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(Last Modified On 6/14/2013)
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(Last Modified On 6/14/2013)
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Species
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Garcilassa rivularis Poepp. & Endlich.
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PlaceOfPublication
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Nov. Gen. Sp. P1. 3: 45, tab. 251. 1843.
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Note
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TYPE: Peru, Poeppig 1459 (B, if extant, US, photo).
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Description
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Erect herb to 1.3 m tall; stems slender, drying striate, puberulent with sparse, short hairs, lower nodes sometimes with a distinct intrapetiolar line; roots short and fibrous. Leaves--alternate but sometimes appearing opposite, ovate, to 10 cm long, apically acuminate, basally obtuse, the margins serrate, 3 principal veins diverging from just above the base, chartaceous, sparingly pubescent on each side; petiole slender, to 1.5 cm long. Inflorescences several, terminal or on short shoots below the apex, umbellate or weakly cymose paniculate aggregates of 3-12 heads; peduncles slender, puberulent, flexuous, to 3 cm long, foliaceous bracts often present; pedicels slender, mostly shorter than the heads, bracteoles pubescent, linear, scalelike. Heads small with few florets, discoid; involucral bracts 3-5, ovate-lanceolate, dorsally pubescent, unequal, to ca. 3 mm long; receptacle minute; paleas indurate, enveloping the florets, ca. 5 mm long, apically out-curving, acute, sometimes short-cuspidate, pubescent; florets 3-4, ca. 5 mm long, the corolla narrowly campanulate, ca. 3 mm long, pubescent outside with appressed, ascending white hairs, the 5 lobes narrowly deltoid, the anthers black, ca. 1.2 mm long, the appendages narrowly deltoid, black at least in part, the basal auricles obscured by a thickening of the filament apex which gives the anther a truncate appearance, the style branches recurved, flattened-deltoid with a short-cuspidate apex, pubescent inside and out, the dorsal surface of the area just below the dichotomy black, the style base expanded-ellipsoid, basally truncate but slightly immersed in the short, cylindrical nectary, the ovary compressed. Achene brown, 3 mm long, only slightly flattened, not veined, reddish brown, evenly pubescent with numerous, short, ascending hairs, the bases of which appear glandular; pappus a ring of minute scales.
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Habit
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herb
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Note
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This species may be recognized by its small heads of few, palea-enclosed florets and by the plump, pubescent achenes which lack longitudinal veins. Collector's notes record flower color as greenish yellow, green or greenish, but in dried condition, the corolla and the dorsal surface of the style branches appear blackish.
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Distribution
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ranges from Costa Rica to Peru and Bolivia.
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Specimen
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BOCAS DEL TORO: Rio Teribe, near Quebrada Lukulon, Kirkbride & Duke 518 (MO). Rio Cricamola, 10-50 m, Woodson et al. 1821 (MO). CANAL ZONE: Between Friioles and Monte Lirio, Killiv 12163 (NY, US). CHrRIQUi: 1 mi E of Canias Cordas near Costa Rican border on road to Volcan, Croat 22343 (MO). DARIEN: Cania vic., 2000-6500 ft, Williams 955 (NY, US). PANAMA: Confluence of Rio Pacora and Rio Corso, ca. 450 m, Duke 11966 (MO). Junction of Rio Pacora to headwaters of Rio Corso, Oliver 2372 (MO).
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