Rosa sect. Systylae

de Candolle

Cat. Pl. Hort. Monsp., 137. 1813.

Treatment appears in FNA Volume 9. Treatment on page 82. Mentioned on page 78, 84.

Shrubs, sometimes forming thickets; stoloniferous. Stems erect to procumbent, climbing, vinelike, (10–) 15–30 (–100) dm; distal branches glabrous, eglandular; prickles infrastipular and/or internodal, single or paired, usually curved or declined, sometimes erect, flattened, ± stout, sometimes mixed with aciculi, rarely absent. Leaves deciduous or semipersistent, 5–12 cm, membranous or leathery; stipules persistent, adnate to petiole, auricles flared or erect, margins lacinulose, sometimes entire, eglandular or stipitate-glandular; leaflets 3–9 (–11), terminal: petiolule 5–16 mm, blade elliptic, ovate, elliptic-ovate, or obovate, 10–48 (–70) × 8–27 (–40) mm, abaxial surfaces glabrous or pubescent to tomentose, eglandular, sometimes glandular, adaxial dull or lustrous. Inflorescences panicles, 1–6 (–30+) -flowered. Pedicels erect, slender, 5–25 mm, glabrous or pubescent, eglandular or stipitate-glandular; bracts persistent, 1–3, margins lacinulose, stipitate-glandular. Flowers 1.5–5 cm diam.; hypanthium ovoid, oblong, or urceolate, glabrous, eglandular or stipitate-glandular; sepals persistent, reflexed, ovate-acuminate or lanceolate, 6–18 × 1–4 mm, margins entire or (outer) pinnatifid, abaxial surfaces glabrous or pubescent, eglandular or stipitate-glandular; petals single or double, pink, rose-purple, or white; carpels 6–25, styles connate in columns, exsert 3–6 mm, sometimes ± free with age, glabrous or pilose, stylar orifice 0.5–2 mm diam., hypanthial disc conic, 2–4 mm diam. Hips red or orange-red, usually globose, sometimes ovoid or subglobose, (4–) 5–10 × 5–9 mm, glabrous, eglandular or sparsely stipitate-glandular; sepals late deciduous, reflexed. Achenes basiparietal.

Distribution

North America, Europe, Asia (primarily China), n Africa, in Mexico, West Indies, Central America, South America, Pacific Islands (New Zealand), Pacific Islands (Philippines)

Discussion

Species ca. 35 (3 in the flora).

Other species of sect. Systylae, hybrids, and cultivars that spread by stoloniferous shoots and are mostly sterile have escaped from cultivation and are occasionally found. One is Rosa sempervirens Linnaeus, evergreen rose, native to southern Europe, Asiatic Turkey, and northern Africa and found in California (B. Ertter and W. H. Lewis 2008); introduced in 1827 in France, it may also be the basis of a collection from Massachusetts (B. N. Gates 15713, 8 Nov. 1942, CONN), noted as doubtless an escape and spreading by rooting freely at tips of canes, and in Oklahoma, where a scrambling vine was collected (P. Kirtley 68, 6 Oct. 1935, MO). Such occasional findings of R. sempervirens can be expected in mostly warmer areas of the continent where it is readily recognized by its sprawling stems to 60 dm, and usually persistent, leathery, and lustrous leaflets with terminal leaflets distinctly longer than laterals. The species is introduced sporadically in the West Indies, Central America, and South America.

Rosa ×moschata Herrmann, musk rose, an escape from mostly southern latitude gardens, is found in Alabama, Illinois (not confirmed), and Louisiana. It is identified by long climbing or prostrate stoloniferous stems reaching 90 dm with erect or slightly curved prickles, leaflets ovate to lanceolate-elliptic, 5–50(–70) mm, mostly glabrous, finely serrate, and adaxially not lustrous, flowers to 5 cm diam. in clusters having a musky fragrance, petals white, or less commonly, pink, often double, sepals narrowly lanceolate and long-acuminate to 20 mm, strongly reflexed, dark red or purple-brown hips.

Selected References

None.

Key

1 Leaflets 3–5, terminal: petiolules 10–16 mm, blade teeth (18–)35(–42) per side; stipule margins entire, sometimes fimbriate; flowers 3–5 cm diam.; sepal margins entire. Rosa setigera
1 Leaflets (5–)7–9(–11), terminal: petiolules 5–13 mm, blade teeth 12–20 per side; stipule margins fimbriate; flowers 1.5–2.5 cm diam.; sepal margins pinnatifid > 2
2 Pedicels 5–12 mm, stipitate-glandular or eglandular, usually pubescent; sepals 6–10 × 1.5–2 mm, abaxial surfaces usually stipitate-glandular; flowers 1.5–2.5 cm diam.; petals single or double; leaflet adaxial surfaces dull, terminal blade membranous. Rosa multiflora
2 Pedicels 18–25 mm, eglandular, glabrous; sepals 6–8 × 1–1.5 mm, abaxial surfaces eglandular; flowers 2–2.5 cm diam.; petals usually double; leaflet adaxial surfaces lustrous, terminal blade leathery. Rosa lucieae

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

... more about "Rosa sect. Systylae"
stipitate-glandular +, pubescent +, glabrous +  and tomentose +
lustrous +  and dull +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
de Candolle +
gray +, red +  and brown +
exfoliating +
compound +  and simple +
opposite +  and alternate +
4.8 cm48 mm <br />0.048 m <br /> (7 cm70 mm <br />0.07 m <br />) +
2.7 cm27 mm <br />0.027 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4.8 cm48 mm <br />0.048 m <br />) +
lustrous +  and dull +
smooth +  and rugose +
obovate +, elliptic-ovate +, ovate +  and elliptic +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
? (?) +  and ? (?) +
8mm +  and 27mm +
persistent +
free +  and distinct +
North America +, Europe +, Asia (primarily China) +, n Africa +, in Mexico +, West Indies +, Central America +, South America +, Pacific Islands (New Zealand) +  and Pacific Islands (Philippines) +
not +  and aggregated +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
orange-red +  and red +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
stipitate-glandular +  and glabrous +
subglobose +, ovoid +  and globose +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
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 +
stipitate-glandular +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
leathery +  and fleshy +
(1-)4-30(-50)-flowered +
crassinucellate +
3-foliate +  and compound +
semipersistent +  and deciduous +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
leathery +  and membranous +
petiolulate +  and subsessile +
elliptic +  and obovate more or less oblong obovate-elliptic lanceolate-elliptic or obovate-oblong +
stipitate-glandular +
pinnatifid +  and entire +
distinct +
inferior +  and superior +
clustered +, biseriate +  and superposed +
stipitate-glandular +, pubescent +  and glabrous +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
free +  and distinct +
double +  and single +
0.5 cm5 mm <br />0.005 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
adnate +, free +, connate +  and distinct +
mixed +  and paired +
erect +  and declined +
flattened +
Cat. Pl. Hort. Monsp., +
not arillate +
deciduous +  and persistent +
free +  and distinct +
lanceolate +  and ovate-acuminate +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
rarely densely puberulent +  and tomentose +
free +  and distinct +
branched +  and simple +
vinelike +, climbing +  and procumbent +
1 +  and 20 +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +
free +  and connate +
pilose +  and glabrous +
not elongate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
glandular +  and eglandular +
tomentose +, pubescent +, puberulent +  and glabrous +
Rosa sect. Systylae +
section +
prolonged +
inconspicuous +
enlarged +  and small +