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Published In: Journal of the Horticultural Society of London 1: 153–154. 1846. (J. Hort. Soc. London) Name publication detail
 

Project Name Data (Last Modified On 8/25/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

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1. Jasminum nudiflorum Lindl. (winter jasmine)

Map 2101

Plants shrubs, 0.4–1.5 m tall (but the spreading stems up to 5.0 m long), with perfect flowers. Main stems numerous, intricately branched, mostly loosely ascending to spreading or arched, sometimes rooting at the tip, rarely climbing on other vegetation, the bark tending to remain dark green, but eventually turning purplish brown to dark brown or brown with age, smooth or with a few, irregular, longitudinal furrows. Twigs relatively slender, dark green or occasionally purplish- or brownish-tinged, glabrous, 4-angled in cross-section (usually with 4 slender ridges), with the leaf scars not or only slightly raised and the lenticels inconspicuous, small, and not raised. Terminal buds narrowly ovoid to narrowly ellipsoid, with several, overlapping, sharply pointed scales, the axillary buds similar to the terminal ones. Leaves opposite, short-petiolate to nearly sessile. Leaf blades mostly ternately compound (simple leaves often present at the bases of branchlets), 0.7–3.0 cm long, 0.4–1.5 cm wide, the blade or leaflets ovate to oblong-obovate or less commonly nearly circular, angled or short-tapered at the blunt tip (sometimes with an abrupt, minute, sharp point at the very tip), angled at the base, the margins entire but usually minutely hairy, the upper surface dark green, glabrous, and shiny, the undersurface sometimes slightly lighter green and glabrous. Inflorescences axillary, of solitary flowers, developing before the leaves, each usually with 1 or few, small, sepaloid bract(s), the flowers with slender stalks 2–6 mm long, not fragrant. Calyces deeply 5- or 6-lobed, 4–6 mm long, the lobes narrowly lanceolate to narrowly oblong-lanceolate, often strongly reddish-tinged. Corollas 5- or 6-lobed less than 1/2 way to the base, more or less trumpet-shaped (the tube often slightly curved), the lobes elliptic to oblong-elliptic or oblong-obovate, yellow (the outer surface and the tube frequently reddish-tinged). Style 2–5 mm long, either with a solitary, capitate stigma or more commonly with a pair of ascending branches at the tip. Fruits berries, 5–7 mm long, ellipsoid to ovoid, olive green, turning blackish with age, glabrous. 2n=26, 52 (possibly also 2n=29, 34, 48). February–March.

Introduced, known thus far from a single site in Taney County (native of Asia, introduced uncommonly and sporadically in the eastern half of the U.S.). Glades; also old homesites.

Jasminum nudiflorum is most often grown as a mounding ground cover, but sometimes is trained on trellises or staked into an upright form. The flowers appear in the late winter, when few other plants are flowering. It is also used in bonsai, where it is trained into a small treeform plant with weeping branches. In Missouri it is not cultivated as frequently as it is farther south, as it is only semihardy from USDA Hardiness Zone 5 northward (for a chart of hardiness zones, see the introductory section on climate of Missouri in Volume 1 of the present work [Yatskievych, 1999]). The first Missouri record was collected in 2004 by Michael Skinner of the Missouri Department of Conservation at a site near Branson where plants apparently had escaped from a planting at an old homesite and colonized an adjacent dolomite glade.

Some botanists segregate a dwarfed, prostrate variant of the species that occurs at high elevations in southwestern China as var. pulvinatum (W.W. Sm.) Kobuski.

 


 

 
 
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