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'R. setigera inermis' rose References
Website/Catalog  (1982)  Page(s) 35.  
 
Rosa setigera (Prairie rose) A most useful rose for trailing over low walls and for ground-cover purposes. The rose-pink flowers are large in proportion to its spindly growth and small leaves; 2” diameter. The fruits are small but produced in quantity. 1810. F. W. G. (S) 3 x 10’.
Book  (1982)  Page(s) 99.  
 
Rosa setigera The Prairie Rose.  A native of the U.S.A. Where its habitat stretches from the Atlantic to the Rocky Mountains, which means that it inhabits virtually every state in the East and Middle West; it blooms in June-July.  
1803 Was named by Michaux.
1810 First grown in Europe.  Was used for breeding.  Shepherd (1954, p. 43) made the important observation that it could segregate into male and female forms and that the plants bearing fertile seeds often had sterile pollen while in poor seed bearers, the pollen was very fertile.  In its natural habitat it is common to find large bushes which completely lack hips mext to other plants which are covered with them. 
Magazine  (1981)  Page(s) 1.Vol 3, No. 4.  
 
Editor:  .....after a season of old roses such as I have never had before.  A few are still in full bloom as I write. 
Others which have impressed were R. setigera - the Prairie Rose with light green, round, deeply veined foliage and cheery pink flowers with a prominent white eye.
Book  (1981)  Page(s) 284.  Includes photo(s).
 
R. setigera Michx. Prairie Rose. Shrub 1-2 m./3.3-6.6 ft. high, climbing, stems bald, with strong, slightly curbed prickles; leaflets mostly 3 (-5), ovate-oblong, 3-9 cm./1.2-3.6 in. long, serrate, bright green above, greyish green and hairy on the veins beneath; flowers few, dark pink, 5-6 cm./2-2.4 in. across, in loose corymbs; petioles glandular, pedicels mostly bald, June-August; fruits small, globose, glandular-hispid, brownish-green. 2n = 14. WR 23; BC 3438; BB 1965; VP 442. (= R. trifoliata Donn). N. America, from the Atlantic coast to the Rocky Mts. 1810.
Widely used for breeding hardy climbing roses, especially 100 years ago. Shepherd draws attention to the fact taht this rose is "functionally dioecious", i.e. that seedbearing plants are often sterile, while non-fruiting palnts may be fertile. In natural colonies of Prairie Roses one clump may be completely devoid of hips, while all the other plants in another group will have many of them (Shepherd, p. 44). The old hybrids, which were bred between 1840-1850, are rarely seen today. Hybrids of our times are --> 'Doubloons' and 'Long John Silver'.
Book  (1976)  Page(s) 136.  
 
R. setigera Michx.
- Fl. Bor. Am., I (1803), 295
(R. trifoliata Rafinsque, R. fenestrata Tratt.)
Büsche: 1 bis 2 m hoch, Triebe kletternd, mit vielen grossen gebogenen Stacheln.
Blätter: 3, seltenr 5 Blättchen; Blättchen länglich-eiförmig, 3 bis 9 cm lang, gesägt, Oberseite hellgrün, Unterseite blaugrün-grün und entlang den Adern filzig; Stiele drüsig.
Blüten: 5 bis 6 cm breit, dunkelrose, in lockeren Dolden; Blütenstiele häufiger kahl. Blütezeit Juni bis August.
Früchte: klein, rund, drüsig-borstig, bräunlich-grün.
Verbreitungsgebiet: Nordamerika (von Ontario bis Nebraska, Texas und Florida).
Zierstrauch, häufig zur Hybridisation mit anderen Rosen genutzt.
Es werden eine Reihe Formen und Sorten dieser Rose kultiviert....
Book  (1976)  Page(s) 118.  
 
R. setigera...f. inermis Palm. et Steyerm. - without prickles, foliage glabrous.
Website/Catalog  (1948)  Page(s) 50.  
 
Rosa
setigera. 6 ft. (Prairie Rose) sandy to silty clay loam, moist, pH 6.0-7.0, sun- partial shade.
Book  (1940)  Page(s) 445-446.  
 
R. setigera Michx. Prairie R. Shrub with glabrous climbing or recurving stems to 5 m. long: lfts. 3, rarely 5, ovate to oblong-ovate, 3-9 cm. long, short-acuminate, serrate, pubescent on veins beneath: fls. about 5 cm. across, rose, fading to whitish, nearly scentless, in rather few-fld. corymbs; pedicels and receptacle glandular-hispid; styles glabrous: fr. globose, about 8 mm. across. Fl. VI-VIII. W.R.71,t(c). Mn.8:t.5(c). G.F.10:323. Gng.1:325. C.L.A.4:339,7:473. S.L.320(h). Ont. to Neb., Tex. and Fla. Intr. 1810. Zone IV.
Book  (1940)  Page(s) 446.  
 
R. setigera...R. s. inermis Palm. & Steyerm., f. Stems unarmed or with few weak spines: lvs. glabrous. Intr. 1923.
Article (magazine)  (1938)  Page(s) 79.  
 
The more southern diploid American species such as R. palustris, R. foliolosa and R. setigera Michx. need a longer growing period before they flower, and for fruit ripening, than could be obtained far to the north.
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