味辛，平，无毒。主利水道，杀蛊毒，辟不祥，除胸中痰癖。久服益气，轻身，不老
，通神明。一名水香。生大吴池泽。四月、五月采。
陶隐居云∶方药、俗人并不复识用。大吴，即应是吴国尔，太伯所居，故呼大吴。今东
间有
煎泽草，名兰香。亦或者此也，生湿地。李云∶是今人所种，似都梁香草。唐本注云∶此是
兰泽香草也。八月花白，人间多种之以饰庭池，溪水涧旁往往亦有。陶云不识，又言煎泽草
，或称李云都梁香近之，终非的识也。今按别本注云∶叶似马兰，故名兰草，俗呼为燕尾香
。时人皆煮水以浴，疗风。故又名香水兰。陶云煎泽草，唐注云兰泽香，并非也。臣禹锡等
谨按蜀本图经云∶叶似泽兰，尖长有歧，花红白色而香，生下湿地。陈藏器云∶兰草与
泽兰
，二物同名。陶公竟不能知，苏亦强有分别。按兰草本功外，主恶气，香泽可作膏涂发。生
泽畔，叶光润，阴小紫，五月、六月采阴干，妇人和油泽头，故云兰泽。李云都梁是也。苏
注兰草云∶八月花白，人多种于庭池，此即泽兰，非兰草也。泽兰叶尖，微有毛，不光润，
方茎紫节，初采微辛，干亦辛，入产后补虚用之。已别出中品之下。苏乃将泽兰注于兰草之
中，殊误也。《广志》云∶都梁香出淮南，亦名煎泽草，盛洪之《荆州记》曰∶都梁县有山
，山下有水清浅，其中生兰草，因名为都梁，亦因山为号也。
衍义曰∶兰草，诸家之说异，同是曾未的识，故无定论。叶不香，唯花香。今江陵、鼎、
澧
州
山谷之间颇有，山外平田即无，多生阴地，生于幽谷，益可验矣。叶如麦门冬而阔，且韧，
长及一、二尺，四时常青，花黄，中间叶上有细紫点，有春芳者，为春兰，色深。秋芳者，
为秋兰，色淡。秋兰稍难得，二兰移植小槛中，置座右，花开时，满室尽香，与他花香又别
。唐·白乐天有种兰不种艾之诗，正谓此兰矣。今未见用者。《本经》苏注∶八月花白，此
即泽兰也。
味辛，性平，无毒。主治通利水道，杀灭蛊毒，辟除不祥之气，消除胸中的痰饮积滞。长期服用能益气，使身体轻盈，延缓衰老，通达神明。又名水香。生长在大吴的池泽之中。四月、五月采收。
陶隐居说：当时的方药和世俗之人都不再认识和使用它。大吴，应该就是吴国所在地，是太伯居住的地方，所以称为大吴。现在江东地区有煎泽草，名叫兰香。也许就是这种植物，生长在湿地中。李云说：这是今人种植的，类似于都梁香草。《唐本草》注解说：这是兰泽香草。八月开白花，民间多种植以装饰庭院池塘，溪涧旁边往往也有生长。陶弘景说不认识，又说是煎泽草，或许李云说的都梁香比较接近，但终究不是确切的认识。现在按照其他版本的注解说：叶子像马兰，所以叫兰草，俗称为燕尾香。当时的人常煮水洗澡，治疗风疾。所以又叫做香水兰。陶弘景说的煎泽草，《唐本草》注说的兰泽香，都不是正确的。臣禹锡等人谨慎按蜀本图经记载：叶子像泽兰，尖端细长且有分叉，花红白色且芳香，生长在低湿之地。陈藏器说：兰草与泽兰，两物同名。陶弘景竟然不能分辨，苏恭也强行加以区分。除了兰草原本的功效外，还能主治恶气，其香气润泽可制作成膏涂抹头发。生长在沼泽边，叶子光亮润泽，背面微紫，五月、六月采后阴干，妇人用油和泽涂头，所以叫兰泽。李云说的都梁香草就是这种。苏恭注解兰草说：八月开白花，人们多种植在庭院池塘中，这实际上是泽兰，不是兰草。泽兰叶子尖细，微有毛，不光滑润泽，茎方形，节部紫色，初采时微辛，干燥后也辛，用于产后补虚。已经另外在中品之下列出。苏恭却将泽兰注解在兰草条目中，非常错误。《广志》说：都梁香出产于淮南，也叫煎泽草。盛洪之的《荆州记》说：都梁县有座山，山下有水清澈浅显，其中生长兰草，因此命名为都梁，也因山而得名。
《衍义》说：兰草，各家说法不同，同样未曾确切认识，所以没有定论。叶子不香，只有花香。现在江陵、鼎州、澧州的山谷之间很多，山外平原田地就没有，多生长在阴凉之地，生于幽深山谷，这一点可以验证。叶子像麦门冬但更宽，而且坚韧，长一至二尺，四季常青，花黄色，中间叶子上有细紫点，春天开花的叫春兰，颜色深。秋天开花的叫秋兰，颜色淡。秋兰稍难得到，这两种兰移植到小盆中，放在座右，花开时满室皆香，与其他花香味不同。唐代白居易有“种兰不种艾”的诗，正是指这种兰。现在未见使用。《本经》苏恭注说：八月开白花，这即是泽兰。
Pungent in flavor, neutral in nature, non-toxic. It primarily promotes the flow of water passages (water metabolism), kills gu poison (parasitic diseases caused by toxins), wards off inauspicious influences, and eliminates phlegm accumulation in the chest. Long-term consumption benefits Qi, lightens the body, prevents aging, and clarifies the mind (Shen). Also known as Shuixiang (Water Fragrance). Grows in the ponds and marshes of Dawu. Harvested in April and May.
Tao Hongjing stated: Neither medical formulas nor common people recognize or use it anymore. "Dawu" refers to the state of Wu, where Taibo resided, hence the name. Currently, in the Jiangdong region, there is a plant called Jianze Cao with the name Lanxiang. It might be this one, growing in wetlands. Li Yun said: This is what people currently cultivate, resembling Duliang Xiang (Duliang Fragrance). The commentary of *Tang Bencao* states: This is Lanze Xiang (Lan Marsh Fragrance). It bears white flowers in August; many households plant it to decorate courtyards and ponds, and it is often found beside streams and ravines. Tao claimed ignorance and referred to it as Jianze Cao. Perhaps Li Yun's Duliang Xiang is closer, but ultimately not an accurate identification. According to another version's annotation: The leaves resemble those of Malan (Kalimeris indica), thus named Lancao; commonly called Yanwei Xiang (Swallowtail Fragrance). People at that time boiled its water for bathing to treat wind disorders. Hence, it is also called Xiangshui Lan. Tao's reference to Jianze Cao and the Tang commentary's Lanze Xiang are both incorrect. Ministers Yu Xi et al., carefully consulting the *Shu Ben Tu Jing*, recorded: Leaves resemble Zelan (Eupatorium fortunei), pointed, long, and lobed; flowers are red-white and fragrant; grows in low-lying wet areas. Chen Cangqi stated: Lancao and Zelan share the same name. Tao failed to distinguish them, and Su Gong forced a distinction. Besides its original functions, Lancao treats foul odors/qi; its aromatic essence can be made into ointment for hair. It grows by the marshes; leaves are glossy and smooth, slightly purple underneath. Harvested in May and June, dried in shade. Women mix it with oil to apply to their heads, hence the term "Lan Ze." Li Yun's Duliang is this plant. Su Gong's annotation on Lancao states: "White flowers in August, widely planted in courtyards and ponds"—this is actually Zelan, not Lancao. Zelan has pointed leaves, slightly hairy, not glossy; square stems with purple nodes; pungent when fresh and dry; used for postpartum deficiency replenishment. It has been separately listed under the lower section of the Middle Category. Su Gong erroneously annotated Zelan within the Lancao entry. *Guangzhi* states: Duliang Xiang originates from Huainan, also called Jianze Cao. Sheng Hongzhi's *Jingzhou Ji* says: There is a mountain in Duliang County; beneath it lies clear, shallow water where Lancao grows, giving the place its name, which also derives from the mountain.
*Yanyi* states: Various schools have different theories on Lancao, none having achieved precise identification, thus no definitive conclusion exists. The leaves are not fragrant; only the flowers are. It is abundant in the valleys of Jiangling, Dingzhou, and Lizhou today, but absent in the flat fields outside the mountains. It thrives in shady places and deep valleys, which serves as verification. Leaves resemble Maidong (Ophiopogon japonicus) but are broader and tougher, reaching one to two chi in length, evergreen, with yellow flowers and fine purple spots on the central leaf surface. Those flowering in spring are Chunlan (Spring Orchid), with deeper color. Those flowering in autumn are Qiulan (Autumn Orchid), with lighter color. Qiulan is slightly harder to obtain. When transplanted into small pots and placed by the bedside, their fragrance fills the room upon blooming, distinct from other flowers. The Tang dynasty poet Bai Juyi wrote a poem titled "Planting Orchids, Not Mugwort," referring precisely to this orchid. It is currently unused. Su Gong's annotation on *Benjing* states: "White flowers in August"—this refers to Zelan.