• Source: Trigonidium (plant)

Trigonidium, abbreviated as Trgdm in horticultural trade, was a formerly accepted genus of orchids comprising roughly twenty species found from Mexico to Brazil. As of 2023, it was considered a synonym of Maxillaria.




Etymology


Trigonidium derives from the Greek "trigonon", meaning "triangle", in reference to the triangular shape of the flowers.




Description


The epiphytes and lithophytes formerly placed in the genus have long or short rhizomes. Its pseudobulbs are cylindrical or ovoid with overlapping sheathes at their base and one or two leaves at their apex. The inflorescences of the genus are basal, erect, and single flowered, with the flower usually as long or longer than the leaves. The flowers are tubular at the base with sepals spreading. The sepals are larger than the petals and the petals are larger than the lip. The lip is trilobed and not spurred.
The flowers have shiny pads and eyespots that lure male bees to perform pseudocopulation with the blossoms.




Former species


Former species include:

Trigonidium acuminatum = Maxillaria subrepens
Trigonidium amparoanum = Maxillaria luisae
Trigonidium callistele = Maxillaria egertoniana
Trigonidium christensonii = Maxillaria deherae
Trigonidium egertonianum = Maxillaria egertoniana
Trigonidium equitans = Maxillaria chartacifolia
Trigonidium grande = Maxillaria erikae
Trigonidium lankesteri = Maxillaria luisae
Trigonidium loretoense = Maxillaria briggittheae
Trigonidium macranthum = Maxillaria macrantha
Trigonidium monophyllum = Neocogniauxia monophylla
Trigonidium obtusum = Maxillaria obtusa
Trigonidium riopalenquense = Maxillaria soulangeana
Trigonidium seemannii = Maxillaria egertoniana
Trigonidium spatulatum = Maxillaria egertoniana
Trigonidium subrepens = Maxillaria subrepens
Trigonidium tenue = Maxillaria subrepens
Trigonidium turbinatum = Maxillaria turbinata




Cultivation


Plants formerly placed in the genus grow well in pots with standard epiphyte mix, in intermediate conditions with light shade and high humidity. Plants should be kept dry but not so dry that pseudobulbs shrivel.




References






External links


Wikispecies entry for Trigonidium (Orchidaceae)
Wikimedia Commons links for Trigonidium (Orchidaceae)

Kata Kunci Pencarian:

• Trigonidium (plant)
• Trigonidium
• Maxillaria obtusa
• Maxillaria egertoniana
• Maxillaria lineolata
• Maxillaria subrepens
• Maxillaria
• Taxonomy of the Orchidaceae
• Maxillariinae
• UPLB Museum of Natural History