TROPICAL PLANT ENCYCLOPEDIA


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Vachellia cornigera, Acacia cornigera, Bullhorn Acacia

Vachellia cornigera, Acacia cornigera

Bullhorn Acacia
Family: Fabaceae
Subfamily: Mimosoideae
Origin: Central America, Mexico
Small tree 10-20 ftFull sunModerate waterDry conditionsYellow/orange flowersAttracts butterflies, hummingbirdsThorny or spiny

Bullhorn Acacia is best known for its symbiotic relationship with a species of Pseudomyrmex ant (Pseudomyrmex ferruginea) that lives in its hollowed-out thorns. Its species were considered members of genus Acacia until 2005.





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Vachellia sieberiana, Acacia sieberiana, Paperbark Thorn

Vachellia sieberiana, Acacia sieberiana

Paperbark Thorn
Family: Fabaceae
Subfamily: Mimosoideae
Origin: South Africa
Small tree 10-20 ftFull sunModerate waterDry conditionsYellow/orange flowersEthnomedical plant.
Plants marked as ethnomedical and/or described as medicinal, are not offered as medicine but rather as ornamentals or plant collectibles.
Ethnomedical statements / products have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. We urge all customers to consult a physician before using any supplements, herbals or medicines advertised here or elsewhere.Attracts butterflies, hummingbirds

Drought-tolerant; suitable for xeriscaping.

This tree is easily propagated from seed that has been immersed in boiling water and soaked overnight. Protect young plants from frost. They are suited to medium to large gardens. Allow these magnificent trees the space to show off their wonderful shapes - don't crowd and clutter them.

This tree is half-hardy and very fast-growing with fertile soil and sufficient water, and tolerates temperatures ranging from about -2C to +40C.





Link to this plant:
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Welwitschia mirabilis, Welwitschia, Tumboa

Welwitschia mirabilis

Welwitschia, Tumboa
Family: Welwitschiaceae
Origin: Namib Desert
Groundcover and low-growing 2ftFull sunModerate waterDry conditionsOrnamental foliage

This is a strange, bizarre desert plant which grows from a short, thick trunk, with only two leaves that continuously grow from their base, and a long, thick taproot. After germination, the cotyledons grow to 25-35 mm in length, and are followed shortly afterwards by the appearance of the two permanent leaves. These leaves are produced opposite that of the cotyledons, and continue to grow throughout the life of the plant, eventually growing to 2-4 m long and usually becoming split into several strap-shaped sections.





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Xanthorrhoea sp., Grass Tree
Xanthorrhoea australis

Xanthorrhoea sp.

Grass Tree
Family: Xanthorrhoeaceae
Origin: Australia
Large shrub 5-10 ftFull sunModerate waterDry conditionsOrnamental foliageSubtropical, cold hardy at least to 30s F for a short time

The name of genus Xanthorrhoea comes from the Greek Xanthos for yellow and rheo meaning flow, referring to a yellow resin exuded from the trunk of some species of Xanthorrhoea.

The Xanthorrhoea genus is part of the Xanthorrhoeaceae family, which is made up of small trees or perennials with woody stems. The leaves are tough and linear, and the flowers are radially symmetrical, bisexual, and spike-like.

Commonly called Grass Trees, Xanthorrhoea plants are also known as Balga Grass to the Australian aborigines, which is their word for black boy. The Aborigines probably called these plants balga because after a wild fire, the bottom leaves burn away revealing a singed black trunk with long green reed-like leaves extending from the top of the trunk giving the appearance of black figures. All species of Xanthorrhoea are very slow growing, but they are also very long lived - up to 600 years! Long straight spears of white blossoms extend from the top of the tree especially in the year following wild fires.

The glassy resin which exudes from the trunks was previously used in varnish and other products. The flakes of resin were collected from around the base of the stem, heated and rolled into balls.The flowering spikes of the grass tree were soaked in water to make a sweet drink, fresh or slightly fermented. The soft bases of the young leaves were eaten. Tough leaves were used as knives. Europeans harvested the gum to make varnishes and lacquers.

Generally frost tolerant, all Xanthorrhoea require well-drained soil and a sunny location because they are prone to root rot. They can be grown very successfully in pots.





Link to this plant:
https://toptropicals.com/catalog/uid/xanthorrhoea_sp.htm

Xanthorrhoea australis - seeds

Grass Tree. Commonly called Grass Trees, Xanthorrhoea plants are also known as Balga Grass to the Australian aborigines, which is their word for black boy. The Aborigines probably called these plants balga because after a wild fire, the bottom leaves burn away revealing a singed black trunk with long green reed-like leaves extending from the top of the trunk giving the appearance of black figures. All species of Xanthorrhoea are very slow growing, but they are also very long lived - up to 600 years! Long straight spears of white blossoms extend from the top of the tree especially in the year following wild fires. The flowering spikes of the grass tree were soaked in water to make a sweet drink, fresh or slightly fermented. The soft bases of the young leaves were eaten. Europeans harvested the gum to make varnishes and lacquers. Can be grown very successfully in pots.
Place seeds on top of soil surface, using draining potting mix plus sand, keep warm, only slightly moist and in bright light. Seeds can not be kept wet.
Ordering seeds info

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Yucca sp., Yucca, Adams Needle

Yucca sp.

Yucca, Adams Needle
Family: Asparagaceae   (Formerly:Agavaceae / Amaryllidaceae)
Subfamily: Agavoideae
Large shrub 5-10 ftFull sunModerate waterDry conditionsWhite/off-white flowersOrnamental foliageAttracts butterflies, hummingbirdsSubtropical, cold hardy at least to 30s F for a short timeSeaside, salt tolerant plant

Yucca is easy to grow in any well drained soil, acidic or alkaline, and it is moderately tolerant of salt spray and salty soils. Light: tolerates full sun to shade. Moisture: highly tolerant of drought. Propagation: Propagate yuccas from seeds or cuttings.





Link to this plant:
https://toptropicals.com/catalog/uid/yucca_sp.htm
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