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(Last Modified On 11/12/2012)
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(Last Modified On 11/12/2012)
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Species
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PLEUROTHALLIS BRIGHAMII S. Wats.
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PlaceOfPublication
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Proc. Am. Acad. 2 3:285. 1888
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Reference
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Ames, Sched. Orch. 7:19, t. 7. 1924.
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Synonym
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Pleurothallis barboselloides Schltr. in Fedde Rep. Sp. Nov. Beih. 17:18. 1922; loc. cit. 59: t. 29, fig. 113. 1931. Fig. 105. Pleurothallis Brighamii Pleurothallis periodica Ames, loc. cit. 7:21, t. 4. 1924. Pleurothallis acrisepala Ames & Schweinf. Sched. Orch. 8:22. 1925.
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Description
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Small, caespitose, epiphytic herbs up to 12 cm. tall. Secondary stems up to about 6 mm. long, very short and inconspicuous, enclosed by sheaths. Leaves 1.8-9 cm. long and 0.3-1.2 cm. broad, oblanceolate to linear-oblanceolate, obtuse or acute, attenuated to the base, coriaceous. Inflorescence a 1- to several-flowered fascicle borne on a long slender peduncle, up to 12 cm. long, subequal to or exceeding the leaves. - Flowers small, opening one at a time. Sepals connate for a short distance at the base; dorsal sepal 6-10 mm. long and 1.2-3 mm. broad, elliptic to oblong-lanceolate, obtuse to acuminate. Lateral sepals 6-9 mm. long and together 3-4.5 mm. broad, oblong to oblong- ovate, connate to the middle or beyond, acute. Petals 2-3.5 mm. long and 0.75-1.7 mm. broad, obliquely spatulate to obliquely oval, the anterior margin produced, acute or acuminate. Lip 2.1-4 mm. long and 0.8-2 mm. broad, oblong-ligulate to oblong-lanceolate, obtuse, the apex ciliate or denticulate, with an auriculate lateral lobe on either side near the base of the lamina, claw with a prominent callus.
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Distribution
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A not uncommon plant at low elevations from Guatemala to Panama.
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Specimen
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BOCAS DEL TORO: without locality, Wedel i85; Isla Colon, Wedel 486. CANAL ZONE: Barro Colorado Island, Kenoyer 256, Shattuck 205, 567; drowned forest between Tumba Vieja and Salamanca, Steyermark & Allen 16750; Salamanca Hydrographic Station, Wood- son, Allen & Seibert 1585; hills east of or near Panama City, alt. near sea-level, Powell 92, 2I9; Gatun Lake, Powell 275. DARIEN: vicinity of El Real, alt. about 15 m., Allen 943. PANAMA: Rio La Maestra, alt. 0-25 m., Allen 54; Rio TecAmen, north of Chepo Road, alt. about 30 m., Hunter & Allen 225; near Tapia River, Juan Diaz region, Maxon & Harvey 6699; Casa Ladre, San Juan, hills east of Panama City, Powell 274, 275, 420, 3508.
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Note
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Pleurothallis Brighamii is a variable species which may eventually prove to be the same as P. pyrsodes Reichb. f.
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