Rosa woodsii subsp. woodsii

Synonyms: Rosa adenosepala Wooton & Standley R. demareei E. J. Palmer R. fendleri Crépin R. macounii Greene R. woodsii var. fendleri (Crépin) Rydberg R. woodsii var. terrens (Lunell) Breitung
Treatment appears in FNA Volume 9. Treatment on page 107. Mentioned on page 106.

Shrubs, 2–10 (–20) dm. Stems usually densely branched; prickles usually present on distal stems and branches, infrastipular erect, rarely appressed or curved, terete or subulate, 2–8 mm, internodal dense, sometimes sparse or absent. Terminal leaflets obovate, sometimes ovate or elliptic, 13–30 (–35) mm. Inflorescences 1–3 (+) -flowered. Sepals: abaxial surfaces eglandular, rarely stipitate-glandular (north of 49° parallel). 2n = 14.


Phenology: Flowering Jun–Jul(–Aug).
Habitat: Prairies, plains, riparian and woodland areas
Elevation: 100–2200(–3500) m

Distribution

V9 155-distribution-map.jpg

Alta., B.C., Man., N.W.T., Ont., Sask., Yukon, Alaska, Ariz., Colo., Idaho, Iowa, Kans., Minn., Mont., Nebr., N.Mex., N.Dak., Okla., S.Dak., Tex., Wyo., Mexico (Coahuila)

Discussion

Subspecies woodsii is the only subspecies of Rosa woodsii occurring east of the Rocky Mountains, where it is found from the prairies of northern Canada and central Alaska to the mountains of northern Mexico. The subspecies also extends west in valleys of the Rocky Mountains (for example, barely entering Idaho at Monida Pass), where it intergrades with other subspecies. The subspecies is sometimes introduced in Quebec, Illinois, Missouri, and Wisconsin; such introductions are mostly transient. Pending further study, var. maderensis Henrickson of northern Mexico is tentatively included in this subspecies. Within this large geographic range, significant variation occurs in glandularity and other features (V. L. Harms 1974; W. H. Lewis and B. Ertter 2010); usually plants are relatively compact, with abundant erect prickles, obovate leaflets, and relatively few flowers.

In central Canada, particularly in Alberta, western Manitoba, and Saskatchewan, populations of subsp. woodsii often express gigas (enlarged) features of leaves, stem heights, floral diameters, and petals at extreme morphologic ranges of the subspecies. A tetraploid (2n = 28) having these characteristics (W. H. Lewis, unpubl.) has been found in populations near Edmonton, Alberta; such diversity may be due, at least in part, to autopolyploidy or, alternately, hybridization with R. acicularis subsp. sayi (2n = 42), as B. Ziola and J. R. Dugle (1970) concluded in Manitoba and V. L. Harms (1974) in Saskatchewan. Rosa acicularis usually completes flowering about ten days before R. woodsii, although in some years overlaps occur.

Selected References

None.

Lower Taxa

None.

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

stipitate-glandular +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
tan +  and dark tan +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
basiparietal +  and basal +
2mm +  and 4mm +
glabrous +  and glaucous +
pubescent +  and glabrous +
lustrous +  and dull +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
Lindley +
exfoliating +
compound +  and simple +
opposite +  and alternate +
obtuse +  and cuneate +
3.5 cm35 mm <br />0.035 m <br /> (4 cm40 mm <br />0.04 m <br />) +
2 cm20 mm <br />0.02 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
lustrous +  and dull +
cordate +, ovate +, elliptic +  and obovate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
widest +, 6mm +  and 20mm +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
persistent +
0.9 cm9 mm <br />0.009 m <br /> (2 cm20 mm <br />0.02 m <br />) +
lanceolate +  and ovate +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
free +  and distinct +
1-16(-50)-flowered +
rarely puberulent +  and tomentose +
rarely puberulent +  and tomentose +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Sask. +, Yukon +, Alaska +, Ariz. +, Colo. +, Idaho +, Iowa +, Kans. +, Minn. +, Mont. +, Nebr. +, N.Mex. +, N.Dak. +, Okla. +, S.Dak. +, Tex. +, Wyo. +  and Mexico (Coahuila) +
not +  and aggregated +
100–2200(–3500) m +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
Prairies, plains, riparian and woodland areas +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
puberulent-velutinous +
0.1 cm1 mm <br />0.001 m <br /> (?) +
1.3 cm13 mm <br />0.013 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
purplish red +, orange-red +  and red +
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
urceolate +, oblong +, ovoid +, depressed-globose +  and globose +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 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 +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
stipitate-glandular +  and glabrous +
Globose (?) +, Oblong (?) +  and Ovoid (?) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
leathery +  and fleshy +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
crassinucellate +
usually sparse +  and dense +
3-foliate +  and compound +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
deciduous +
2.5 cm25 mm <br />0.025 m <br /> (8 cm80 mm <br />0.08 m <br />) +
leathery +  and membranous +
petiolulate +  and subsessile +
elliptic +  and obovate more or less oblong obovate-elliptic lanceolate-elliptic or obovate-oblong +
eglandular +, ciliate +  and entire +
entire +, 1(-2+)-serrate +  and serrate +
undulate +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
distinct +
1mm +  and 2mm +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1-30(-50)-flowered +
2 cm20 mm <br />0.02 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
stipitate-glandular +  and glabrous +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 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 />) +
free +  and distinct +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
stipitate-glandular +  and glabrate +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering Jun–Jul(–Aug). +
adnate +, free +, connate +  and distinct +
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
subulate +  and terete +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Ros. Monogr., +
stipitate-glandular +  and glabrate +
0.5 cm5 mm <br />0.005 m <br /> (?) +
not arillate +
1.5 cm15 mm <br />0.015 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
persistent +
free +  and distinct +
erect +  and spreading +
ovatelanceolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
rarely densely puberulent +  and tomentose +
Illustrated +
free +  and distinct +
flexuous +
procumbent +  and sprawling +
1 +  and 20 +
slender +  and stout +
1.6 cm16 mm <br />0.016 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 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 /> (0.2 cm2 mm <br />0.002 m <br />) +
pubescent +  and glabrous +
Rosa adenosepala +, R. demareei +, R. fendleri +, R. macounii +, R. woodsii var. fendleri +  and R. woodsii var. terrens +
Rosa woodsii subsp. woodsii +
Rosa woodsii +
subspecies +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
elliptic +, ovate +  and obovate +
1.3 cm13 mm <br />0.013 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
4mm +  and 6mm +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
7 +  and 14 +
inconspicuous +
enlarged +  and small +
rhizomatous +  and open +
small +  and miniature +