Funeral Cypress - Cupressus funebris
Family CupressaceaeRedwoods, Cypress, Arborvitae
This evergreen shrub is also commonly called Graveyard Cypress, Mourning Cypress, or Chinese Weeping Cypress. It is native to China, and hardy to USDA Zone 8.
Sometimes used in herbal therapy, flavanoids contained in tea brewed from the funeral cypress has been implicated in cases of acute kidney and liver damage. [3]


 


This funeral cypress is located at the Morton Arboretum in Lisle, Illinois
 
Scientific classification
Kingdom: Plantae
 
Division: Pinophyta
 
Class: Pinopsida
 
Order: Pinales
 
Family: Cupressaceae
 
Genus: Cupressus
 
Species: C. funebris
 
Binomial name
Cupressus funebris
Endl.
柏木 bai mu Chamaecyparis funebris (Endlicher) Franco; Cupressus funebris var. gracilis Carriere.

Trees to 35 m tall; trunk to 2 m d.b.h.; branchlets arranged in a plane, pendulous, green, slender, flattened, ca. 1 mm wide. Leaves densely appressed, scalelike, dimorphic, 1-1.5 mm, apex sharply pointed; facial pairs with a linear abaxial gland; lateral pairs folded face-to-face, overlapping basal part of facial pairs, ridged abaxially. Pollen cones ellipsoid or ovoid, 2.5-5 mm; microsporophylls 10-14. Seed cones dark brown when ripe, globose, 0.8-1.5 cm in diam.; cone scales 6-8(-12), 5-angular, each fertile scale with 3-5(or 6) seeds. Seeds light brown, lustrous, obovate-rhombic or suborbicular, flattened, 2.5-3.5 mm. Cotyledons 2. Pollination Mar-May, seed maturity May-Jun. Native: (found primarily) Below 2000 m. Anhui, Fujian, Gansu, N Guangdong, N Guangxi, E Guizhou, Henan, W Hubei, Hunan, Jiangxi, Shaanxi, Sichuan, Yunnan, Zhejiang; also widely cultivated in South China. [2]

One study showed funeral cypress to be one of three principle constituents (along with Pinus massoniana and Cunninghamia lanceolata) of the main coniferous forests at low elevations of the Three Gorges Reservoir area of China. It was found the shrub and herb layers dominant over the tree layer in these areas. [4]

Essential oils extracted from the leaves of C. funebris have been shown to be repellent and toxic in a fumigation assay against adult Liposcelis bostrychophila Badonnel. The funeral cypress proved most effective of 6 plants tested. The toxicity of the plant oils was enhanced significantly by a controlled atmosphere of  12% CO2 + 9% O2, and 10% CO2 + 5% O2, and balanced N2. [5]

Often classified in Chamaecyparis on account of its flattened foliage sprays and relatively few seeds in small cones; however, it is here placed in Cupressus because of its developmental characters (cones maturing in 2nd year) and chemical composition of biflavones. [2]

"Worldwide use of herbal therapy has increased dramatically in recent years. Most herbal therapies were not regulated as medicines, and their adverse effects often were underreported. We report a patient who developed acute renal failure, acute hepatic failure, autoimmune hemolytic anemia, and thrombocytopenia after oral intake of hot-water extract of Cupressus funebris Endl (Mourning Cypress), which is rich in flavonoids. Her renal biopsy showed acute tubular necrosis, interstitial nephritis, and hemoglobin casts. The clinical course and pathological findings were consistent with flavonoid-induced acute nephropathy. We emphasize that flavonoids are not harmless and may induce acute life-threatening renal damage."  [3]
 
Common names:
  • Chinese weeping chamaecyparis   (Source: Phytol Mem 8:55 as Chamaecyparis funebris)
     
  • Chinese weeping-cypress   (Source: HerbSpices as Chamaecyparis funebris)
     
  • mourning-cypress   (Source: World Econ Pl )
     
  • bai mu   (Source: F ChinaEng ) [Chinese]
     
  • Trauer-Zypresse   (Source: Zander ed17 ) [German] [1]

 

Economic importance:

 

Native:
  • ASIA-TEMPERATE
    China: China - Anhui, Fujian, Gansu, Guangdong [n.], Guangxi [n.], Guizhou [e.], Henan, Hubei [w.], Hunan, Jiangxi, Shaanxi, Sichuan, Yunnan, Zhejiang [1]
 


Cupressus funebris, Kyneton Botanic Gardens, Victoria, Australia.
Photo: Melburnian

References:
1. USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN) National Germplasm Resources Laboratory, Beltsville, MD
2. Flora of China, www.efloras.org, Cupressus funebris Endlicher, Syn. Conif. 58. 1847.
3. Jia-Jung Lee and Hung-Chun Chen, “Flavonoid-induced acute nephropathy by Cupressus funebris Endl (Mourning Cypress),” American journal of kidney diseases : the official journal of the National Kidney Foundation 48, no. 5 (November 2006): e81-5.
4. Ruimei Cheng and Wenfa Xao, “[Biodiversity of main coniferous forests at low elevation of Three Gorges Reservoir area],” Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban 16, no. 9 (September 2005): 1791-4.
5. J J Wang et al., “Toxic effects of six plant oils alone and in combination with controlled atmosphere on Liposcelis bostrychophila (Psocoptera: Liposcelididae),” Journal of economic entomology 94, no. 5 (October 2001): 1296-301.
 

 
 

              
 
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