (B-F), 4 months 88% (A-F), 5 months 90% (AB), 6 months 92% (A-D), 7 mont | 'Mount Royal' 98% A 94% A-C 98% A 93% B-F 88% A-F 90% AB 92% A-D 93% A-C 93% A-D 91% A-D | page_block:0.90 |
| 7 | p118 | source_reference_abbreviation | Source citation given as Andersen and Weir, 1967. | P. domestica L. 'Mount Royal' ~1900 Week 18 Andersen and Weir, 1967 | page_block:0.90 |
| 7 | p118 | release_year_reference | Introduction year is approximately 1900 (~1900). | P. domestica L. 'Mount Royal' ~1900 Week 18 Andersen and Weir, 1967 | page_block:0.90 |
| 7 | p118 | entry_pedigree | Species context is P. domestica L. | P. domestica L. 'Mount Royal' ~1900 Week 18 Andersen and Weir, 1967 | page_block:0.90 |
| 7 | p109 | recommendation_context | High stainability implies potential usefulness in breeding crosses. | P. domestica 'Mount Royal' had high % stainability. Even though 'Compass', 'Mount Royal', and 'Suda' have been around for more than a century, % stainability was >50% throughout this experiment. | page_block:0.90 |
| 7 | p109 | entry_hardiness_observation | Maintained >50% pollen stainability throughout the experiment. | P. domestica 'Mount Royal' had high % stainability. Even though 'Compass', 'Mount Royal', and 'Suda' have been around for more than a century, % stainability was >50% throughout this experiment. | page_block:0.90 |
| 7 | p109 | release_year_reference | Cultivar has been present for more than a century according to page context. | P. domestica 'Mount Royal' had high % stainability. Even though 'Compass', 'Mount Royal', and 'Suda' have been around for more than a century, % stainability was >50% throughout this experiment. | page_block:0.90 |
| 7 | p109 | description_snippet | 'Mount Royal' showed high pollen stainability. | P. domestica 'Mount Royal' had high % stainability. Even though 'Compass', 'Mount Royal', and 'Suda' have been around for more than a century, % stainability was >50% throughout this experiment. | page_block:0.90 |
| 7 | p108 | entry_hardiness_observation | There was some significant but inconsistent variation within Mount Royal in Table 2 pollen stainability data. | There was some significant but inconsistent variation within 'Mount Royal' and 'Gracious' (Table 2). | page_block:0.90 |
| 7 | p107 | description_snippet | Mount Royal was included in the set where Superior and La Crescent were reported as significantly different from it. | Toka differed significantly from South Dakota followed by Mount Royal with Superior’ and La Crescent’ was also significantly different than Mount Royal (Table 2). | page_block:0.90 |
| 7 | p106 | description_snippet | Initial plum stainability was expressed as a range on this page from 81% (Toka) to 98% (Mount Royal), with significant effects reported in surrounding text. | Initial % stainability for plums ranged from 81% for 'Toka' to 98% for 'Mount Royal' with significant... | page_block:0.90 |
| 7 | p106 | description_snippet | Mount Royal had initial pollen stainability of 98% in the plum cultivar set. | Initial % stainability for plums ranged from 81% for 'Toka' to 98% for 'Mount Royal' with significant... | page_block:0.90 |
| 7 | p97 | entry_hardiness_observation | For 'Mount Royal', percent survival was 89 in greenhouse (Grhs.) and 100 in field at the end of Experiment III. | Plum 'Mount Royal' 89 100 | page_block:0.90 |
| 7 | p93 | description_snippet | Herbivore rating reported as 4.5 (Tukey grouping marker ab). | Plum ... P. domestica 'Mount Royal' 4.5 ab | page_block:0.90 |
| 7 | p93 | taxon_context | Listed in the Plum section as Prunus domestica 'Mount Royal'. | Plum ... P. domestica 'Mount Royal' 4.5 ab | page_block:0.90 |
| 7 | p91 | description_snippet | Table values indicate initial height 8.5 cm, initial stem diameter 1.90 mm, change in stem diameter 0.83 mm, and ΔTCA 3.18 mm². | P. domestica 'Mount Royal' 8.5 d 1.90 ab 0.83 b 3.18 b | page_block:0.90 |
| 7 | p91 | taxon_context | Cultivar listed as plum, Prunus domestica 'Mount Royal'. | P. domestica 'Mount Royal' 8.5 d 1.90 ab 0.83 b 3.18 b | page_block:0.90 |
| 7 | p88 | source_reference_abbreviation | Part of Table 6 female-parent greenhouse replication continuation. | P. domestica ‘Mount Royal’ 60.7 ab 6.88 a 1.33 9.69 | page_block:0.90 |
| 7 | p88 | description_snippet | Prunus domestica 'Mount Royal' has greenhouse values of 60.7 ab, 6.88 a, 1.33, and 9.69 for the listed replication parameters. | P. domestica ‘Mount Royal’ 60.7 ab 6.88 a 1.33 9.69 | page_block:0.90 |
| 7 | p86 | description_snippet | Included as a plum cultivar entry in Table 5 (continued). | Table 5: Continued ... 'Mount Royal' 4.2 d 16.7 ab | page_block:0.90 |
| 7 | p86 | storage_duration | Plum 'Mount Royal' field germination was 4.2% at 25 months and 16.7% at 1 month (Table 5). | Table 5: Continued ... 'Mount Royal' 4.2 d 16.7 ab | page_block:0.90 |
| 7 | p83 | description_snippet | Plum 'Mount Royal' records 16.7% non-scarified and 29.2% scarified germination, with average weeks 1.8 and 1.2. | Plum 'Mount Royal' 16.7 cde 29.2 1.8 1.2 | page_block:0.90 |
| 7 | p71 | description_snippet | Seed-year year columns show x values, with greenhouse/field replications of 7 and 5. | P. domestica L. ‘Mount Royal' HRC & UMN x x 7 5 | page_block:0.90 |
| 7 | p71 | selection_origin_reference | Collection locations are listed as HRC and UMN. | P. domestica L. ‘Mount Royal' HRC & UMN x x 7 5 | page_block:0.90 |
| 7 | p50 | description_snippet | Greenhouse survival at the end of Experiment III was reported as 89% for Mount Royal seedlings (Table 10). | At the end of Experiment III, % survival among plum seedlings started in the greenhouse ranged from 33% for seedlings from Pipestone to 89% for seedlings from Mount Royal (Table 10). | page_block:0.90 |
| 7 | p49 | description_snippet | Mount Royal is the low end of field ATCA among sampled plum cultivars (3.18 mm2), indicating lower average ATCA relative to Whittaker (36.89 mm2). | For plum seedlings started in the field, cultivar had a significant effect on ATCA (p<0.001) with average ATCA ranging from 3.18 mm2 for seedlings from 'Mount Royal' to 36.89 mm2 for seedlings from 'Whittaker' (Table 7). | page_block:0.90 |
| 7 | p48 | description_snippet | Mount Royal is the maximum greenhouse initial stem diameter value in the cited range (6.88 mm) in Table 6. | Average initial heights of plum seedlings started in the field ranged from 8.5 cm for seedlings from 'Mount Royal' to 25.7 cm for seedlings from 'Whittaker' (Table 7). ... average initial diameters ranged from 4.21 mm fo | page_block:0.90 |
| 7 | p48 | description_snippet | Mount Royal is the minimum field initial height value in the cited range (8.5 cm), referenced in Table 7 for Experiment III. | Average initial heights of plum seedlings started in the field ranged from 8.5 cm for seedlings from 'Mount Royal' to 25.7 cm for seedlings from 'Whittaker' (Table 7). ... average initial diameters ranged from 4.21 mm fo | page_block:0.90 |
| 7 | p47 | entry_hardiness_observation | In 25-month seed-storage conditions, 'Mount Royal' is listed among the lowest observed average germination values at 4.2% (Table 5). | For seed stored for 25 months, averages ranged from 4.2% for 'Monitor', 'Mount Royal' and 'Pipestone' to 95.8% for 'Hennepin' (Table 5). | page_block:0.90 |
| 7 | p46 | description_snippet | Field Experiment Iincluded Mount Royal in the lowest-average set at 0.0% germination. | Average germination percentages ranged from 0.0% for Mount Royal, Stanley, and Tecomseh to 62.5% for Hennepin ... | page_block:0.90 |
| 112 | p6 | description_snippet | Table 10 shows good fertility/compatibility ratings in the displayed matrix. | Table 10. Self and Cross Fertility in European Plums | page_block:0.90 |
| 112 | p6 | taxon_context | Table 10 identifies Mount Royal as Prunus domestica. | Table 10. Self and Cross Fertility in European Plums | 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 | This row is formatted as a sequence of percentage values paired with letter-class annotations used across the table, matching the Table 2 storage comparison format. | 0.85 |
| storage_duration | For 'Mount Royal' in Table 2: Initial (0 months) 98% (A), 1 month 94% (A-C), 2 months 98% (A), 3 months 93% (B-F), 4 months 88% (A-F), 5 months 90% (AB), 6 months 92% (A-D), 7 months 93% (A-C), 8 months 93% (A-D), 9 mont | 0.95 |
| source_reference_abbreviation | Source citation given as Andersen and Weir, 1967. | 0.95 |
| release_year_reference | Introduction year is approximately 1900 (~1900). | 0.95 |
| entry_pedigree | Species context is P. domestica L. | 0.96 |
| recommendation_context | High stainability implies potential usefulness in breeding crosses. | 0.74 |
| entry_hardiness_observation | Maintained >50% pollen stainability throughout the experiment. | 0.87 |
| release_year_reference | Cultivar has been present for more than a century according to page context. | 0.82 |
| description_snippet | 'Mount Royal' showed high pollen stainability. | 0.89 |
| entry_hardiness_observation | There was some significant but inconsistent variation within Mount Royal in Table 2 pollen stainability data. | 0.96 |
| description_snippet | Mount Royal was included in the set where Superior and La Crescent were reported as significantly different from it. | 0.82 |
| description_snippet | Initial plum stainability was expressed as a range on this page from 81% (Toka) to 98% (Mount Royal), with significant effects reported in surrounding text. | 0.89 |
| description_snippet | Mount Royal had initial pollen stainability of 98% in the plum cultivar set. | 0.96 |
| entry_hardiness_observation | For 'Mount Royal', percent survival was 89 in greenhouse (Grhs.) and 100 in field at the end of Experiment III. | 0.98 |
| description_snippet | Herbivore rating reported as 4.5 (Tukey grouping marker ab). | 0.97 |
| taxon_context | Listed in the Plum section as Prunus domestica 'Mount Royal'. | 0.99 |
| description_snippet | Table values indicate initial height 8.5 cm, initial stem diameter 1.90 mm, change in stem diameter 0.83 mm, and ΔTCA 3.18 mm². | 0.97 |
| taxon_context | Cultivar listed as plum, Prunus domestica 'Mount Royal'. | 0.99 |
| source_reference_abbreviation | Part of Table 6 female-parent greenhouse replication continuation. | 0.95 |
| description_snippet | Prunus domestica 'Mount Royal' has greenhouse values of 60.7 ab, 6.88 a, 1.33, and 9.69 for the listed replication parameters. | 0.97 |
| description_snippet | Included as a plum cultivar entry in Table 5 (continued). | 0.99 |
| storage_duration | Plum 'Mount Royal' field germination was 4.2% at 25 months and 16.7% at 1 month (Table 5). | 0.97 |
| description_snippet | Plum 'Mount Royal' records 16.7% non-scarified and 29.2% scarified germination, with average weeks 1.8 and 1.2. | 0.95 |
| description_snippet | Seed-year year columns show x values, with greenhouse/field replications of 7 and 5. | 0.93 |
| selection_origin_reference | Collection locations are listed as HRC and UMN. | 0.97 |
| description_snippet | Greenhouse survival at the end of Experiment III was reported as 89% for Mount Royal seedlings (Table 10). | 0.96 |
| description_snippet | Mount Royal is the low end of field ATCA among sampled plum cultivars (3.18 mm2), indicating lower average ATCA relative to Whittaker (36.89 mm2). | 0.93 |
| description_snippet | Mount Royal is the maximum greenhouse initial stem diameter value in the cited range (6.88 mm) in Table 6. | 0.97 |
| description_snippet | Mount Royal is the minimum field initial height value in the cited range (8.5 cm), referenced in Table 7 for Experiment III. | 0.97 |
| entry_hardiness_observation | In 25-month seed-storage conditions, 'Mount Royal' is listed among the lowest observed average germination values at 4.2% (Table 5). | 0.90 |
| description_snippet | Field Experiment I included Mount Royal in the lowest-average set at 0.0% germination. | 0.98 |
| description_snippet | Table 10 shows good fertility/compatibility ratings in the displayed matrix. | 0.71 |
| taxon_context | Table 10 identifies Mount Royal as Prunus domestica. | 0.91 |
| ID | Type | Year | Label |
|---|---|---|---|
| No history events. | |||