What is Jatropha?

Urticaceae. Evergreen tree, 8 ~ 15m high. Distributed in northern Vietnam, southwest and west Guangxi, south and southeast Yunnan. Born in a tropical seasonal rain forest at an altitude of 700 ~ 1000m. The flowering period is from January to February (Yunnan) or September to October (Guangxi), and the fruiting period is from April to May (Yunnan).

Jatropha

(Leprosy)

Arbor, 3-15 meters high, 8-20 cm DBH, gray-white bark, elliptic lenticels; branchlets are round, hollow, short hairs and bristles on the upper part, and then gradually hairless, with obvious leaf marks, semi-circular. Leaves large, born on top of branches, papery, heart-shaped, 15-25 cm long, 12-22 cm wide, apex

The distribution area has distinct dry and wet seasons, with an average annual temperature of 21 to 22 ° C, an extreme maximum temperature of 38 to 40 ° C, an extreme minimum temperature of 2 to 5 ° C, and an annual rainfall of 1200 to 1500 mm. The soil is black limestone developed from Permian limestone, with a pH of 7 to 7.5. The hemp tree system is developed, fastened to the rock or extended stone cracks, and has the characteristics of resistance to dryness and barrenness. ^[4]

Produce

National three-level key protection

Bark: Toxic. Repellent worms. For tsutsugamushi disease. ^[5]

The bristle of the hemp tree is a kind of epidermal glandular hair. The end of the bristle is a thin-walled globular cell with thorns. It is brittle, and the lower part is calcified and hard. The hair pillow mainly performs the function of secreting stimulants. The venom of the stimulants is very complicated. It contains a special enzyme and formic acid, acetic acid, butyric acid and nitrogen-containing acidic substances. When it comes into contact with the skin, the capillaries rupture, the rough ends pierce the skin, and the contents of the bristles containing various active ingredients are injected, which causes severe burning, itching, redness and swelling, which are like urticaria and immediately cause irritation Dermatitis. This tingling sensation is the combined damage of the mechanical and chemical effects of bristles on the skin. Urticaceae are mainly poisonous genus Urtica ( UticaL . ), Dendrocnide Miq . And Girardinia Gaud ., Such as nettle, stinging nettle, rotunda hemp, etc. Bristle. According to the literature, the whole leaf hemp tree of the Urticaceae family has the medicine name "Invincible in the World" in Chinese herbal medicine and can drive roundworms. ^[3]