Rosa acicularis

Lindley

Ros. Monogr., 44, plate 8. 1820.

Common names: Acicular rose
Illustrated
Treatment appears in FNA Volume 9. Treatment on page 114. Mentioned on page 96, 107, 112.

Shrubs, forming dense thickets. Stems erect, stout, (3–) 10–20 (–25) dm, sparsely or densely branched distally; bark pale-brown with tips dull red, glabrous; infrastipular prickles absent, internodal prickles dense, erect, subulate, terete, ± flattened, 9 × 4 mm, sparsely stipitate-glandular, mixed with dense aciculi. Leaves 5.5–15 cm; stipules 20–25 × 3–8 mm, auricles flared or erect, 5–7 mm, margins usually entire, stipitate-glandular, surfaces glabrous, sometimes puberulent, sparsely sessile-glandular or eglandular; petiole and rachis usually (rarely) with pricklets, glabrous or puberulent to pubescent, sessile-glandular; leaflets 5–7 (on annual shoots), terminal: petiolule 6–20 mm, blade elliptic, ovoid, or ovatelanceolate, 20–60 × 13–32 mm, firm, margins 1 (–2+) -dentate-serrate, teeth 11–25 per side acute or obtuse, gland-tipped or eglandular, apex acute or obtuse, abaxial surfaces light green, glabrous or puberulent (on main veins), eglandular or sparsely to densely sessile-glandular, adaxial green, dull, glabrous or sparsely hairy. Inflorescences corymbs, 1 or 2 (or 3) -flowered. Pedicels reflexed as hips mature, slender, (13–) 20–28 (–35) mm, glabrous, stipitate-glandular or eglandular; bracts 1–3, ovoid, 18–22 × 4–14 mm, margins entire, sessile or short-stipitate-glandular, surfaces glabrous, sometimes hairy, eglandular. Flowers 3–6 cm diam.; hypanthium ovoid to oblong, 5–8 × 4–6 mm, glabrous, eglandular, neck 1 × 2.5–3 mm; sepals spreading, often beak-capped, lanceolate, 20–33 × (2.5–) 3–3.5 mm, tip 7–12 × 0.5–0.8 mm, margins entire, sometimes pinnatifid, abaxial surfaces glabrous, sometimes pubescent, eglandular or stipitate-glandular (north); petals single, rose-pink to pale-pink, (13–) 22–25 × (11–) 20–25 mm; stamens 75–100; carpels 18–33, styles exsert 1 mm beyond stylar orifice (2 mm diam.) of ± flat hypanthial disc (3.5–4.5 mm diam.). Hips orange-red to bright red or blue-purple, globose to ellipsoid or urceolate, 10–23 × 9–11 mm, fleshy, glabrous, eglandular, neck 1–2 × 2–2.5 mm; sepals persistent, erect, often beak-capped. Achenes basiparietal, 14–25, tan, 4 × 2–2.5 mm.

Distribution

V9 169-distribution-map.jpg

Alta., B.C., Man., N.B., N.S., N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Colo., Iowa, Maine, Mass., Mich., Minn., Mont., N.Dak., N.H., N.Y., S.Dak., Vt., W.Va., Wis., Wyo., Eurasia

Discussion

Subspecies 2 (2 in the flora).

Rosa acicularis is circumpolar in forests of Eurasia and North America. Octoploid subsp. acicularis occurs from Sweden across northern Russia to Outer Mongolia, northern China, Korea, and Japan; hexaploid subsp. sayi is found throughout northern North America. The two subspecies meet in an intergradation zone from eastern Siberia to Alaska, and perhaps Yukon (W. H. Lewis 1958), where ploidy level is required for subspecies or hybrid confirmation.

Selected References

None.

Key

1 Pedicels densely stipitate-glandular; leaflets 5 (or 7), margins 1(–2+)-dentate-serrate; sepal abaxial surfaces usually stipitate-glandular. Rosa acicularis subsp. acicularis
1 Pedicels usually eglandular, if stipitate-glandular, not to apex or stipitate glands mostly sparse; leaflets 5–7, margins 1–2-dentate-serrate; sepal abaxial surfaces usually eglandular. Rosa acicularis subsp. sayi

"thin" is not a number."dm" is not declared as a valid unit of measurement for this property.

... more about "Rosa acicularis"
eglandular +, eglandular or +  and sparsely densely sessile-glandular +
stipitate-glandular +, pubescent +, glabrous +  and puberulent +
4 cm40 mm <br />0.04 m <br /> (?) +
basiparietal +  and basal +
2mm +  and 2.5mm +
hairy +  and glabrous +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
Lindley +
red +  and pale-brown +
exfoliating +
compound +  and simple +
opposite +  and alternate +
not cuneate +
4 cm40 mm <br />0.04 m <br /> (6.3 cm63 mm <br />0.063 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
lustrous +  and dull +
ovatelanceolate +, ovoid +  and elliptic +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
13mm +  and 32mm +
persistent +
1.8 cm18 mm <br />0.018 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
free +  and distinct +
Acicular rose +
1-16(-50)-flowered +
rarely puberulent +  and tomentose +
rarely puberulent +  and tomentose +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, N.Dak. +, N.H. +, N.Y. +, S.Dak. +, Vt. +, W.Va. +, Wis. +, Wyo. +  and Eurasia +
not +  and aggregated +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
1.8 cm18 mm <br />0.018 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
orange-red +  and bright red or blue-purple +
1 cm10 mm <br />0.01 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
globose +  and ellipsoid or urceolate +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
conic +  and flat +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
purplish black +, purplish red +, orange-red +  and red +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
leathery +  and fleshy +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
1-16(-50)-flowered +
crassinucellate +
9 cm90 mm <br />0.09 m <br /> (?) +
stipitate-glandular +
flattened +, terete +  and subulate +
4 cm40 mm <br />0.04 m <br /> (?) +
3-foliate +  and compound +
11 cm110 mm <br />0.11 m <br /> (17 cm170 mm <br />0.17 m <br />) +
deciduous +
5.5 cm55 mm <br />0.055 m <br /> (15 cm150 mm <br />0.15 m <br />) +
leathery +  and membranous +
petiolulate +  and subsessile +
elliptic +  and obovate more or less oblong obovate-elliptic lanceolate-elliptic or obovate-oblong +
entire +  and 1(-2+)-dentate-serrate +
short-stipitate-glandular +  and stipitate-glandular +
pinnatifid +
distinct +
1mm +  and 2mm +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1-30(-50)-flowered +
2.8 cm28 mm <br />0.028 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
stipitate-glandular +  and glabrous +
2 cm20 mm <br />0.02 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (2 cm20 mm <br />0.02 m <br />) +
free +  and distinct +
2.2 cm22 mm <br />0.022 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
puberulent +  and pubescent +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
adnate +, free +, connate +  and distinct +
mixed +  and paired +
declined +  and erect +
subulate +, deltate +, terete +  and hooked +
Ros. Monogr., +
puberulent +  and pubescent +
0.5 cm5 mm <br />0.005 m <br /> (?) +
not arillate +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
persistent +
free +  and distinct +
erect +  and spreading +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
rarely densely puberulent +  and tomentose +
obtuse +  and acute +
Illustrated +
free +  and distinct +
flexuous +
procumbent +  and sprawling +
1 +  and 20 +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
persistent +
not elongate +
1 cm10 mm <br />0.01 m <br /> (?) +
eglandular +  and sessile-glandular +
hairy +, glabrous +  and puberulent +
Rosa sect. Cinnamomeae +
Rosa acicularis +
Rosa sect. Rosa +
species +
7mm +  and 12mm +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
eglandular +  and gland-tipped +
11 +  and 25 +
inconspicuous +
enlarged +  and small +
rhizomatous +  and open +
small +  and miniature +