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(Last Modified On 5/14/2013)
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(Last Modified On 5/14/2013)
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Species
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Lonicera japonica Thunb.
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PlaceOfPublication
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Fl. Jap. 89. 1784.
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Description
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Twining vine or shrub to 10 m long or more, trailing at ground level or festoon- ing on shrubs or small trees; stems terete, sometimes reddish on one side, loosely to densely pubescent with slender and stout simple hairs to 1 mm long, some hairs gland-tipped, the glands mostly transparent but drying reddish-brown, the hairs on the young parts retrorse. Leaves opposite, not connate, entire (lobed on juvenile plants), ovate, oblong, or elliptical, mostly widest at the middle or below, apically acuminate, acute or obtuse, often mucronulate, basally rounded, truncate
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Habit
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Twining vine or shrub
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Description
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or obtuse, often slightly oblique, mostly 4-7 cm long, ca. half as wide, glabrate to pilose with stout, simple, mostly eglandular hairs, the hairs with expanded bases above, the margin ciliate, the veins ca. 4 on each side of the midvein, the minor venation reticulate, conspicuous beneath, often obscure above; petiole 3-10 mm long, pilose, lenticular in cross section; small but well developed shoot buds evident in the leaf axils. Inflorescences numerous, axillary, appearing near the ends of the branches, pedunculate solitary pairs (dichasia) of closely positioned flowers subtended by pairs of foliaceous bracts; peduncles 1-2 cm long, not much altering in fruit, slightly compressed dorsally, pilose with short and long simple hairs, many hairs glandular; bracts variable in size, mostly 2-3 cm long and resembling the leaves; bractlets obtuse, about half to as long as the ovaries (ca. 1 mm), conspicuously ciliate with stout, 1 mm long hairs, sometimes hairy dor- sally; pedicels wanting. Flowers white fading yellowish, fragrant; ctlyx tube enclosing the ovary, the lobes ca. 1 mm long, lanceolate-deltoid, prominently ciliate, glabrous dorsally and ventrally; corolla 4-5 cm long, strongly 2-lipped, the tube ca. 2 cm long, slender, straight and broadening slightly upward, not saccate or ventricose, pubescent outside and in, with a yellow, gland-dotted, nectary extending along the inside of the tube from the base to about halfway up and situated along the junction of one of the sutures of the lower lip, the limb equalling or slightly exceeding the tube, the upper lip 4-lobed about halfway down, the lower lip distinct from the base of the limb; stamens sub-equal, the filaments white, glabrous, straight, tapering slightly near the apex, the upper 3 inserted at a slightly higher level than the dorsal 2, the anthers dorsifixed at ca. the middle, ca. 4 mm long, elongate, straight in bud but soon recurving at the ends into a 'U' shape; ovary 1.5-2 mm long, 3-loculed, the ovules 2-3 per locule, the style glabrous, the stigma green, discoid, not evidently lobed. Fruit5 a black, juicy, shiney berry crowned by the persistent calyx.
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Distribution
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Lonicera japonica is an almost cosmopolitan weed, transported to many countries by man as a cultivated ornamental.
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Note
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It belongs to a group of species (subsect. Longiflorae Rehd.) native to the Old World and itself native to eastern Asia. "Japanese honeysuckle" (English), "madreselva" (Spanish).
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Common
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Japanese honeysuckle madreselva
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Specimen
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CHIRIQUI: Cerro Punta, ca. 7000 ft, Blaisdell 378 (MO). Along trail N of Cerro Punta, abundant locally, Croat 10502 (MO). Weed in vegetable patch above Nueva Suisa, 6000 ft, D'Arcy 5335 (C, MO, UCWI).
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