Rosa subg. Hesperhodos

(Cockerell) Cockerell ex Rehder

Man. Cult. Trees ed. 2, 451. 1940.

Basionym: Undefined subg. Hesperhodos Cockerell Nature 90: 571. 1913
Treatment appears in FNA Volume 9. Treatment on page 78. Mentioned on page 77, 79.

Leaves 1.5–3 cm; leaflets 3–7, margins deeply incised or broadly crenate, sometimes serrate, terminal: petiolule 0.5–4 mm, blade oval, suborbiculate, obovate, or deltate, base cuneate. Inflorescences 1 (–3) -flowered. Pedicels: bracts present or absent. Flowers: hypanthium subglobose to globose or cupulate, densely pubescent or glabrous, setose or not, glandular or eglandular; carpels 10–110 (average 65), styles free, pilose, stylar orifice 2–5 mm diam., rims 0.5–1 mm wide, hypanthial disc absent. Hips leathery, setose.

Distribution

sw, sc United States, nw Mexico

Discussion

Species 2 (2 in the flora).

A phylogenetic analysis using plastid DNA sequences suggests that subg. Hesperhodos is sister to the rest of Rosa, but with weak support (A. Bruneau et al. 2007). This contrasts with analyses indicating that R. persica Michaux of subg. Hulthemia (Dumortier) Focke is sister to the remainder of the genus (S. Wu et al. 2001; V. Wissemann and C. M. Ritz 2005). A more compelling resolution might be possible once the related and more variable R. stellata is examined phylogenetically.

Selected References

None.

"broad" is not a number.

... more about "Rosa subg. Hesperhodos"
Walter H. Lewis +, Barbara Ertter +  and Anne Bruneau +
(Cockerell) Cockerell ex Rehder +
gray +, red +  and brown +
exfoliating +
compound +  and simple +
opposite +  and alternate +
cuneate +
Undefined subg. Hesperhodos +
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 ? (?) +
free +  and distinct +
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 />) +
not +  and aggregated +
eglandular +  and glandular +
urceolate +, pyriform +, oblong +, ellipsoid +, ovoid-obovoid +  and globose +
leathery +
eglandular +  and glandular +
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 +, setose +, glabrous +  and pubescent +
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 +
semipersistent +, persistent +  and deciduous +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
petiolulate +  and subsessile +
elliptic +  and obovate more or less oblong obovate-elliptic lanceolate-elliptic or obovate-oblong +
crenate +  and incised +
distinct +
inferior +  and superior +
clustered +, biseriate +  and superposed +
White (?) +, Pink (?) +  and Red (?) +
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 +
Man. Cult. Trees ed. +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
not arillate +
deciduous +  and persistent +
free +  and distinct +
erect +  and spreading-erect +
deltate +, ovate-acuminate +, lanceolate +  and ovatelanceolate +
rarely densely puberulent +  and tomentose +
free +  and distinct +
branched +  and simple +
procumbent +  and climbing +
arching +, erect +  and spreading +
1 +  and 20 +
caducous +  and persistent +
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 subg. Hesperhodos +
subgenus +
prolonged +
inconspicuous +
enlarged +  and small +
stoloniferous +  and rhizomatous +
subshrub +  and shrub +