Rosa sect. Minutifoliae

Crépin

J. Roy. Hort. Soc. 11: 226. 1889.

Treatment appears in FNA Volume 9. Treatment on page 79. Mentioned on page 77.

Shrubs, forming dense thickets, xerophytic; rhizomatous. Stems erect, rarely arching, 2.5–12 (–15) dm; distal branches densely pubescent or glabrous, with or without stellate hairs; prickles erect, rarely curved, infrastipular prickles present, mixed with internodal prickles and aciculi. Leaves deciduous, 1.5–3 × 1.5–2.5 cm; stipule margins entire or dentate, glandular or eglandular, auricles flared; leaflets 3–7, terminal: petiolule 0.5–4 mm, blade oval, suborbiculate, obovate, or deltate, 6–18 × 4–13 mm, abaxial surfaces usually pubescent or tomentulose, rarely glabrous. Inflorescences 1 (–3) -flowered. Pedicels erect, stout, 2–16 mm, mostly setose, often pubescent, rarely glabrous; bracts 0 or 1 or 2, margins serrate to deeply incised. Flowers 2.5–5 cm; hypanthium thick-walled, setose or not; sepals ovatelanceolate, 8–20 × (1–) 2–5 mm, margins pinnatifid, abaxial surfaces glabrous or pubescent, sessile or stipitate-glandular, sometimes eglandular; petals single, pink to rose-pink, sometimes white; carpels 10–110, styles free, stylar orifice 2–5 mm diam., rims 0.5–1 mm wide, hypanthial disc absent. Hips dull red to dark reddish purple, subglobose or cupulate, 5–13 (–18) × 5–16 (–18) mm, hard, leathery, pubescent or glabrous, setose, stipitate-glandular or eglandular; sepals persistent, erect. Achenes basal.

Distribution

sw, sc United States, nw Mexico

Discussion

Species 2 (2 in the flora).

Selected References

None.

Key

1 Leaflets 5–7, terminal blades 3–7 × 2–6 mm; bracts 1 or 2; flowers 2.5–3(–4) cm diam.; hypanthia subglobose to globose, densely pubescent and setose; distal branches pubescent or glabrous, without stellate hairs; sepals 8–12 × 2–4 mm, abaxial surfaces pubescent; hips eglandular, densely setose. Rosa minutifolia
1 Leaflets 3–5, terminal blades 8–18 × 5–13 mm; bracts 0; flowers 4–5 cm diam.; hypanthia cupulate, puberulent or glabrous; distal branches densely pubescent, with or without stellate hairs; sepals 12–20 × 4–5 mm, abaxial surfaces glabrous, sometimes puberulent; hips stipitate-glandular, densely or sparsely setose. Rosa stellata

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

... more about "Rosa sect. Minutifoliae"
eglandular +  and sessile +
stipitate-glandular +, pubescent +, glabrous +  and tomentulose +
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
Crépin +
gray +, red +  and brown +
exfoliating +
compound +  and simple +
opposite +  and alternate +
cuneate +
Undefined subg. Hesperhodos +
0.6 cm6 mm <br />0.006 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
lustrous +  and dull +
smooth +  and rugose +
deltate +, obovate +, suborbiculate +  and oval +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
? (?) +  and ? (?) +
4mm +  and 13mm +
free +  and distinct +
glabrous +  and pubescent +
sw +, sc United States +  and nw Mexico +
not +  and aggregated +
1 cm10 mm <br />0.01 m <br /> (9 cm90 mm <br />0.09 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
1.3 cm13 mm <br />0.013 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
1.6 cm16 mm <br />0.016 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
red +  and dark reddish +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
stipitate-glandular +, setose +, glabrous +  and pubescent +
cupulate +  and subglobose +
leathery +  and hard +
0.5 cm5 mm <br />0.005 m <br /> (1.6 cm16 mm <br />0.016 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 +
not +  and setose +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
leathery +  and fleshy +
crassinucellate +
3-foliate +  and compound +
deciduous +
1.5cm +  and 3cm +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
petiolulate +  and subsessile +
elliptic +  and obovate more or less oblong obovate-elliptic lanceolate-elliptic or obovate-oblong +
pinnatifid +, serrate +  and deeply incised +
distinct +
inferior +  and superior +
clustered +, biseriate +  and superposed +
glabrous +, pubescent +  and setose +
0.2 cm2 mm <br />0.002 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
White (?) +, Pink (?) +  and Rose-pink (?) +
free +  and distinct +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
adnate +, free +, connate +  and distinct +
J. Roy. Hort. Soc. +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
not arillate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +
free +  and distinct +
ovatelanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
rarely densely puberulent +  and tomentose +
free +  and distinct +
branched +  and simple +
procumbent +  and climbing +
arching +  and erect +
1 +  and 20 +
caducous +  and persistent +
eglandular +, glandular +  and dentate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
persistent +
not elongate +
glandular +  and eglandular +
tomentose +, pubescent +, puberulent +  and glabrous +
Rosa sect. Minutifoliae +
Rosa subg. Hesperhodos +
section +
prolonged +
inconspicuous +
enlarged +  and small +