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Home Orchids of Brisbane Aci. amplexicaulis Aci. caudatus Aci. exsertus Aci. fornicatus Arth. prolixus Bulb. elisae Bulb. exiguum Bulb. lamingtonense Bulb. minutissimum Bulb. schillerianum Bulb. shepherdii Caladenia Cal. triplicata Cla. major Clchs. campestris Clchs. robertsonii Chlglt. sp. Crybs. aconitiflorus Crybs. barbarae Crybs. fimbriatus Crybs. undulatus Crptst. erecta Crptst. subulata Cymbidium Den. aemulum Den. falcorostrum Den. gracilicaule Den. kingianum Den. monophyllum Den. schneiderae Den. speciosum Den. tetragonum Dipo. punctatum Dipo. roseum Dipo. variegatum Diuris abbreviata Diuris alba Diuris sulphurea Dockrillia Epgm. roseum Erio. autumnalis Eo. cassythoides Gta. sesamoides Geno. acuminatum Geno. nudiscapum Geno. sp Geod. densiflorum Gloss. major Gloss. minor Lip. coelogynoides Lip. habenarina Lip. swenssonii Mrs. parviflora Obrnia. titania Pbm. beckleri Perths. hillii Plrhz. tridentata Ptst. acuminata Ptst. baptistii Ptst. curta Ptst. erecta Ptst. grandiflora Ptst. hamata Ptst. hildae Pter. hispidula Pter. longifolia Pter. mutica Ptst. nutans Pter. obtusa Ptst. ophioglossa Ptst. rufa Ptst. russellii Ptst. woollsii Rhin. divitiflora Sarc. ceciliae Sarc. dilatatus Sarc. falcatus Sarc. hillii Sarc. olivaceus Sarc. spathulatus Sprnth. sinensis Tae. aff. lobatum Tae. muelleri Thel. ixioides Thel. nuda Thel. pauciflora Thel. purpurata Acknowledgements

 

 

Dendrobium tetragonum

Dendrobium tetragonum

Dendrobium tetragonum

This common epiphyte or occasional lithophyte grows in rainforests around Brisbane.

The pseudobulbs grow to 45cm by 9mm, thin at the base and broadening toward the tip. The pseudobulbs are distinctly square in cross section and are pendulous to semi-pendulous. There are up to 5 leathery apical leaves to 8cm by 25mm. The flowering stem grows to 4cm with up to five flowers.

Flowers are 25mm across with thin segments. The flowers are yellowish or greenish with red margins, sometimes with redish purple splotching.

This distinctive orchid can be easily identified by its square section tapering pseudobulbs and starry greenish yellow flowers with red margins. There is no other similar orchid which occurs in the Brisbane area which could be confused with this orchid.

 

Home ] Up ] Orchids of Brisbane ] Aci. amplexicaulis ] Aci. caudatus ] Aci. exsertus ] Aci. fornicatus ] Arth. prolixus ] Bulb. elisae ] Bulb. exiguum ] Bulb. lamingtonense ] Bulb. minutissimum ] Bulb. schillerianum ] Bulb. shepherdii ] Caladenia ] Cal. triplicata ] Cla. major ] Clchs. campestris ] Clchs. robertsonii ] Chlglt. sp. ] Crybs. aconitiflorus ] Crybs. barbarae ] Crybs. fimbriatus ] Crybs. undulatus ] Crptst. erecta ] Crptst. subulata ] Cymbidium ] Den. aemulum ] Den. falcorostrum ] Den. gracilicaule ] Den. kingianum ] Den. monophyllum ] Den. schneiderae ] Den. speciosum ] [ Den. tetragonum ] Dipo. punctatum ] Dipo. roseum ] Dipo. variegatum ] Diuris abbreviata ] Diuris alba ] Diuris sulphurea ] Dockrillia ] Epgm. roseum ] Erio. autumnalis ] Eo. cassythoides ] Gta. sesamoides ] Geno. acuminatum ] Geno. nudiscapum ] Geno. sp ] Geod. densiflorum ] Gloss. major ] Gloss. minor ] Lip. coelogynoides ] Lip. habenarina ] Lip. swenssonii ] Mrs. parviflora ] Obrnia. titania ] Pbm. beckleri ] Perths. hillii ] Plrhz. tridentata ] Ptst. acuminata ] Ptst. baptistii ] Ptst. curta ] Ptst. erecta ] Ptst. grandiflora ] Ptst. hamata ] Ptst. hildae ] Pter. hispidula ] Pter. longifolia ] Pter. mutica ] Ptst. nutans ] Pter. obtusa ] Ptst. ophioglossa ] Ptst. rufa ] Ptst. russellii ] Ptst. woollsii ] Rhin. divitiflora ] Sarc. ceciliae ] Sarc. dilatatus ] Sarc. falcatus ] Sarc. hillii ] Sarc. olivaceus ] Sarc. spathulatus ] Sprnth. sinensis ] Tae. aff. lobatum ] Tae. muelleri ] Thel. ixioides ] Thel. nuda ] Thel. pauciflora ] Thel. purpurata ] Acknowledgements ]