Is cycad fern cycad? what's the difference between cycad fern and cycad?

Cycad fern is a member of a large family of ferns, and it is a relatively large epiphytic fern. If it is used in courtyards, parks and other places to grow, it is of high ornamental value and has the ability to purify the air.

I. introduction of cycad fern

Morphological characteristics: large epiphytic fern, plant height 100~150cm. Rhizome stout and erect, apically densely scaly. Simple leaves, radially clustered at the top of the root-like Reed, hollow as a bird's nest. Leaf blade broadly lanceolate, up to 90~lOOcm, wide to lO~20cm, bright green. The sporangium group is long and strip-shaped, born on the upper side of the lateral vein, and the sac group covers the membranous. Cycad fern leaves radiation ring around the rhizomatous short stem, forming a rosette, the middle of the rosette is a cylinder, the column is wrapped with black fibers, the plant shape is strange, such as a bird's nest, dense leaves, green all the year round, is a beautiful large foliage plant.

Ecological habits: distributed in Asia, Africa and Australia, growing in warm, humid tropical rain forests. Like warm and humid environment, often attached to trees or rocks, in high temperature and humid conditions, can grow all the year round. It is not cold-resistant, the suitable temperature for growth is 20-22 ℃, and the winter temperature is not lower than 5 ℃.

The same genus and species are: N.antrophyoides, narrow leaf, oblanceolate, nearly fleshy, smooth on both sides, tip acute, slightly rewind after drying.

Second, the medicinal value of cycad fern.

[source] Medicinal material source: it is the rhizome of cycad fern of Dryopteridaceae.

[harvest and storage] can be harvested, washed, dried or fresh throughout the year.

[chemical constituents] contains dryocrassin.

[pharmacological action] in vitro test: cycad fern has strong anti-adenovirus (Ad3) activity. It has certain killing effect on Ascaris lumbricoides. Intragastric administration of 3.54g/kg could shorten the prothrombin time of rabbits.

[identification] (1) the crude powder 3G of this product was extracted by TLC, 30ml was added, 30min was extracted by heating, filtered, acidified with hydrochloric acid, extracted with ether for 3 times, combined filtrate, concentrated to dry, dissolved with chloroform 2ml, point on silica gel G thin layer plate, spread out with chloroform-acetone-glacial acetic acid (80RV 20v2.5), first sprayed with 0.5% solid blue B salt (fast blue B salt) solution. Then spray 0.1mol/L sodium hydroxide solution, the marinic acid shows orange-red spots. (2) take the cross section of this product, drop 1% vanillin ethanol solution and concentrated hydrochloric acid, and microscopic examination shows that the endophytic glandular hair in the intercellular space is red.

Slightly astringent; cool.

[functional indications] clearing heat and detoxification; promoting blood circulation and hemostasis; deworming. Main cold; burn; traumatic bleeding; ascariasis

Internal administration: fried soup, 6-15g. External use: appropriate amount, tamping.

The difference between cycad fern and cycad

1. According to its category, cycad fern is a kind of large fern, while cycad is an ancient gymnosperm.

two。 Although they are similar in appearance, they are different in category and reproduction. Cycads are propagated mainly by seeds and tillers, cycads are propagated by robes, and spores and young leaves are often used for tissue culture.

3. Cycad ferns are often wild on drier hillsides and roadsides. Like warm climate, not cold-resistant. I like to grow in places with plenty of sunshine and good drainage. It is also different from most other ferns that like shady and humid environment. It grows on arid slopes and likes the sun. It is planted as an excellent product of landscaping in South China, and it is very natural.

4. Cycad fern, as a national second-class key protected wild plant, has not only the noble and dignified cycad, but also the elegant elegance of ferns, so it is often watched in pots and placed in the courtyard or park. When potted, you can also plant some Selaginella on the potted surface to do decoration, which not only looks beautiful, but also has some interest.

Here, I would like to remind you that cycad ferns have insect pests, nematodes can harm leaves, brown reticular line spots appear, and can be prevented and treated with kexidan. Sometimes slugs also attack the leaves and should be scraped off in time.