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(Last Modified On 1/4/2013)
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(Last Modified On 1/4/2013)
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Genus
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BULBOPHYLLUM du Petit-Thouars
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PlaceOfPublication
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Hist. Pl. Orch. Iles Aust. d'Afr., Tabl. des Espec. III, t. 93-110. 1822
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Reference
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Benth. & Hook. Gen. Pl. 3:501. 1883.
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Synonym
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Didactyle Lindl. in Fol. Orch. 1:57. 1852. Bolbophyllaria Rchb. f. in Bot. Zeit. 10:934. 1852.
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Description
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Epiphytic herbs, with short, subconic or angulate, 1- to 2-leaved pseudobulbs often widely spaced along a creeping rhizome. Inflorescences erect or arching spikes or racemes produced from the base of the pseudobulbs. Flowers numerous, inconspicuous, subtended by a bract, free on short pedicels or sessile in shallow pits on the fleshy peduncle. Sepals free, or the laterals connate and obliquely dilated at the base, adnate to the foot of the column. Petals smaller than the sepals, with entire or ciliate margins. Lip simple, fleshy, or with a thickened basal callus, con- tracted at the base and hinged to the column foot. Column short, erect, produced at the base into a foot. Anther terminal, operculate, incumbent, depressed-hemis- pherical or obtusely conical, usually 2 celled; pollinia normally 4, waxy, in pairs in the cells of the anther.
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Note
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There is an extensive list of additional generic synonyms which are not cited because they apply to Old World members of the genus. Since nearly the entire genus is of Old World tropical distribution, where it attains a polymorphic devel- opment similar to that of Epidendrum in the Americas, it seems futile to attempt a generic description here which will cover the maximum possible limits of floral and vegetative structure. The few species found in the American tropics bear little resemblance to their Old World relatives, and might, for all practical pur- poses, be separated; but in this case, as in many others, it seems best to follow established usage. The description as given here is intended only to cover the two Panama species, which are identical in superficial appearance, but differ markedly in the size and shape of the petals, and to a lesser extent in the size and form of the lip.
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Key
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a. Petals acuminate to aristate, exceeding the length of the column; nearly equaling the sepals ..1. B. ARISTATUM aa. Petals obtuse, scarcely equaling the length of the column, less than half the length of the sepals .............. 2. B. PACHYRRHACHIS
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