referring more specifically to the pomological details of this new and distinct variety of flat peach tree , the following has been observed , if not differently specified , during the second fruiting season under the ecological conditions prevailing at the orchards located in elne , in the pyrénées orientales departement , france . all observations have been done on rootstock cultivar . the rootstock was a ‘ franc inra montclar ®’ ( unpatented ) tree . all major color code designations are by reference to the r . h . s . color chart ( fourth edition ) provided by the royal horticultural society of great britain . generally .— considered medium to large as compared to other common commercial flat peach cultivars ripening in the middle season of maturity . the tree size the first year was approximately 280 cm . the tree was pruned during each following dormant season to a height of approximately 250 cm . current season shoots growth could reach 80 cm . so the tree size from the second year ( second and next years ) reached a final height of 330 cm with current season shoots length comprised . spread : approximately 200 cm with a cylindrical shape . the whole orchard was oriented to a central leader organisation , with tree lines spaced of 4 . 0 meters and trees spaced of 1 . 0 meter in a same tree line . as a result , the orchard contains 2500 trees by hectare . productivity : very productive . fruit set is spaced by thinning to develop the remaining fruit into the desired market sized fruit . the number of the fruit set varies with the prevailing climatic conditions , and cultural practices employed during the bloom period , and is therefore not distinctive of the present variety . bearer : very regular . fruit set has been heavy during the years of observation and thinning of 1 fruit on 3 was useful every year during the past 5 years . fruit have an important magnifying potential . hardiness : the present tree was grown and evaluated in france . the variety appears to be hardy under typical central pyrénées orientales departement climatic conditions . experimentations on different sites with winter chilling requirement comprised between 350 and 1200 hours showed a good behavior of the tree in all cases . ascertained temperatures as low as − 12 degrees celsius caused no damages to the tree . the tree was also very resistant to frosty springtime weather . diameter : approximately between 7 . 0 and 8 . 0 cm in diameter when measured at a distance of approximately 30 cm above the soil level . bark texture : considered slightly rough , with folds of papery scarfskin being present . lenticels : numerous lenticels are present . the lenticels range in size from approximately 0 . 5 cm in width , and from 0 . 1 to 0 . 2 cm in height . lenticel colour : the outside of lenticels has a silver - grey color ( varying from rhs grey 201 d to rhs black 202 d ), whereas the inside is considered brown ( rhs greyed orange 166b ). bark colouration : the bark has a silver - grey color a little darker than the lenticels ( varying from rhs grey 201 c to rhs black 202 c ). size : mature branches as well as current season shoots are medium to thick for the variety . diameter : average as compared to other flat peach varieties . the current season shoots have a diameter from 4 . 0 to 12 . 0 millimeters , and branches of trees have a diameter comprised between 22 . 0 and 30 . 0 millimeters . surface texture : average , wood which is several years old has no furrowed appearance . crotch angles : primary branches are considered variable , but the crotch angles are generally around 70 degrees from the horizontal axis . this particular characteristic is not considered distinctive of the variety , however . colour of mature branches : medium grey - brown ( varying from rhs grey brown 199 c to b ). colour .— the color of new shoot tips is considered a light green ( varying from rhs green 143 c to d ) on lower part of new shoot tips , whereas the upper part is colored in reddish brown ( varying from rhs greyed red 182 b to c ), darkening when more exposed to the sun . size : considered large for the species . leaf measurements have been taken from vigorous , upright , current - season growth at approximately mid - shoot . the ratio leaf length / leaf width is around 4 . upper leaf surface .— dark green ( rhs green 137 a ). lower surface .— medium green ( varying from rhs green 137 b to 137 c ). uniformity : leaves are isolated or grouped by 2 or 3 . in this last case , it is found one leaf of normal size with one or two smaller leaves ( size - reduction of 50 % and more ). size .— considered medium to large , between 1 . 5 and 2 . 0 millimeters . number .— generally between 3 and 4 . type .— reniform . colour .— on young leaves , leaf glands color is considered a pale green ( rhs green 145 b ). on older leaves , leaf glands color turns to a dark brown ( varying from rhs grey brown 199 a to 199 b ). generally .— no leaf stipules were observed . but as seen in the characteristic relative to the leaves uniformity , it is possible to find leaves by groups of 2 or 3 , with a normal - size leaf and smaller ones . generally .— observations have been made at the end of blooming , on march 2 , 2008 . generally .— at pre - floral stage of development , the floral buds are conic in form with a round tip . their form is evolving until blooming , with variables dimensions . just before blooming , floral buds are approximately 10 . 0 millimeters wide and approximately 18 . 0 millimeters long . colour .— this characteristic is dependent upon the proximity to bloom . at pre - floral stage of development , the bottom of the flowers buds , formed by sepals , is of purple - brown color ( rhs greyed purple 183 a ); the corolla , formed by petals , is generally of pale pink color ( varying from rhs red purple 65 a to b ). petals color shows an evolution until the end of flowering . the buds are considered hardy under typical central pyrénées orientales departement climatic conditions . hardiness : no winter injury was noted during the last several years of evaluation in the central pyrénées orientales departement , with winter temperatures as low as − 12 degrees celsius in january . the current variety has not been intentionally subjected to drought or heat stress , but the variety showed a very good resistance in orchard to temperatures up to 42 degrees celsius with an average temperature between 28 and 30 degrees celsius during 3 weeks in summer . date of bloom : generally march . the first bloom , observed on feb . 26 , 2002 , was exceptionally early . second and third bloom took place respectively on march 10 , 2003 and mar . 7 , 2004 . blooming time : considered early - season in relative comparison to other commercial nectarine cultivars grown in the pyrénées - orientales departement , france . the date of full bloom is observed on march , more particularly between march 3th and 18th . the date of bloom varies slightly with climatic conditions and cultural practices . duration of bloom : approximately 15 days . this characteristic varies slightly with the prevailing climatic conditions . flower type : the variety is considered to have a showy type flower . flower size : considered large . flower diameter at full bloom is approximately 32 . 0 to about 37 . 0 millimeters . flower bud frequency : generally 2 flower buds appear per node , occasionally 1 . petal colour : medium pink ( rhs red purple 65 b ) when young , darkening with advancing senescence . form .— the claw is considered to have a conic form with a slighty rounded extremity . length .— approximately 5 . 0 to 6 . 0 millimeters . width .— approximately 4 . 0 to 5 . 0 millimeters . generally .— the petal apices are generally entire at the tip , dome - shaped . length .— considered medium - long and having an average length of approximately 3 . 0 to 4 . 0 millimeters . diameter .— considered average , approximately 2 . 0 millimeters . colour .— brown to light brown ( varying from rhs grey brown n199 c to d ). colour .— a greenish yellow ( ranging from rhs yellow group 13 a to b to rhs yellow green 150 a to b ). internal surface texture .— smooth and glabrous . color .— the outer surface of the calyx is considered of purple - brown ( rhs greyed purple 183 a ) color . surface texture .— the outer surface has a short , fine pubescent texture . size .— average . colour .— a purple - brown ( rhs greyed purple 183 a ). generally .— average in length . color .— orange - yellow ( varying from rhs yellow orange 16 a to b ). anthers are becoming brown after maturity ( rhs greyed purple group 178 a ). pollen production : pollen is abundant , and has a yellow color ( varying from rhs yellow orange 17 b to c ). the present variety is considered self fruitful ( self - pollinating ). size .— variable in length , approximately 11 . 0 to 18 . 0 millimeters in length . in all cases filament &# 39 ; s length is superior or equal to pistil &# 39 ; s length . color : considered light pink ( varying from rhs red purple 62 c to d ) to darker pink ( varying from rhs red purple 73 a to b ) with advancing senescence . number .— generally 1 . generally .— average in size . length .— approximately 12 . 0 to 15 . 0 millimeters including the ovary ; smaller or equal to filament &# 39 ; s length . colour .— considered a very pale green ( varying from rhs yellow green 150 d group to rhs yellow green 151 d group ). surface texture .— the variety has a glabrous pistil . date of first picking : aug . 16 , 2002 . the date of harvest varies slightly with the prevailing climatic conditions . date of last picking : aug . 23 , 2002 , only 2 harvests were necessary . typical weight : approximately between 150 . 0 and 200 . 0 grams . this characteristic is high dependent upon the prevailing cultural practices , and therefore is not particularly distinctive of the variety . generally .— flat and rounded . the fruit is generally uniform in symmetry , viewed from pistil end . fruit suture : shallow , extending from the base to the apex . no apparent callousing or stitching exists along the suture line . colour .— this has generally a color similar to the blush fruit color , an orange red ( varying from rhs orange red group 34 a to b ). stem cavity : average depth of the stem cavity is about 0 . 5 to 0 . 6 cm . average width is about 1 . 2 to 1 . 5 cm . thickness .— considered thick and strong , and very tenacious to the flesh to tenacious to the flesh depending on stage of maturity . texture .— slightly pubescent . taste .— semi - sweet . tendency to crack .— generally not observed . blush colour .— this blush colour is generally homogenous and orange red ( varying from rhs orange red group 34 a to b ). the red blush covers between 80 % and 90 % of the fruit skin surface . the percentage of the blush on the fruit skin surface can vary , and is generally dependant upon the prevailing conditions under which the fruit was grown . ground colour .— yellow orange ( rhs yellow orange group 18 d ). fruit stem : medium in length , approximately between 4 . 0 and 5 . 0 millimeters . colour : pale green ( varying from rhs yellow green 145a to 145 b ). ripens .— very evenly , homogenous , long shelf - life of the fruit . texture .— very firm , very dense , juicy at harvest maturity stage . fibers .— generally none observed . aroma .— pronouced . eating quality .— considered very good , aromatic . flavor .— considered semi - sweet . the brix is superior to 13 . 0 degrees . acidity is comprised between 6 and 9 meq / 100ml . the flavor is considered aromatic . the flesh is juicy . juice .— jucy to very juicy at complete maturity . brix .— generally superior to 13 . 0 degrees . this characteristic varies slightly with the number of fruit per tree ; prevailing cultural practices ; and the surrounding climatic conditions , and can be much more higher . flesh colour .— white ( rhs white group n155d ) with a slight red pigmentation under the skin and close to the stone . stone cavity : considered small size , with dimensions corresponding to stone &# 39 ; s dimensions . surface texture .— the pit is transversely furrowed on its entire surface . furrows are more pronounced and more flat toward lateral faces . ridges .— the surface texture is generally characterized by more prominent ridges along the ventral edges and is more prominent at the apical tip . stone colour : the color of the dry stone is generally considered an orange to red brown ( varying from rhs greyed orange 173 c to d ). tendency to split : splitting is absent or very low , depending on climatic conditions between blooming period and stone hardening . size .— the kernel is considered small . length .— about 7 . 0 millimeters . thickness .— about 5 . 0 millimeters . form .— considered flat and and elliptic . pellicle .— pubescent . colour .— the kernel skin is a light yellowish orange ( rhs greyed orange 166 c ). the almond is cream - white ( rhs orange chite 159 d ). the kernel and its embryo are mature at the time of fruit maturity . use : the subject variety ‘ flatprincesse ’ is considered to be a nectarine tree of the medium season of maturity , and which produces fruit that are considered very firm , attractively coloured . fruits are excellent for uncooked consumption , crunchy or at full maturity , and very aromatic . they are useful for both local and very long distance shipping , with a shelf life of few weeks after harvest . keeping quality : good . fruit stayed a little more than one week on tree before harvest and then , has stored well until 2 to 3 weeks after harvest at 2 . 0 degree celsius . they have a slow maturation and a long shelf life both on the tree after growth completion and after harvesting without alteration . shipping quality : considered good . the fruit of the new flat peach variety showed minimal bruising of the flesh or skin damage after being subjected to normal harvesting and packing procedures . resistance to insects and disease : no particular susceptibilities were noted . the present variety has not been shown to be very sensitive to powdery mildew , or conservation diseases and decay due to its thick and strong skin . although the new variety of flat peach tree possesses the described characteristics when grown under the ecological conditions prevailing near the town of elne , france , it should be understood that variations of the usual magnitude and characteristics incident to changes in growing conditions , fertilization , pruning , pest control and horticultural management are to be expected .
a new and distinct variety of flat peach tree , denominated ‘ flatprincesse ’, has a very high regular productivity and has the same good fruit quality as other varieties : ‘ maillarflat ’ ‘ flatpretty ’ ‘ flatqueen ’ ‘ flatnice ’.