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(Last Modified On 11/19/2012)
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(Last Modified On 11/19/2012)
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Genus
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DIACRIUM Lindl. ex Benth.
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PlaceOfPublication
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Jour. Linn. Soc. Lond. 18:312. 1881
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Reference
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Benth. & Hook. Gen. Pl. 3:526. 1883; Pfitzer in Engler & Prantl, Nat. Pflanzenf. II, 6:146. 1888.
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Synonym
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Epidendrum subg. Diacrium Lindl. in Hook. Jour. Bot. 3:81. 1841.
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Description
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Caespitose epiphytic or semi-epiphytic herbs. Stems pseudobulbose, solid or hollowed by insect action. Leaves at or near the apex of the pseudobulbs, few. (310) This content downloaded by the authorized user from 192.168.52.65 on Wed, 14 Nov 2012 13:06:30 PMAll use subject to JSTOR Terms and Conditions1946] FLORA OF PANAMA (Orchidaceae) 379 Fig. 137. Diacrium bilamellatum Inflorescence terminal, racemose, borne at the end of an elongated peduncle, few- to several-flowered. Sepals similar, free, spreading. Petals similar to the sepals. Lip free from the column and spreading, 3-lobed, provided with two horn-like processes toward the base which are hollow and open from the underside of the lip. Column short, footless, produced laterally into wings. Anther terminal, opercu- late; incumbent, 2-celled, the cells divided by a longitudinal septum; pollinia 4, laterally compressed, each one provided with a granular, viscid appendage.
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Note
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Diacrium is closely allied to Epidendrum, from which it is easily, if super- ficially, distinguished by the hollow horn-like processes on the lip. A small genus of four or five species.
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