Corylus avellana

Species evidence

Record the organs supporting identification and the alternatives they exclude.

1. What do mature husk enclosure, husk lobing and nut dimensions indicate about C. avellana versus C. maxima or C. colurna? definition
2. Which diagnostic organs were observed on this plant, when, and in which photographs or specimens? provenance
3. What missing or conflicting character requires identification to remain provisional? boundary

Cultivar attribution

Retain traceable identity claims without treating a commercial name as proof.

1. Which supplier, accession or mother-plant record supports the cultivar and species attribution? provenance
2. Does unusual foliage, branch form or fruit morphology fit a documented cultivar, or require review of the identification? boundary

Stool membership

Record what evidence joins stems into one observed plant.

1. Which stems share an observed basal stool, and which nearby shoots have unverified connections? boundary
2. For a grafted specimen, which observed shoots arise above or below the graft union? measurement

Regrowth capacity

Assess the stool through dated cutting history and observed recovery.

1. When was the stool last cut, and what records distinguish stool history from current stem age? provenance
2. How many live replacement shoots developed, and how have their length and basal diameter changed? measurement
3. Does observed recovery support another cut for the stated objective, or favour retaining stems and reassessing? action

Pollen opportunity

Evaluate whether suitable pollen could reach receptive flowers.

1. On which dates were pollen shedding and female receptivity observed or assessed separately? measurement
2. Which nearby hazels have documented compatibility and overlapping pollen release? provenance
3. What additional observation is needed before attributing poor nut set to inadequate pollination? action

Crop outcome

Use dated samples to explain the difference between visible nuts and harvestable output.

1. What proportions of a defined sample are developing, filled, empty or visibly damaged? measurement
2. What observations distinguish failure to develop from premature drop or animal removal? measurement
3. Which locally validated maturity indicators support harvest for the intended use? action

Site fit

Record measured conditions and locally relevant performance evidence.

1. What root-zone moisture, drainage, pH and crown light measurements accompany the current growth assessment? measurement
2. Did frost or dry conditions coincide with this plant's recorded flowering or nut-development stages? measurement
3. Which site adjustment is supported for this hazel's stated objective and observed limitation? action

Condition assessment

Locate and track abnormal buds, foliage, stems and nuts before selecting a response.

1. How extensive are enlarged buds, leaf coatings, shoot dieback, bark injury or nut holes, and how have they changed? measurement
2. What diagnostic evidence supports a pest, pathogen or environmental cause rather than a symptom-only label? provenance
3. Should the agent monitor, obtain a diagnostic sample or refer to a locally applicable treatment model? action

Offspring identity

Choose propagation according to whether seedling variation or preservation of an attributed cultivar is intended.

1. Must the new plant preserve a documented cultivar, or is a seedling of recorded parentage acceptable? definition
2. What mother-plant and shoot-origin evidence supports the identity of the selected propagation material? provenance
3. What observed rooting and establishment criteria must be met before separating or transplanting vegetative material? action

Management decision

Make the intended benefit and follow-up assessment explicit before altering the hazel.

1. Is this plant being managed primarily for nuts, coppice stems, ornament, habitat or a documented combination? definition
2. What observed habitat use and linked permissions constrain pruning, coppicing or nut collection at this location? boundary
3. Which intervention is supported now, and what subsequent regrowth, flowering or crop observation will determine whether it succeeded? action

Kinds and varieties

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

1. Which of these kinds and varieties hold for the sense of Corylus avellana 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.

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

Standards and regulation

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

1. Which of these standards and regulation hold for the sense of Corylus avellana this model covers, and on what evidence? provenance

Real-world use

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

1. Which of these real-world use hold for the sense of Corylus avellana this model covers, and on what evidence? provenance

Typical measurements

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

1. Which of these typical measurements hold for the sense of Corylus avellana this model covers, and on what evidence? provenance

Failure modes and hazards

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

1. Which of these failure modes and hazards hold for the sense of Corylus avellana this model covers, and on what evidence? provenance

Regional variation

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

1. Which of these regional variation hold for the sense of Corylus avellana this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

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

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of Corylus avellana this model covers, and on what evidence? provenance