Trigonidium (plant)
''Trigonidium'', abbreviated as Trgdm in horticultural trade, is a genus of orchids comprising roughly twenty species found from Mexico to Brazil. Etymology ''Trigonidium'' derives from the Greek "trigonon", meaning "triangle", in reference to the triangular shape of the flowers. Description The epiphytes and lithophytes of 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 sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...s spreading. The sepals are larger than the petals and the petals are larger ...
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Trigonidium Acuminatum
''Maxillaria subrepens'' is an orchid found in tropical South America. Description ''Maxillaria subrepens'' is tall with fluted pseudobulbs and a narrow leaf that curves over at the tip. The flowering stem is slightly taller than the leaves, bearing a striped yellow-brown flower wide. The long sepals form a tubular flower that opens at the end. The reddish Eyespot (mimicry), eyespots of the small petals are located within the tube. These eyespots attract male bees to perform pseudocopulation with the orchid's blossom. The petals are ovoid and taper at the tip, and are similar in hue to the sepals. The lip and Column (botany), column are hidden within the tube. (As ''Trigonidium acuminatum''.) References

{{Taxonbar, from1=Q42747675, from2=Q42856805, from3=Q15472593 Orchids of South America Maxillariinae ...
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