Rosa bracteata

J. C. Wendland

Bot. Beob., 50. 1798.

Common names: Macartney rose
IllustratedIntroducedWeedy
Treatment appears in FNA Volume 9. Treatment on page 86.

Stems climbing or vinelike, sometimes decumbent, 30–50 dm; branches flexuous, brown; infrastipular prickles usually paired, broad-based, internodal prickles paired or single, reddish-brown, 4.5–9 × 6–9 mm. Leaves: stipules 3–4 × 2.5–3.5 mm, auricles 3–6 × 1.5–2 mm, surfaces tomentose; petiole and rachis with pricklets, glabrous or pubescent, usually stipitate-glandular; leaflets: base cuneate, margins 1-serrulate-crenulate, teeth 12–16 per side, broad-based, apex obtuse to acute, often apiculate, gland-tipped, abaxial surfaces green with scattered pricklets and stipitate-glands along prominent midveins, sometimes with hairs along midveins, eglandular, sometimes glabrous, adaxial glabrous, eglandular. Panicles lateral and terminal. Pedicels: bracts ovate-acuminate, (6–) 8–10 × 5–7 mm, margins densely white sericeo-tomentose. Flowers 5–7 (–10) cm diam.; hypanthium 5–7 × 8–9 mm; sepal margins sparsely glandular-ciliate, tip 2–5 × 1–2 mm; petals 20–35 × 20–30 mm; carpels apically pilose, exsert 2–2.5 mm beyond stylar orifice of hypanthial disc (1–2 mm diam.). Hips leathery. Achenes 30–40+, tan, 4–5 × 2–3 mm. 2n = 14.


Phenology: Flowering May–Oct.
Habitat: Disturbed areas, roadside hedges, open fields, pastures, bayou edges, ditches, along railways, woods, swampy thickets, pinelands
Elevation: 0–500 m

Distribution

V9 126-distribution-map.jpg

Introduced; Ala., Ark., Fla., Ga., La., Md., Miss., N.C., S.C., Tex., Va., Asia (China), Asia (s Japan), Asia (Taiwan), also in West Indies, Europe, Australia

Discussion

Rosa bracteata was introduced to Europe in 1795, and later to the United States, where it became widely naturalized and invasive in parts of the southeast, and in the West Indies. The species forms dense thickets of puberulent to tomentose stems; bracts, pedicels, and hips are densely sericeo-tomentose. The six to eight bracts closely subtend the short pedicels and tightly cover about half or all of the hypanthia.

Selected References

None.

Lower Taxa

None.

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

... more about "Rosa bracteata"
white-sericeous +, stipitate-glandular +, pubescent +  and glabrous +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2mm +  and 3mm +
gland-tipped +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
J. C. Wendland +
gray +, red +  and brown +
exfoliating +
compound +  and simple +
opposite +  and alternate +
cuneate +
1.4 cm14 mm <br />0.014 m <br /> (3 cm30 mm <br />0.03 m <br />) +
lustrous +  and dull +
smooth +  and rugose +
obovate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
? (?) +  and ? (?) +
5mm +  and 15mm +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
ovate-acuminate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
free +  and distinct +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
stoloniferous +
Macartney rose +
1-16(-50)-flowered +
stipitate-glandular +, densely puberulent +  and tomentose +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Md. +, Miss. +, N.C. +, S.C. +, Tex. +, Va. +, Asia (China) +, Asia (s Japan) +, Asia (Taiwan) +, also in West Indies +, Europe +  and Australia +
not +  and aggregated +
0–500 m +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
Disturbed areas, roadside hedges, open fields, pastures, bayou edges, ditches, along railways, woods, swampy thickets, pinelands +
white +  and orange-red +
0.7 cm7 mm <br />0.007 m <br /> (3 cm30 mm <br />0.03 m <br />) +
not setose +  and sericeo-tomentose +
oblong +, globose +  and subglobose +
leathery +
0.8 cm8 mm <br />0.008 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
conic +  and flat +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
sericeo-tomentose +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
leathery +  and fleshy +
0.8 cm8 mm <br />0.008 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1-16(-50)-flowered +
crassinucellate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
3-foliate +  and compound +
15 cm150 mm <br />0.15 m <br /> (18 cm180 mm <br />0.18 m <br />) +
semipersistent +  and persistent +
4.5 cm45 mm <br />0.045 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
leathery +
petiolulate +  and subsessile +
elliptic +  and obovate more or less oblong obovate-elliptic lanceolate-elliptic or obovate-oblong +
sericeo-tomentose +
1-serrulate-crenulate +
distinct +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1-16(-50)-flowered +
sericeo-tomentose +
all +  and 1/2 +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
free +  and distinct +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
stipitate-glandular +, pubescent +  and glabrous +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering May–Oct. +
adnate +, free +, connate +  and distinct +
broad-based +
Bot. Beob., +
stipitate-glandular +, pubescent +  and glabrous +
0.5 cm5 mm <br />0.005 m <br /> (?) +
not arillate +
deciduous +  and persistent +
free +  and distinct +
glandular-ciliate +
reflexed +  and spreading +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
rarely densely puberulent +  and tomentose +
Illustrated +, Introduced +  and Weedy +
free +  and distinct +
branched +  and simple +
vinelike +  and climbing +
1 +  and 20 +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
persistent +
not elongate +
glandular +  and eglandular +
Rosa bracteata +
Rosa sect. Bracteatae +
species +
stoloniferous +
2mm +  and 5mm +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
12 +  and 16 +
broad-based +
inconspicuous +
enlarged +  and small +
stoloniferous +  and rhizomatous +