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Published In: Gentes Herbarum; Occasional Papers on the Kinds of Plants 2(7): 463–464, f. 203. 1932. (Gentes Herbarum) Name publication detail
 

Project Name Data (Last Modified On 9/22/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native

 

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16. Rubus deamii L.H. Bailey

Map 2514

Canes to 250 cm long and 50 cm tall, 3–5 mm in diameter. Primocanes rarely with gland-tipped hairs. Prickles moderate to dense, (2–)3–5(–8) per cm of cane, (1–)2–3 mm long. Petioles with nonglandular hairs, occasional gland-tipped hairs and downward-curved prickles to 2 mm long. Stipules 8–12 mm long, linear-lanceolate, glandular. Primocane leaves mostly with 3 leaflets, rarely with 5, margins irregularly, doubly serrate, upper surface thinly hairy, the undersurface velvety hairy. Central primocane leaflets (4.0–)5.0–6.5(–7.0) cm long and (2.5–)3.0–4.0(–4.5) cm wide, ovate to elliptic, base rounded to subcordate, tapered to a sharply pointed tip, the leaflet stalk about 1/6–1/4 as long as the leaflet blade; middle leaflets ovate to elliptic; basal leaflets ovate, often asymmetrically lobed, base rounded, angled to a sharply pointed tip. Inflorescences (4–)6–11(–12) cm long, with 1–6 flowers on ascending stalks, with (1)2 or 3(–5) leafy bracts, about evenly divided between simple bracts and those with 3 leaflets; flower and inflorescence stalks with nonglandular and glandular hairs, and small downward-angled, needlelike prickles. Sepals 7–8 mm long and 3.0–3.5 mm wide, oblong, tapered to a sharply pointed tip or abruptly tapered to a short, slender point. Petals 8–14 mm long, obovate. Fruits 9–10 mm long, 9–10 mm wide, globose. April–May.

Uncommon, known thus far only from a single historical collection from Ste. Genevieve County (central U.S. from Virginia and West Virginia west to Indiana, Kentucky, and Tennessee, disjunct in Missouri). Bases of sandstone bluffs.

The Missouri record dates to 1933 to a specimen of primocane and floricane material gathered by Julian Steyermark near Chimney Rocks in a bluffy area with large sandstone boulders. The specimens originally were determined as R. invisus (see discussion under the sect. Flagellares treatment above).

 
 


 

 
 
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