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Published In: Bulletin of the Torrey Botanical Club 55(8): 463–464. 1928. (Bull. Torrey Bot. Club) Name publication detail
 

Project Name Data (Last Modified On 8/11/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native

 

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6. Viburnum ozarkense Ashe (Ozark arrowwood)

Map 1442

Plants shrubs 2–4 m tall. Bark firm, not peeling, usually relatively smooth to finely roughened or warty, not fissured, gray or grayish brown to reddish brown. Winter buds ovoid-conical, slightly flattened, with 2 pairs of overlapping scales, glabrous, not or only slightly sticky. Stipules usually present but often shed early, partially fused to the basal portion of the petiole, linear, glandular. Petioles 5–22(–28) mm long, unwinged, with sparse to moderate minute, stalked glands and usually also scattered, unbranched hairs, lacking prominent glandular swellings near the tip. Leaf blades 7–18 cm long, 6–10(–14) cm wide, unlobed, relatively thin and papery, broadly ovate to nearly circular, rounded to truncate or shallowly cordate at the base, angled or short-tapered to a bluntly or more commonly sharply pointed tip, the margins coarsely toothed with the teeth 1–3 per cm, (10–)12–17 on each side, the surfaces moderately pubescent with short, unbranched hairs, most abundantly along the main veins, sometimes also sparsely and minutely glandular, often with 3–5 secondary veins on each side crowded near the base of the midvein, pinnately veined above the base, the secondary veins straight, often dichotomously branched but not forming a network, extending to the leaf margin, each branch ending in a tooth. Inflorescences short- to more commonly long-stalked, with 5–7 primary branches, these with moderate to dense, minute glands at flowering, sometimes also with scattered, unbranched hairs, the marginal flowers fertile and similar to the other flowers. Ovaries with dense, minute glands. Fruits 8–12 mm long, ellipsoid to oblong-ellipsoid and slightly flattened, bluish black, not glaucous. Nutlet 7–10 mm long, yellowish brown to reddish brown. 2n=36. May–June.

Uncommon, known thus far only from Howell and Oregon Counties (Missouri, Arkansas, Oklahoma). Ledges of dolomite bluffs and adjacent mesic upland forests.

This Ozark endemic often has been listed as a synonym of V. molle, but it is actually more similar to V. rafinesquianum. Weckman (2002), who resurrected the name as a segregate of V. molle, presented a great deal of comparative information on the morphology, range, and habitat of V. ozarkense.

 
 
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