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"Some Naming Problems in Rosa"
(Sep 1959)  Page(s) 208.  
 
Refers to 'Agnes' as a triploid hybrid.
(Sep 1959)  Page(s) 206-207.  
 
Rosa damascena Mill. var. semperflorens Rowley comb. nov. This interesting Autumn Damask rose was re-introduced to cultivation by Graham S. Thomas within the past few years. It appeared spontaneously as a sport on a plant of the Perpetual White Moss Rose (Rosier des Quatre Saisons Blanc Mousseau) from which it differs in having rich pink instead of white flowers and a complete absence of moss on sepals, receptacle and pedicels. Both are pure Damask roses and both flower sporadically in the autumn as well as in early summer...The sporting takes place not infrequently and is illustrated on a colour plate showing both types of flowers on a single shoot in Carrière. Here we are told that "This variety (i.e. the Perpetual White Moss) is the result of an accident which apparently occurred for the first time at Thionville around 1835".
(Sep 1959)  Page(s) 208.  
 
Rosa hemisphaerica Herrm. var. Rapini (Boissier et Balansa) Rowley Examination of living material and numerous herbarium specimens at Kew convinces me that R. rapini Boissier et Balsana is the single-flowered wild species from which the full-flowered Sulphur Rose sported some time during or before the seventeenth century. By all that is logical this name should stand with hemisphaerica subordinated as a garden variety of it. However, as the epithet hemisphaerica was published earlier (1762) we have no option but to make the species a variety of the garden rose. This topsy-turvy situation, which recurs for Rosa chinensis Jacq., R. Roxburghii Sweet and R. xanthina Lindl. makes a laughing stock of our botanical nomenclature.
(Sep 1959)  Page(s) 210.  
 
Rosa sericea Lind. and R. omeiensis Rolfe Hurst's hybridisations and living material now in the National Rose Species Collection at Bayfordbury suggest that these two are best united as a single species under the older name R. sericea LINDL. Parallel variations, like the pteracantha prickle form, occur in both, and all combinations of leaflet number, dentition, pedicel form and so forth. A key follows to the better subdivisions:
Fruit red:
--Plant unarmed . . . . . . . . . . . . . . . . . . . . . . . . . . . var. denudata.
--Plant with prickles and bristles:
----Leaflets numerous, up to 17 . . . . . . . . . . . . . . . var. polyphylla.
----Leaflets rarely more than 11 :
--------Pedicels slender, green . . . . . . . . . . . . . . . . var. sericea.
--------Pedicels fleshy, red . . . . . . . . . . . . . . . . . . . var. omeiensis.
--Plant with prickles, bristles and dense glands . . . var. Hookeri.
--Plant with long-decurrent winglike prickles . . . . . var. pteracantha.
Fruit yellow: . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . var. chrysocarpa
(Sep 1959)  Page(s) 210.  
 
Rosa sericea Lind. and R. omeiensis Rolfe Hurst's hybridisations and living material now in the National
Rose Species Collection at Bayfordbury suggest that these two are best united as a single species under the older name R. sericea LINDL. Parallel variations, like the pteracantha prickle form, occur in both, and all combinations of leaflet number, dentition, pedicel form and so forth. A key follows to the better subdivisions:
Fruit red:
--Plant unarmed . . . . . . . . . . . . . . . . . . . . . . . . . . . var. denudata.
--Plant with prickles and bristles:
----Leaflets numerous, up to 17 . . . . . . . . . . . . . . . var. polyphylla.
----Leaflets rarely more than 11 :
--------Pedicels slender, green . . . . . . . . . . . . . . . . var. sericea.
--------Pedicels fleshy, red . . . . . . . . . . . . . . . . . . . var. omeiensis.
--Plant with prickles, bristles and dense glands . . . var. Hookeri.
--Plant with long-decurrent winglike prickles . . . . . var. pteracantha.
Fruit yellow: . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . var. chrysocarpa
(Sep 1959)  Page(s) 210.  
 
7. Rosa sericea Lindl. and R. omeiensis Rolfe Hurst's hybridizations and living material now in the National Rose Species Collection...suggest that these two are best united as a single species under the older name R. sericea Lindl. Parallel variations, like the pteracantha prickle form, occur in both, and all combinations of leaflet number, dentition, pedicel form and so forth. A key follows to the better subdivision:
Fruit Red:
Plant unarmed........var. denudata
(Sep 1959)  Page(s) 210.  
 
Rosa sericea Lind. and R. omeiensis Rolfe Hurst's hybridisations and living material now in the National Rose Species Collection at Bayfordbury suggest that these two are best united as a single species under the older name R. sericea LINDL. Parallel variations, like the pteracantha prickle form, occur in both, and all combinations of leaflet number, dentition, pedicel form and so forth. A key follows to the better subdivisions:
Fruit red:
--Plant unarmed . . . . . . . . . . . . . . . . . . . . . . . . . . . var. denudata.
--Plant with prickles and bristles:
----Leaflets numerous, up to 17 . . . . . . . . . . . . . . . var. polyphylla.
----Leaflets rarely more than 11 :
--------Pedicels slender, green . . . . . . . . . . . . . . . . var. sericea.
--------Pedicels fleshy, red . . . . . . . . . . . . . . . . . . . var. omeiensis.
--Plant with prickles, bristles and dense glands . . . var. Hookeri.
--Plant with long-decurrent winglike prickles . . . . . var. pteracantha.
Fruit yellow: . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . var. chrysocarpa
(Sep 1959)  Page(s) 210.  
 
Rosa sericea Lind. and R. omeiensis Rolfe Hurst's hybridisations and living material now in the National
Rose Species Collection at Bayfordbury suggest that these two are best united as a single species under the older name R. sericea LINDL. Parallel variations, like the pteracantha prickle form, occur in both, and all combinations of leaflet number, dentition, pedicel form and so forth. A key follows to the better subdivisions:
Fruit red:
--Plant unarmed . . . . . . . . . . . . . . . . . . . . . . . . . . . var. denudata.
--Plant with prickles and bristles:
----Leaflets numerous, up to 17 . . . . . . . . . . . . . . . var. polyphylla.
----Leaflets rarely more than 11 :
--------Pedicels slender, green . . . . . . . . . . . . . . . . var. sericea.
--------Pedicels fleshy, red . . . . . . . . . . . . . . . . . . . var. omeiensis.
--Plant with prickles, bristles and dense glands . . . var. Hookeri.
--Plant with long-decurrent winglike prickles . . . . . var. pteracantha.
Fruit yellow: . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . var. chrysocarpa
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