Vaccinium myrtillus

Twig and leaf character combination

Record the combination of twig angularity, leaf margin, arrangement and persistence rather than accepting one diagnostic-looking trait.

1. Which twig and leaf characters were directly observed, and which could not be assessed because of season or specimen condition? measurement
2. Which locally plausible Vaccinium alternatives remain compatible with those observations? boundary

Flower and fruit determination

Record flower placement, calyx form and mature-fruit characters together with the reference supporting the determination.

1. What flower arrangement, calyx structure and fruit characters are documented on this plant? measurement
2. Which regional key, voucher comparison or expert determination supports the identification, and were all images taken from the same plant? provenance

Observed unit and connectivity

Declare whether the record concerns a shoot, clump, patch or demonstrated genet and qualify any inferred connection.

1. What observable boundary defines this record, and how are its shoots or patch limits relocated? definition
2. Is shared identity supported by traced rhizomes or genetic evidence, or inferred only from proximity? provenance

Recruitment and cover change

Track bilberry cover and new growth without assuming that each new shoot represents seedling recruitment.

1. How have mapped extent, percentage cover and live-shoot density changed under the same sampling method? measurement
2. What evidence distinguishes seedlings from vegetative shoots, and which recruits remain unresolved? boundary

Stage and observation window

Record concurrent stages and observation coverage so absent fruit or leaves are interpreted in context.

1. What proportions of sampled shoots are leafing, flowering, fruiting, senescent or dormant on the observation date? measurement
2. When should this locality be revisited to observe the missing identification or reproductive stage? action

Flower-to-ripe-berry transition

Follow tagged shoots from flowers to retained ripe berries while keeping possible loss mechanisms separate.

1. How many flowers, developing fruits and ripe berries occur on the same tagged shoots across visits? measurement
2. What observations support explanations involving flower damage, pollination limitation, fruit abortion or fruit removal? provenance

Site condition evidence

Associate soil acidity, moisture, organic horizon and canopy exposure with observations of this patch.

1. What are the measured soil pH, root-zone moisture and canopy openness, with methods, depths and dates? measurement
2. Do healthier and declining parts of the patch differ consistently in these conditions? measurement

Damage, cause and response

Distinguish seasonal colour change from injury and preserve uncertainty about browsing, weather, disease or mechanical damage.

1. Which leaves, buds, stems or rhizomes show injury, and what proportion of the sampled unit is affected? measurement
2. What evidence supports the suspected cause, and what follow-up would test recovery before an intervention is chosen? action

Collection extent and handoff

Record the proposed amount and method, remaining fruit and plant damage risk; preserve origin when detached fruit becomes a separate lot.

1. What identification, ripeness, fruit-abundance and patch-condition evidence supports or defers the proposed collection? action
2. Which current access or conservation constraints apply, and how will collected fruit retain its patch and collection-date provenance? provenance

Donor-to-recipient establishment

Connect any proposed seed, cutting or division method to evidence, donor impacts, recipient conditions and observable success criteria.

1. Which propagation method has supporting evidence for the material and locality, and what donor disturbance would it require? action
2. What provenance, recipient-site measurements and follow-up criteria will distinguish initial survival from sustained establishment? measurement

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Wild European bilberry (typical blue-black fruit, purple juice)
• White-fruited forms (f. leucocarpum / white-berried variants recorded in the wild)
• Red-fruited forms (f. erythrocarpum / red-berried variants)
• High-elevation alpine populations (short, dense mats above treeline)
• Forest-understorey populations (taller, more open growth under pine and spruce)
• Commercial wild-harvested fruit (fresh, frozen, dried, juice and extract trade)
• Cultivated or semi-cultivated plantings (limited; mainly for fruit or restoration, not large-scale blueberry-style orchards)

1. Which of these kinds and varieties hold for the sense of Vaccinium myrtillus this model covers, and on what evidence? provenance

Identifiers and schemes

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• IPNI / POWO LSID - urn:lsid:ipni.org:names:262371-2 - Linnaean name Vaccinium myrtillus L.; accepted in Plants of the World Online.

1. Which of these identifiers and schemes hold for the sense of Vaccinium myrtillus this model covers, and on what evidence? provenance