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Rahmlow, H. J. (ed.) / Wisconsin horticulture
Vol. XXX (September 1939/July-August 1940)

Wisconsin horticulture, vol. 30, no. 10: June, 1940,   pp. [273]-304


Page 302

 
WISCONSIN  HORTICULTURE 
How To Distinguish Between 
* Various Groups Of Roses 
HE following description will  Polyantha Roses 
-  elp LOU titIgt SI UCLweeii 
various groups or types of roses 
now being grown. The most com- 
mon are Hybrid Perpetuals, Hy- 
brid Teas, Floribundas, Polyantha 
roses, Tea roses, and Rugosa 
roses. 
     Hybrid Perpetual Roses 
   A good example is Paul Ney- 
 ron. The name was given these 
 roses because they were more 
 everblooming than other roses at 
 that time. Today, however, the), 
 are not considered everblooming 
 because they bloom  mainly in 
 June with occasional flowers in 
 the fall. They are fairly hardy. 
 but require covering in Wiscon- 
 sin. They are double, and come in 
 colors ranging from pure scarlet, 
 rose, light pink, and white. They 
 are fragrant but not tea-scented. 
          Hybrid Teas 
  A good example is Radiance. 
They are also called M\onthly or 
Everblooming roses, and in fav- 
orable climates bloom almost con- 
tinuously. They are not hardy, 
but can be wintered in \\isconsin 
by careful and heavy mulching. 
The flowers are pointed and well 
formed, often quite double. They 
come in lovely colors often in un- 
usual tints and tones. They are 
strongly tea-scented. The young 
leaves are sometimes bronze. 
They are recommended for all 
parts of the United States 'except 
where it is too cold for them. 
          Tea Roses 
  The Tea Roses are most useful 
in the warmer climates. Their 
fragrance is suggestive of tea. 
They have been crossed with the 
Hybrid Perpetuals to produce the 
hardier, more vigorous Hybrid 
Teas. 
   The Polyantha roses are low 
 growing, semi-dwarf bushes with 
 dense clusters of flowers. There 
 may be in many instances from 
 15 to 50 flowers on a plant, mak- 
 ing a splendid garden display. 
 They are fairly hardy and vigor- 
 ous and well adapted to Wiscon- 
 sin conditions, but must be given 
 some protection in the fall. 
        Floribunda Roses 
   This is a new class especially 
 adapted to mass-planting and 
 garden decoration. They are quite 
 hardy and bloom constantly. They 
 somewhat resemble the Poly- 
 antha, but the individual flowers 
 are large and more perfectly 
 formed. 
            Rugosas 
  The Rugosa, both the species 
and the hybrid, are large strictly 
u1pright bushes and grow quite 
tall, with spiny or thorny stems, 
rough and wrinkled foliage, with 
fragrant although somewhat ir- 
regular flowers. They are adapt- 
ed to rustic use and not so well 
adapted to the sophisticated city 
garden. The Grootendorst seems 
to be a blend of the Rugosa and 
IPolyantha type. They are very 
hardy. 
  NATIONAL SHADE TREE 
        CONFERENCE 
T HE Sixteenth National Shade 
   Tree Conference will be held 
at the Book-Cadillac Hotel, De- 
troit. Michigan, August 27-30. 
Anyone interested in the program 
may write the Conference at 710 
Stephenson Building, D e t r o i t, 
Michigan. 
layer of prairie soils that could 
be detrimental to trees. 
-From Annual Report of the Di- 
rector, Agricultural Experiment 
Station, University of \Visconsii,. 
        Properly Placed 
  Politician (to railroad superin- 
tendent): "Can't you give iiy 
friend a job on your railroad?" 
  Superintendent: "But he can't 
speak English." 
  Politician: "Well, then, give 
him a job calling out trains." 
302 
June, 1940 
   WHY DO TREES FAIL ON 
        PRAIRIE SOIL? 
 S OME clues as to why wind- 
     breaks and other tree plan- 
 tations often fail on southern 
 Wisconsin prairie soil have been 
 uncovered by D. P. White and 
 S. A. Wilde, working with sup- 
 port from the Wisconsin Alumni 
 Research Foundation. 
   Greenhouse trials with a num- 
 ber of prairie soils from this area 
 have shown that none of them 
 are well adapted to forest growth. 
 Seedlings grew but little better 
 on prairie soil than on barren 
 sand. 
      Low in Phosphorus 
  Analyses showed the prairie 
  soils were low in available phos- 
phorus, even though some of 
them had as much as 1,000 lbs. 
per acre of total phosphorus. Ap- 
plying phosphate fertilizer mark- 
edly improved the early growth 
of trees on these soils. Nitrogen 
fertilizer brought about further 
improvement in the growth rate. 
even though the prairie soils are 
high in humus and total nitrogen. 
  Part of the difficulty with tree 
nutrition on prairie soil, White 
and Wilde believe, is due to lack 
of the proper soil microorgan- 
isms, particularly mycorrhiza. 
Lack of certain organic growth 
substances may be another fac- 
tor. 
  So far the investigation has 
not revealed any unusual soil re- 
action, carbonate content, or con- 
centration of salts in the upper 


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