本文总结了牡丹品种‘墨莲’的选育鉴定过程及扩繁技术。该品种是通过人工定向杂交选育的优良黑色系观赏牡丹品种，杂交组合为‘黑海金龙’ב冠世墨玉’。经多年观察、扩繁以及多点试验，该品种表现出良好的一致性和稳定性，其花朵墨紫色、花瓣基部具黑斑，质地硬，润泽，花朵直立，单朵花期长，耐日晒；花枝长，节间长，植株中高直立，成花率高，生长势强，花期中（偏早）。扩繁方法以嫁接和分株为主，嫁接选用芍药或牡丹根作砧木，9月中下旬进行，采用贴接法，接后栽植并覆土保湿，2年后可出圃；分株于9—10月进行，将母株分割成带根枝条，栽植时注意根系舒展，覆土成丘保温。本文为选育稀缺花色的牡丹品种提供参考。

The breeding and identification process as well as the propagation techniques of the tree peony variety ‘Molian’ were summarized. This variety is an excellent black-flowered ornamental variety bred through artificial directional hybridization, with the cross combination being ‘Heihaijinlong’ × ‘Guanshimoyu’. After years of observation, propagation, and multi-site trials, the cultivar demonstrated good uniformity and stability. Its flowers were dark purple with black spots at the petal base, featuring hard and lustrous petals, upright blooms, long single-flower duration, and strong sun resistance. The flowering branches were long with elongated internodes, and the plant exhibits a medium-tall, upright growth habit, high flowering rate, vigorous growth, and a medium (early) flowering period. The main methods of propagation are grafting and division. For grafting, herbaceous peony or tree peony roots were used as rootstocks, performed in mid-to-late September using the side-veneer grafting method. After grafting, the plants were planted and covered with soil for moisture retention, becoming ready for transplanting after two years. Division was carried out from September to October, where the mother plant was separated into rooted shoots, and care was taken to ensure the roots were spread out during planting, with soil mounded for warmth retention. This study provides a reference for breeding tree peony variety with rare flower colors.