A, the distribution range is different
1, hemp leaf: mainly produced in northeastern China, northwestern China, north China and other places. Now Jiangsu, Shandong, Anhui, Hebei and other places have a large number of cultivation.
2, marijuana: the original distribution in India, Bhutan and Central Asia, now countries have wild or cultivated. All parts of China are also cultivated or reduced to the wild. Xinjiang common wild.
Second, different morphological characteristics
1, hemp leaf morphological characteristics:
Annual herb, L-3m high. Stem erect, surface longitudinally grooved, densely pubescent, cortex rich in fiber, basal lignification. Palm leaves alternate or lower opposite, fully lobed, lobes 3-11, lanceolate to oblong-lanceolate, tapering at both ends, roughly serrate margins, dark green and densely hairy above, densely covered with grayish-white felt below.
Petiole 4-15 cm long, covered with short wool; stipules small, lanceolate. Flowers unisexual, dioecious; male flowers in scattered panicles, terminal or axillary.
Male flowers with 5 tepals, 5 stamens, filaments slender, anthers large; female flowers in axillary leaf clusters, green and yellow, with an elliptic bract outside each flower, perianth membranous-lobed. Pistil 1; locules elliptic, styles dichotomous. Achenes ellipsoid, 4-5 mm long, hard, gray-brown, with fine reticulate lines, enclosed in persistent yellow-brown bracts. Flowering May-June, fruiting July-August.
2, Cannabis Morphological Characteristics:
Annual erect herb, 1-3 m tall, with longitudinally sulcate branches and dense grayish-white appressed hairs. Leaves palmately divided, lobes lanceolate or linear-lanceolate, 7-15 cm long, middle lobe longest, 0.5-2 cm wide, apical acuminate, base narrowly cuneate, surface dark green, slightly rough, abaxially densely covered with gray-white laminated laminate hairs, glabrous when young, margins inward.
Curved coarsely serrate, midrib and lateral veins slightly sunken on surface, raised upward abaxially; petiole 3-15 cm long, densely covered with gray-white appressed hairs; stipules linear. Male inflorescences up to 25 cm long; yellowish-green flowers, perianths 5, membranous, covered with fine hairs, stamens 5, filaments very short, anthers oblong; petiole 2-4 mm long; female flowers green; perianth 1, tightly enclosing the ovary, slightly hairy.
Ovary subglobose, enclosed outside bracts. Achenes enclosed by persistent yellowish brown bracts, pericarp brittle, surface finely reticulate. Flowers from May to June and fruits in July.
Expanded Information:
Cannabis seeds can germinate at 1-3°C at a suitable temperature of 25-30, seedlings can tolerate growth at -3-5°C at a suitable growth temperature of 10-15, a rapid growth period of 19-23, and maturity of 18-20. when flowering at -1~2°C, the organelles die, and the seeds fail to form.
Marijuana is a light-loving short-day crop, late-maturing varieties are more sensitive to light. In production, southern cultivation and northern cultivation is beneficial to increase fiber yield.
Baidu Encyclopedia - Cannabis sativa
Baidu Encyclopedia - Hemp Leaf