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Rhododendron lapponicum

Botanical Name : Rhododendron lapponicum
Family: Ericaceae
Genus: Rhododendron
Species:R. lapponicum
Kingdom:Plantae
Order: Ericales

Synonyms:
*Azalea lapponica L.
*Rhododendron confertissimum Nakai
*Rhododendron lapponicum subsp. parvifolium (Adams) T. Yamaz.
*Rhododendron palustre Turcz.
*Rhododendron parviflorum F. Schmidt
*Rhododendron parvifolium Adams
*Rhododendron parvifolium subsp. confertissimum (Nakai) A.P. Khokhr.

Common Names: Lapland rosebay

Habitat : Rhododendron lapponicum is native to N. Europe, N. Asia. Northern N. AmericaAlaska to Quebec. It grows on the rocky barrens and sub-alpine woods.It is found in subarctic regions around the world, where it grows at altitudes ranging from sea level to 1900 meters.

Description:
Rhododendron lapponicum is an evergreen perennial Shrub growing to 1 m (3ft 3in) by 1 m (3ft 3in).Leaves are thick, leathery, evergreen, and 1 to 1.5 cm long, growing to 30 cm in height they are leathery, evergreen, elliptic, and covered with many small scales, much longer than wide. Flowers few, 1.5 cm wide, bright purple, bell-shaped, developing at the end of the branches. Fruits are 5 mm wide.

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It is in flower from Apr to May. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects
Cultivation:
Succeeds in a most humus-rich lime-free soils except those of a dry arid nature or those that are heavy or clayey[1]. Prefers a peaty or well-drained sandy loam. Succeeds in sun or shade, the warmer the climate the more shade a plant requires. A pH between 4.5 and 5.5 is ideal. Succeeds in a woodland though, because of its surface-rooting habit, it does not compete well with surface-rooting trees. Plants need to be kept well weeded, they dislike other plants growing over or into their root system, in particular they grow badly with ground cover plants, herbaceous plants and heathers[200]. Plants form a root ball and are very tolerant of being transplanted, even when quite large, so long as the root ball is kept intact. Plants in this genus are notably susceptible to honey fungus.
Propagation:
Seed – best sown in a greenhouse as soon as it is ripe in the autumn and given artificial light. Alternatively sow the seed in a lightly shaded part of the warm greenhouse in late winter or in a cold greenhouse in April. Surface-sow the seed and do not allow the compost to become dry[200]. Pot up the seedlings when they are large enough to handle and grow on in a greenhouse for at least the first winter. Layering in late July. Takes 15 – 24 months[78]. Cuttings of half-ripe wood, August in a frame. Easy

Edible Uses:: A tea is made from the leaves and flower tips.

Medicinal Uses: Not yet known.

Known Hazards: Although no specific mention of toxicity has been seen for this species, it belongs to a genus where many members have poisonous leaves. The pollen of many if not all species of rhododendrons is also probably toxic, being said to cause intoxication when eaten in large quantities.
Disclaimer : The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplement, it is always advisable to consult with your own health care provider.

Resources:
http://www.pfaf.org/user/Plant.aspx?LatinName=Rhododendron+lapponicum
http://dnr.wi.gov/topic/EndangeredResources/Plants.asp?mode=detail&SpecCode=PDERI150G0
https://en.wikipedia.org/wiki/Rhododendron_lapponicum

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Artemisia annua

Botanical Name ; Artemisia annua
Family: Asteraceae
Genus: Artemisia
Species: A. annua
Kingdom: Plantae
Order: Asterales

Common Names :Sweet Wormwood,  Sweet Annie,  Sweet Sagewort or Annual Wormwood, Qing Hao

Habitat : Artemisia annua is native to temperate Asia, but naturalized throughout the world.
It occurs naturally as part of a steppe vegetation in the northern parts of Chahar and Suiyuan provinces in China, at 1000 to 1500 m above sea level.

Description:
Artemisia annua has fern-like leaves, bright yellow flowers, and a camphor-like scent. Its height averages about 2 m tall, and the plant has a single stem, alternating branches, and alternating leaves which range 2.5–5 cm in length. It is cross-pollinated by wind or insects. It is a diploid plant with chromosome number, 2n=18
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Cultivation:
An easily grown plant, succeeding in a well-drained circumneutral or slightly alkaline loamy soil, preferring a sunny position. Plants are longer lived, more hardy and more aromatic when they are grown in a poor dry soil. A fast-growing annual plant, it is tall but neat in habit with a handsome fragrant foliage and is useful for filling gaps at the back of a border. It has become a weed of waste places in many areas of the world. The plant is extremely vigorous and essentially disease and pest free. Qing Hao is a determinate short-day plant. Non-juvenile plants are very responsive to photoperiodic stimulus and flower about two weeks after induction. The critical photoperiod seems to be about 13.5 hours, but there are likely to be photoperiod x temperature interactions. In Lafayette Indiana, USA (40°21’N) plants flower in early September with mature seeds produced in October. The plant is not adapted to the tropics because flowering will be induced when the plants are very small. Most collections of artemisia derive from natural stands with highly variable artemisinin content, some as low of 0.01%. Selections from Chinese origin vary from 0.05 to 0.21%. Swiss researcher N. Delabays reports a clonal selection derived from Chinese material which produces 1.1% artemisin but is very late flowering; proprietary hybrids have been obtained with somewhat lower content but flower earlier. Members of this genus are rarely if ever troubled by browsing deer.

Propagation:
Seed – sow spring in a cold frame and plant out in late spring or early summer. Alternatively, the seed can be sown late spring in situ

Edible Uses: An essential oil in the leaves is used as a flavouring in spirits such as vermouth.

Medicinal Uses:
Qing Ho, better known in the West as sweet wormwood, is a traditional Chinese herbal medicine. An aromatic anti-bacterial plant, recent research has shown that it destroys malarial parasites, lowers fevers and checks bleeding.  Also used for heat stroke. Used as an infusion.  Externally the leaves are poulticed for nose bleeds, bleeding rashes, and sores.  Research in Thailand and the US shows that A. annua, in the preparation Artesun