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(Last Modified On 5/15/2013)
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(Last Modified On 5/15/2013)
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Species
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Juanulloa mexicana (Schlecht.) Miers
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PlaceOfPublication
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Ann. Mag. Nat. Hist., Ser. 2. 4: 188. 1849.
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Synonym
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Laureria mexicana Schlecht., Linnaea 8: 513. 1833. TYPE: (not seen). Juanulloa panamensis Miers, Ann. & Mag. Nat. Hist., ser. 2. 4: 190. 1849; Illustr. S. Amer. PI. 2: 41, tab. 46. 1857. TYPE: David, Veraguas, Costa Rica [Chiriqui, Panama], Seemann 1200 (BM; MO, photo). Juanulloa sargii Donn. Sm., Bot. Gaz. (Crawfordsville) 18: 5, tab. 1. 1893. TYPE: Guatemala, Donnell Smith 1467 (GH, MO, NY, US) . Juanulloa bicolor Gleason, Phytologia, 1: 37. 1933. TYPE: Lawrance 435 (A, NY, US).
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Description
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Vine or shrub, hemi-epiphytic; twigs drying a greenish buff color, irregularly striated and scaling. Leaves elliptic or oblong, to 20 cm long, broadest above the middle, coriaceous, smooth but with scattered echinoid or dendritic hairs on the midrib and lamina above, densely whitish fine-tomentose and perhaps glabrescent beneath; petioles channeled above, glabrous to densely pubescent.
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Habit
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Vine or shrub
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Description
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Inflorescence a contracted, subumbellate or corymbose panicle at the ends of branches; pedicels tomentose, 8-12 mm long. Flowers with the calyx 12-15 mm across at the base of the lobes, vestite outside with a yellow, orange or brownish, partly deciduous tomentum, split about halfway down into 5 ovate to oblong obes with acuminate tips and scattered hairs on the inside; corolla 3.5-4 cm long (Panama) and ca. 3 times as long as the calyx, tubular, conspicuously 5- ribbed or pleated, slightly expanded in the upper portion with a yellowish, stellate tomentum outside, glabrous within except for a villous area near the point of stamen insertion, the lobes ovate, ca. 5 mm long and glabrous within; stamens (Skutch 3841 (US), Costa Rica) on slender filaments inserted 5-8 mm above the base of the corolla tube, glabrous except for a massive basal tuft of hairs at the base, the anthers partly exserted, elongate, ca. 10 mm long, 1.5 mm thick at the broadest point, dehiscing longitudinally, basally hastate and apically with a short point, the connective dorsally marked by a dark (?purple) line; style slender, flattened, the stigma small, ellipsoid, situated at the level of the anther tips. Fruit (Allen 5519 (US), Costa Rica) a soft, conical or ovoid berry, 2 cm long, not exceeding the calyx lobes, the elongate slender style persistent; seeds large, reniform, 4-5 mm long.
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Note
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Living material of this species was not seen. Collectors report the calyx is orange or yellow, and the corolla is reddish orange or dark brown. Panamanian collections have somewhat smaller flowers than those of most Costa Rican or Colombian collections, but they appear to be well within the range for the species as a whole. Juanulloa ferruginea Cuatrec. of Colombia differs in having a conspicuous loose tomentum of large dendritic hairs on the petioles and leaf undersides, and it also has stout woody thickenings on the peduncles.
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Distribution
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Juanulloa mexicana apparently ranges from Colombia (Antioquia) to Mexico.
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Note
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Most collections from Costa Rica are from areas of deciduous forest and were growing in full sun. Two of the three Panamanian collections, however, are from high rainfall areas of Bocas del Toro with forests sparingly or not deciduous.
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Specimen
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BOCAS DEL TORO: Region of Almirante, Daytonia Farm, vine, Cooper 209 (F). Upper Changuinola, Changuinola Valley, Sanchez Potrero, epiphytic, Dunlap 585 (F, US). CHIRIQUI: David, Seemann 1200 (BM).
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