NPC 协会背景与发起机构
荷兰植物收藏协会 (Nederlandse Planten Collecties, 简称 NPC) 是由皇家 Boskoop 栽培协会 (Koninklijke Vereniging voor Boskoopse Culturen, 缩写 KVBC) 发起的植物收藏合作项目，协会总部位于南荷兰省 Gouda (Wilde Wingerdlaan 16, 2803 WC Gouda)。协会目前共有 103 份通过章程审核的植物收藏，由分布在荷兰各地的私人苗圃、树木园、植物园、大学附属园区和家族种植机构负责日常维护。协会将章程、收藏清单、申请流程和联系方式都公开在官方网站，任何愿意按章程整理自家收藏的种植机构都可以提交入会申请。
章程规范与收藏分类要求
协会章程共 11 章，覆盖目的、定义、品种范围、位置、株距与标识、参观、申请与评估、入会与退会、公开渠道、评比及未规定事项的处理。可纳入 NPC 名录的收藏只限于木本植物、多年生植物和球根植物三大类，一二年生的草本花卉、蔬菜、室内盆栽和热带温室植物明确被排除在外。所有收藏都必须种植在固定地块的土壤中，不接受纯盆栽栽培；每一份植株都需要配有永久且不易脱落的标识牌，收藏方每年向协会秘书处提交一份最新的收藏清单。章程同时规定，NPC 收藏的命名可以随收藏本身转让，因此收藏的延续不以个人收藏人为限。
收藏分布与典型收藏实例
协会名下的 103 份收藏按地理分布在多家专业种植机构之间安排，章程鼓励同一属的多个收藏分布在不同的土壤和地理区域，以便在不同气候条件下对相同植物进行平行比较。木兰属收藏由 Lottum 地区的 Piet Vergeldt 苗圃负责维护，目前收录数百个木兰杂交种、变种和命名品种；栎属收藏位于鹿特丹的 Trompenburg 公园与树木园，由树木园团队负责，集合了约 500 种栎树以及多个原产于不同地理区域的橡子后代；山茶属收藏由海牙和平宫的 Carnegie 基金会维护，列出了 100 余个欧洲常见的山茶栽培品种；丁香属收藏由 Lottum 的 Lakei 苗圃负责，主要收录丁香栽培品种。
访问方式与收藏公开
协会下属的每一份收藏都遵循相同的开放规则，收藏方在自己的开放日或与收藏方约定时间后对外开放，参观者需要直接联系负责该收藏的机构预约。协会官方网站提供完整的收藏清单，每一份收藏都标明负责机构名称、所在城市、所在省份、收藏的属名和典型植物列表，并附上每个负责机构的对外联系渠道。作为发起单位，KVBC 每年在 Dendroflora 年刊中收录这些 NPC 收藏的完整名单，凡符合章程要求的收藏地位都将持续被公开确认。
修订流程与外部合作
协会章程第 8 章和第 9 章明确收藏方更新和公开流程，任何收藏方都可以向协会秘书处提交藏品变更、撤销或新增收藏的申请；秘书处审核后通过协会网站上的 Wijziging doorgeven 页面更新收藏清单。协会本身是非营利合作项目，KVBC 为 NPC 提供商标、章程与公开渠道支持，协会委员会成员由 KVBC 提名、各收藏方代表及独立树木学家共同组成。访问者可从协会网站跳转查看单一收藏的全部明细。
NPC Association Background and Founding Body
Nederlandse Planten Collecties (NPC) is a coordinated network of plant collections launched under De Koninklijke Vereniging voor Boskoopse Culturen (KVBC), the Dutch royal association for nursery stock and cultivar assessment based in Gouda (Wilde Wingerdlaan 16, 2803 WC Gouda). The programme currently lists 103 officially registered NPC collections that are maintained by private nurseries, public arboreta, botanical gardens, university-affiliated gardens and family-run plantings across the Netherlands. The association publishes the Reglement, the full collection index, the application procedure and the contact details of every collection holder on its official site.
Reglement, Plant Categories and Site Requirements
The NPC Reglement covers 11 sections, including objectives, definitions, plant assortment rules, location requirements, plant spacing and labelling, visiting arrangements, application and evaluation, admission and resignation, publication, award judging and provisions for unlisted cases. Only collections of woody plants, hardy perennials and bulbous plants qualify for NPC registration; annuals, biennials, vegetables, house plants and tropical greenhouse species are explicitly out of scope. Collections must be planted in the open ground in a single contiguous plot, with permanent securely attached labels on every plant and a visible name board for the collection as a whole.
Collection Distribution and Notable Examples
The 103 NPC collections are distributed across the Netherlands and the Reglement encourages multiple collections of the same genus on different soils and in different regions for parallel comparison. The Magnolia collection is maintained by Piet Vergeldt boomkwekerij in Lottum and currently lists several hundred taxa including Magnolia hybrids, species and selected cultivars. The Quercus collection is held by Trompenburg Tuinen & Arboretum in Rotterdam and brings together about 500 oak species together with multiple wild-origin acorn progenies and several Trompenburg-raised selections. The Camellia collection at the Peace Palace in The Hague is run by the Carnegie Stichting and lists over 100 commonly cultivated Camellia cultivars.
Visiting and Publication Channels
Each NPC collection follows the same visiting rule: the collection is open either during the holder’s regular open days or by appointment booked with the holder. The official site lists every collection with the holder’s name, town, province, genus, a representative plant list and the holder’s contact details. KVBC, as the founding body, undertakes to publish the NPC collections in its annual Dendroflora yearbook under the chapter “Nederlandse Planten Collecties”, so a properly maintained collection remains on the public record for as long as it meets the Reglement.
Updating Procedure and External Cooperation
Chapters 8 and 9 of the Reglement cover the procedure by which a holder can update or withdraw an NPC collection. Any change request can be sent to the NPC secretary, after which the association updates the public list on its Wijziging doorgeven page. The NPC itself is run as a non-profit cooperation project under the KVBC umbrella, and KVBC supplies the trademark, the Reglement and the publication channels. The committee is drawn from KVBC nominees, holder representatives and independent dendrologists.
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