Magazine  (2019)  Page(s) 51. Vol 41, No. 1.  
 
Margaret Furness.  Tea, Noisette and China Mislabels in Australia.
Poly-Teas and Chinas.
The rose sold as Louis XIV (classified variously as China or Hybrid Perpetual) here and elsewhere is often the HT Nigrette, "The Black Rose of Sangerhausen”.

Newsletter  (May 2016)  Page(s) 31.  
 
‘Nigrette’. Also dubbed “The Black Rose of Sangerhausen” by the press, it was released for the market by Max Krause in 1934. To my eye it is a velvety blackish maroon, rather dull and without shading—though I do grow mine in part shade. It is a short plant, one to two feet high at most, with small flowers perhaps two inches in diameter, best grown in a container and fed generously. It exhales a mild scent. ’Nigrette’ invites fungus; while mine has not entertained mildew, it has hosted rust lavishly.

Magazine  (2003)  Page(s) 14. No. 25.  Includes photo(s).
 
J. H. Nichols. Roses in Germany, 1937. Krause will also be remembered for the “ Nigrette episode.” ‘Nigrette’ is not a rose as the general public conceives a rose, but to Krause it was a “mortgage lifter”. It is an interesting oddity, at times with blackish reflexes. The plant and bloom are small. It was on exhibition at the rosarium of Sangerhausen when a press correspondent heard of it and flashed the news throughout the world, announcing “the black rose of Sangerhausen.” This news item made a sensation, and every nurseryman took advantage of the free publicity.

Back cover caption: Another Krause rose is ‘Nigrette’ which was nicknamed The Black R of Sangerhausen. Photo Charles Quest-Ritson.

Magazine  (2003)  Page(s) 26. No. 26.  
 
Ann Bird. Impressions of Sangerhausen.
I managed to find only one bloom of the so-called black rose Nigrette of 1933, which was disapppointing, but the purchase of a small watercolour of the rose from the Rosarium shop made amends.

Magazine  (2000)  Page(s) 10. No. 19.  
 
Charles Quest-Ritson. A trio of Great German Rose Gardens.
Sangerhausen....The layout is fairly fluid, carrying the visitor around the pool and formal display gardens near the entrance, where the ‘black’ rose Nigrette and the ‘green’ rose Rosa chinensis ‘Viridiflora’ are displayed as curiosities……

Book  (2000)  Page(s) 143.  
 
Nigrette. HT. Good reliable rebloom. / good fragrance. Habit: No 1 – see pix p116. Low, rather twiggy shrubs that may be as broad as they are tall. Krause; Conard-Pyle, 1934. Provenance: [SJHRG]
A small grower, with small flowers, Nigrette has dark velvet crimson flowers that shade to black. Despite its intense coloring and small stature, it is a superb bloomer and a strong plant, and should be included in any short list of the best black-red roses.

Book  (1982)  
 
p218. The ‘black rose’ has always been of sufficient interest to amateurs that from time to time a new “black rose” appears on the market. There is, in fact, no such thing, although in many varieties the dark red color is so dark that, with a bit of imagination, it may seem black, but there are always some reddish overtones. Formerly, the darkest variety was Nigrette, a German introduction of 1934. Unfortunately it is not a very strong grower, the few blooms it produces are small and the variety is only found in specialized collections today.

p379. Nigrette HT. (Krause, 1934). ‘Chateau de Clos Vougeot’ x ‘Lord Castlereagh’. Blackish-brown to blackish-red, nearly completely black with age, medium, semi-double, poor bloomer, some scent; growth low, 40 cm./16 in.; foliage small, bluish-green. ARA1935:96.

Book  (1952)  Page(s) 55.  
 
Dr. A. S. Thomas. Red Roses.
Until we got these two new roses ['Charles Mallerin' and 'Tassin'], 'Night' and Nigrette were the best very dark roses procurable. The latter was usually the darker, but its blooms were smaller.

Book  (1948)  Page(s) 81.  
 
I have mentioned the value of using roses of varying shades of red, and for adding to the qualities of richness none are more valuable than those very dark ones that have an almost black sheen on their petals. The blackest of these roses are sometimes of not very sturdy growth, but I would make up for this defect by growing a large number of bushes so that I might have plenty of their flowers to pick. These darker roses throw into relief the hues and tones of the other reds and make, as it were, the heart of the bunch. Nigrette is one of the newest of these and is, I believe, the darkest of all, it is velvety black with buds of duller black and has flowers of medium size. Night is not quite so dark but of good form and sweet scent. It is apt to burn in strong sun……

Book  (1947)  Page(s) 209.  
 
Nigrette (H.T.) has open double flowers of even deeper crimson when light and weather are suitable, but cannot be said either to be a good rose or to justify its right to the name of the Black Rose. Krause 1934...Moderate growth. Very fragrant...June-September. Hardy.