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'Rosa setigera f. inermis E.J. Palmer & Steyerm.' rose References
Book  (1994)  Page(s) 34.  
 
[In Adelaide, South Australia, R. setigera] is usually in flower at Christmas
Magazine  (1993)  Page(s) 74-86, vol. 71, no. 1.  Includes photo(s).
 
Floral development of Rosa setigera
Kemp, et al.
ABSTRACT
The development of the flower of Rosa setigera from initiation to the onset of anthesis is described. Rosa setigera is the only known member of the genus Rosa to exhibit dioecy. Flowers of functionally staminate (male) and functionally carpellate (female) plants appear identical, a condition referred to as cryptic dioecy. Discrete sepals and petals are formed on the floral meristem. As the hypanthium forms, stamens are initiated in alternating whorls on the wall of the hypanthium and continue to develop as the hypanthium extends. Carpel primordia arise individually on the remainder of the floral meristem and show neither adnation to the hypanthial wall nor coalescence to one another as they give rise to the styles and stigmas that are exserted above the hypanthium lip. The only observable fusion in this species appears to be the postgenital fusion of the margins of the carpel primordia to form the enclosed locule. Although historically the hypanthium has been variously interpreted as either axial and (or) appendicular in nature, resulting from congenital fusion of sepals, petals, and stamens, this paper uses a more realistic, testable and functional approach to the development of the hypanthium that is in keeping with current concepts such as process morphology.
Book  (Aug 1990)  Page(s) 57.  
 
scentless, clustered, deep pink flowers... a native North American rose, discovered by the great French botanist and plant explorer André Michaux, who was sent on a plant-collecting expedition to the New World by Louis XVI in 1785... 'Bramble Leaved Rose'... The only climbing rose native to North America... used extensively by John and Samuel Feast in Baltimore, Maryland, to create a series of important ramblers, one of which was 'Baltimore Belle'... 'Bramble Leaved Rose', 'Prairie Rose'
Book  (1988)  Page(s) 22.  
 
Samuel Feast, a nurseryman iof Baltimore [Maryland]... used the native 'Prairie Rose' (then named R. rubifolia and now R. setigera to breed some outstanding climbing roses...
Website/Catalog  (1985)  Page(s) 42.  
 

Rosa setigera..... 4 x 6’.

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. 
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.
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