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(Last Modified On 5/8/2013)
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(Last Modified On 5/8/2013)
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Species
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Parathesis glabra Donn. Sm.
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PlaceOfPublication
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Bot. Gaz. (Crawfordsville) 31: 115. 1901. FIG. 8.
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Synonym
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Parathesis storkii Standley, Publ. Field Mus. Nat. Hist., Bot. Ser. 8: 31. 1930.
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Description
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Shrubs or slender trees to 15 m high, the branchlets stout, apically tomentose with minute closely appressed stellate trichomes. Leaves with petioles to 1.8 cm long; leaf blades elliptic, oblong-elliptic, or oblanceolate-elliptic, 8-15 cm long and 3.5-7 cm wide, subabruptly acuminate apically, acute or acuminate This content downloaded from 192.104.39.2 on Tue, 7 May 2013 17:30:52 PMAll use subject to JSTOR Terms and Conditions304 ANNALS OF THE MISSOURI BOTANICAL GARDEN [VOL. 58 and decurrent basally, subchartaceous, entire or obscurely crenulate, black- punctate, striolate, minutely appressed stellate-lepidote beneath at first and along the petiole, glabrescent early, the costa nearly plane above, elevated beneath, the primary lateral veins slender. Inflorescences axillary, rarely terminal (White 156, MO), paniculate, 5-18 cm long, usually shorter than the leaves, slender-pedunculate usually to the middle or above, 1- or 2-branched, sparsely and minutely puberulent at first, glabrescent early; pedicels slender, to 1 cm long. Flowers sub-umbellate to corymbose, to 7 mm long at anthesis, the corolla minutely papillose-puberulent; sepals minutely puberulent, densest apically, lanceolate-triangular, 1.2-2 mm long, acuminate, densely red-black punctate; petals linear-lanceolate, ca. 7 mm long, papillose-tomentose on the inner surface except basally, densely black-punctate in lines; stamens 3-4 mm long, the filaments thick, black-punctate, to 2 mm long, the anthers ovate- lanceolate, to 2.75 mm long, dorsifixed ca. 1/4 above the base, tapering to the acute apex, conspicuously black-punctate dorsally, the glands extending down into the lobes; ovary ovoid, glabrous or sparsely short villous apically and at the base of the style; the ovules 7-9, uniseriate, enclosed, the placenta obovoid, apiculate, the style 4.5-6 mm long, black-punctate in lines. Fruit depressed-globose, drying ca. 8 mm in diameter.
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Habit
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Shrubs or slender trees
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Distribution
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Costa Rica and Panama.
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Specimen
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CHRIQuTI: Bajo Chorro, rain forest, 6000 ft, Davidson 379 (A, F, MO, US). Boquete, Volcan de Chiriqui, 7000 ft, Davidson 907 (A, F, MO, US). 6 mi. NE of El Volcan, 7000- 7500 ft, Tyson 811, 819, 820 (all MO). Vicinity of "New Switzerland," central valley of the Rio Chiriqui Viejo, 18002000 m, Allen 1352 (GH, LL, MO, NY, US). Rio Chiriqui Viejo valley, G. White 58 (GH, LL, MO); near river on island, P. White 156 (LL, MO). Volcan de Chiriqui, vicinity of Casita Alta, ca. 1500-2000 m, Woodson et al. 798 (A, K, MO, MICH); Potrero Muleto to summit, 3500-4000 m, Woodson & Schery 384 (GH, LL, MO).
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Note
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The Panama population of Parathesis glabra from Chiriqui is atypical in that the anthers are smaller, the filaments longer, and the petals are papillose basally within. Also, the leaves are smaller and narrower, and the inflorescences shorter than in P. glabra in Costa Rica.
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