Rosa foliolosa

Nuttall ex Torrey & A. Gray

Fl. N. Amer. 1: 460. 1840.

Common names: White prairie rose
EndemicIllustrated
Synonyms: Rosa ignota Shinners
Treatment appears in FNA Volume 9. Treatment on page 103. Mentioned on page 96, 104.

Shrubs, forming thickets or not. Stems erect to deflexed, 3–6 dm, densely branched; bark dull reddish-brown, sometimes green, glabrous; infrastipular prickles paired, erect, subulate, 2–5 × 0.5–1 mm, base glabrous, internodal prickles or aciculi rare, sometimes absent. Leaves 3–7 cm; stipules 6–14 × 1.5–4 mm, auricles flared, 2–3 mm, margins entire or glandular-serrate, eglandular, surfaces glabrous, rarely puberulent, eglandular; petiole and rachis with pricklets, usually glabrous, stipitate-glandular; leaflets (5–) 9 (–11), terminal: petiolule 1–4 (–6) mm, blade lanceolate to narrowly elliptic, 14–25 × 3–7 mm, membranous, base long-cuneate, margins 1-serrate, gland-tipped or eglandular, teeth 9–15 per side, gland-tipped, apex acute, abaxial surfaces light green, glabrous, eglandular, exserted midveins sometimes with sparse pricklets, pubescent, stipitate-glandular, adaxial deep green, lustrous, glabrous. Inflorescences corymbs, 1 (–5) -flowered. Pedicels erect, slender, 2–8 mm, glabrous, stipitate-glandular; bracts 2, lanceolate, 8–12 × 3–4 mm, margins entire, few stipitate-glandular, surfaces glabrous, eglandular. Flowers 3.5–4.5 cm diam.; hypanthium subglobose, globose, or ovoid, 4–4.5 × 2.5–4 mm, glabrous, usually densely stipitate-glandular, neck absent; sepals reflexed or spreading, lanceolate, 13–20 × 2–3 mm, tip 3 × 0.5 mm, margins pinnatifid, abaxial surfaces glabrous or puberulent, stipitate-glandular; petals single, white, rarely pink, 17–28 × (6–) 10–18 mm; carpels 20–32, styles exsert 1–1.5 mm beyond stylar orifice (1.5–2 mm diam.) of hypanthial disc (3–4 mm diam.). Hips dull red, globose to depressed-globose, rarely urceolate, 9–10 × 7–9 mm, leathery, glabrous, densely stipitate-glandular, neck absent or insignificant; sepals deciduous, spreading to erect. Achenes mostly basal, 8–12, tan, 4 (–5) × 1.5–2 mm. 2n = 14.


Phenology: Flowering May–Jul.
Habitat: Blackland prairies, dry hillsides and woods, roadside and railroad verges, slopes and ravines, limestone and sandstone hills
Elevation: 200–500 m

Discussion

The Kansas distribution of Rosa foliolosa is limited to Cherokee and Neosho counties, bordering Missouri and Oklahoma.

Rosa foliolosa is the only white rose native to North America; a pink form is known from Wise County, Texas (W. H. Lewis 1959). Rosa foliolosa is the most distinctive and geographically limited native Rosa in eastern North America, readily recognized by its white or, rarely, pink, narrow (6–18 mm) petals, lustrous, deep green and narrow (9 mm) leaflets, short pedicels (2–8 mm), leathery, dull red hips, and mostly basal achenes.

Selected References

None.

Lower Taxa

None.

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

... more about "Rosa foliolosa"
stipitate-glandular +, puberulent +, glabrous +  and pubescent +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
4 cm40 mm <br />0.04 m <br /> (?) +
1.5mm +  and 2mm +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
Nuttall ex Torrey & A. Gray +
green +  and reddish-brown +
exfoliating +
compound +  and simple +
opposite +  and alternate +
long-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 />) +
1.4 cm14 mm <br />0.014 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
lustrous +  and dull +
lanceolate +  and narrowly elliptic +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3mm +  and 7mm +
persistent +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
free +  and distinct +
White prairie rose +
1-16(-50)-flowered +
rarely puberulent +  and tomentose +
rarely puberulent +  and tomentose +
Ark. +, Kans. +, Okla. +  and Tex. +
not +  and aggregated +
200–500 m +
3.5 cm35 mm <br />0.035 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
Blackland prairies, dry hillsides and woods, roadside and railroad verges, slopes and ravines, limestone and sandstone hills +
stipitate +  and eglandular +
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 />) +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
stipitate-glandular +  and glabrous +
urceolate +, globose +  and depressed-globose +
leathery +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
conic +  and flat +
setose-glandular +, stipitate +  and eglandular +
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 +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
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 +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1-16(-50)-flowered +
crassinucellate +
3-foliate +  and compound +
11 cm110 mm <br />0.11 m <br /> (17 cm170 mm <br />0.17 m <br />) +
deciduous +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
leathery +  and membranous +
petiolulate +  and subsessile +
elliptic +  and obovate more or less oblong obovate-elliptic lanceolate-elliptic or obovate-oblong +
eglandular +, gland-tipped +  and 1-serrate +
entire +  and glandular-serrate +
stipitate-glandular +
pinnatifid +
distinct +
insignificant +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1-30(-50)-flowered +
setose-glandular +, sessile +, stipitate +  and eglandular +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
stipitate-glandular +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Pink (?) +  and White (?) +
free +  and distinct +
1.7 cm17 mm <br />0.017 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
stipitate-glandular +  and glabrous +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering May–Jul. +
adnate +, free +, connate +  and distinct +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Fl. N. Amer. +
stipitate-glandular +  and glabrous +
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 />) +
deciduous +
free +  and distinct +
spreading +  and erect +
lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
rarely densely puberulent +  and tomentose +
Endemic +  and Illustrated +
free +  and distinct +
flexuous +
procumbent +  and sprawling +
erect +  and deflexed +
1 +  and 20 +
0.6 cm6 mm <br />0.006 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 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 +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
glabrous +  and puberulent +
Rosa ignota +
Rosa foliolosa +
Rosa sect. Rosa +
species +
0.5 cm5 mm <br />0.005 m <br /> (?) +
gland-tipped +
9 +  and 15 +
inconspicuous +
enlarged +  and small +
rhizomatous +  and open +
small +  and miniature +