Dracaena (plant)
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Dracaena (Template:IPAc-en[1]) is a genus of about 200 species of trees and succulent shrubs.[2] The formerly accepted genera Pleomele and Sansevieria are now included in Dracaena. In the APG IV classification system, it is placed in the family Asparagaceae,Template:Sfn subfamily Nolinoideae (formerly the family Ruscaceae).Template:SfnTemplate:Sfn It has also formerly been separated (sometimes with Cordyline) into the family Dracaenaceae or kept in the Agavaceae (now Agavoideae).
The name dracaena is derived from the romanized form of the Ancient Greek Script error: No such module "Lang". – drakaina, "female dragon".[3]
The majority of the species are native to Africa and the Canary Islands, southern Asia through to northern Australia, with two species in tropical Central America.
Description
Species of Dracaena have a secondary thickening meristem in their trunk, termed Dracaenoid thickening by some authors,Script error: No such module "Unsubst". which is quite different from the thickening meristem found in dicotyledonous plants. This characteristic is shared with members of the Agavoideae and Xanthorrhoeoideae among other members of the Asparagales.Script error: No such module "Unsubst".
Dracaena species can be identified in two growth types: treelike dracaenas (Dracaena fragrans, Dracaena draco, Dracaena cinnabari), which have aboveground stems that branch from nodes after flowering, or if the growth tip is severed, and rhizomatous dracaenas (Dracaena trifasciata, Dracaena angolensis), which have underground rhizomes and leaves on the surface (ranging from straplike to cylindrical).Script error: No such module "Unsubst".
Many species of Dracaena are kept as houseplants due to tolerance of lower light and sparse watering.[4]
Selected species
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- Dracaena aethiopica (Thunb.) Byng & Christenh.
- Dracaena afromontana Mildbr.
- Dracaena aletriformis (Haw.) Bos (syn. D. latifolia)
- Dracaena americana Donn.Sm. – Central America dragon tree
- Dracaena angolensis (Welw. ex Carrière) Byng & Christenh.
- Dracaena angustifolia (Medik.) Roxb.
- Dracaena arborea (Willd.) Link
- Dracaena arborescens (Cornu ex Gérôme & Labroy) Byng & Christenh.
- Dracaena aubrytiana (Carrière) Byng & Christenh.
- Dracaena aurea H.Mann
- Dracaena bagamoyensis (N.E.Br.) Byng & Christenh.
- Dracaena ballyi (L.E.Newton) Byng & Christenh.
- Dracaena braunii Engl. (syn. D. litoralis)
- Dracaena cinnabari Balf.f. – Socotra dragon tree
- Dracaena cochinchinensis (Lour.) S.C.Chen (syn. D. loureiroi)
- Dracaena draco (L.) L. – Canary Islands dragon tree
- Dracaena eilensis (Chahin.) Byng & Christenh.
- Dracaena ellenbeckiana Engl. - Kedong Dracaena (Ethiopia, Kenya, Uganda)[5][6][7]
- Dracaena elliptica Thunb. & Dalm.
- Dracaena fernaldii (H.St.John) Jankalski
- Dracaena forbesii (O.Deg.) Jankalski
- Dracaena fragrans (L.) Ker Gawl. (syn. D. deremensis) – striped dracaena, compact dracaena, corn plant, cornstalk dracaena
- Dracaena ghiesbreghtii W.Bull ex J.J.Blandy
- Dracaena goldieana Bullen ex Mast. & T.Moore
- Dracaena halapepe (H.St.John) Jankalski
- Dracaena hallii (Chahin.) Byng & Christenh.
- Dracaena hanningtonii Baker (syn. D. oldupai)
- Dracaena jayniana Wilkin & Suksathan
- Dracaena kaweesakii Wilkin & SuksathanTemplate:Sfn
- Dracaena konaensis (H.St.John) Jankalski
- Dracaena malawiana Byng & Christenh.
- Dracaena mannii Baker
- Dracaena masoniana (Chahin.) Byng & Christenh.
- Dracaena ombet Heuglin ex Kotschy & Peyr. – Gabal Elba dragon tree
- Dracaena ovata Ker Gawl.
- Dracaena pearsonii (N.E.Br.) Byng & Christenh.
- Dracaena pethera Byng & Christenh.
- Dracaena pinguicula (P.R.O.Bally) Byng & Christenh.
- Dracaena reflexa Lam. – Pleomele dracaena or "Song of India"
- D. reflexa var. marginata (syn. D. marginata) – red-edged dracaena or Madagascar dragon tree
- Dracaena rockii (H.St.John) Jankalski
- Dracaena sanderiana Engl. – ribbon dracaena, marketed as "lucky bamboo"
- Dracaena serrulata Baker – Yemen dragon tree
- Dracaena singularis (N.E.Br.) Byng & Christenh.
- Dracaena spathulata Byng & Christenh.
- Dracaena steudneri Engl.
- Dracaena stuckyi (God.-Leb.) Byng & Christenh.
- Dracaena suffruticosa (N.E.Br.) Byng & Christenh.
- Dracaena surculosa Lindl. – spotted or gold dust dracaena. Formerly D. godseffiana
- Dracaena tamaranae Marrero Rodr., R.S.Almeira & M.Gonzáles-Martin
- Dracaena transvaalensis Baker
- Dracaena trifasciata (Prain) Mabb.
- Dracaena umbraculifera Jacq.
- Dracaena viridiflora Engl. & K.Krause
- Dracaena zeylanica (L.) Mabb.
Formerly regarded as dracaena
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- Asparagus asparagoides (L.) Druce (as D. medeoloides L.f.)
- Cordyline australis (G.Forst.) Endl. (as D. australis G.Forst.)
- Cordyline fruticosa (L.) A.Chev. (as D. terminalis Lam.)
- Cordyline indivisa (G.Forst.) Steud. (as D. indivisa G.Forst.)
- Cordyline obtecta (Graham) Baker (as D. obtecta Graham)
- Cordyline stricta (Sims) Endl. (as D. stricta Sims)
- Dianella ensifolia (L.) DC. (as D. ensifolia L.)
- Liriope graminifolia (L.) Baker (as D. graminifolia L.)
- Lomandra filiformis (Thunb.) Britten (as D. filiformis Thunb.)[8]
Uses
Ornamental
Some shrubby species, such as D. fragrans, D. surculosa, D. marginata, and D. sanderiana, are popular as houseplants. Many of these are toxic to pets, though not humans, according to the ASPCA among others. Rooted stem cuttings of D. sanderiana are sold as "lucky bamboo", although only superficially resembling true bamboos.
Dracaena houseplants like humidity and moderate watering. They can tolerate periods of drought but the tips of the leaves may turn brown.[9] Leaves at the base will naturally yellow and drop off, leaving growth at the top and a bare stem.[9] Dracaena are vulnerable to mealybugs and scale insects.[9]
Other
A naturally occurring bright red resin, dragon's blood, is collected from D. draco and, in ancient times, from D. cinnabari. Modern dragon's blood is, however, more likely to be from the unrelated Calamus rattan palms, formerly placed in Daemonorops.Template:Efn It also has social functions in marking graves, sacred sites, and farm plots in many African societies.Template:Sfn
Gallery
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Dracaena tamaranae - native to Gran Canaria
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References
Notes
Citations
Sources
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Further reading
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External links
- Template:Commons category-inline
- Template:Wikispecies-inline
- Socotra botany Template:Webarchive. Royal Botanic Garden, Edinburgh.
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