Book  (2019)  
 
Rosa bracteata J. C. Wendland, Bot. Beob. 50. 1798.
shuo bao qiang weiRosa macartnea Dumont de Courset; R. sinica Linnaeus var. braamiana Regel.
Shrubs evergreen, diffuse, 0.5–3 m tall, with long repent branches. Branchlets purple-brown, terete, robust, tomentose; prickles often in pairs below stipules, straight to slightly curved, to 9 mm, flat, smaller prickles and glandular bristles often present and dense to scattered. Leaves including petiole 4–9 cm; stipules mostly free, or with base adnate to petiole, densely pubescent, margin pectinate, densely glandular-pubescent; rachis and petiole sparsely pubescent, glandular-pubescent and shortly prickly; leaflets 5–9, elliptic or obovate, 1–2.5 × 0.5–1.5 cm, leathery, abaxially glabrous or pubescent along veins, adaxially glabrous, shiny, base broadly cuneate or subrounded, margin crenate, apex truncate, rounded-obtuse, or slightly acute. Flowers solitary or 2 or 3 and fasciculate, 4.5–9 cm in diam.; pedicel less than 1 cm, densely villous, sparsely glandular-pubescent; bracts several, large, broadly ovate, abaxially densely tomentose, adaxially subglabrous, margin irregularly incised serrate, laciniate, or pectinate. Hypanthium depressed-globose, abaxially densely tawny pubescent and glandular-pubescent. Sepals 5, broadly ovate, abaxially densely tawny pubescent, adaxially sparsely pubescent, apex caudate-acuminate. Petals 5, white or yellowish white, obovate, base broadly cuneate, apex emarginate. Styles free, slightly exserted, slightly shorter than stamens, densely pubescent. Hip globose, 1.3–2.7 cm in diam., densely tawny pubescent, with persistent, reflexed sepals. Fl. May–Jul, fr. Aug–Nov.
Mixed forests, scrub, sandy hills, stream sides, seashores, roadsides; sea level to 300 m. Fujian, Guizhou, Hunan, Jiangsu, Jiangxi, Taiwan, Yunnan, Zhejiang [S Japan].

Book  (2018)  Page(s) 20.  
 
 ...R. bracteata, [a] une odeur florale de punaise...

Article (newsletter)  (Jul 2012)  Page(s) 45.  
 
R. bracteata (Fig.1. o. sour-sweet scent reminding us of that of Japanese plum blossoms) ....
.... benzyl acetate (54.9%) and benzyl alcohol (10.4%) in R. bracteata ....
We classed R. sambucina and R. bracteata under the Unique group since their fragrances were found to contain some components rarely found in other roses, though they may be found in the flowers of other plants. The main component of the fragrance of R. sambucina was phenylacetaldehyde (49.6%), while that of R. bracteata was benzyl acetate (54.9%). ....
Benzyl acetate, the main component of R. bracteata’s fragrance, is generated from benzyl alcohol (Fig.3) ^{12, 13)}, contained in the fragrances of R. rugosa and R. multiflora var. adenochaeta. While the fragrances of some other roses have been found to contain a small amount of benzyl acetate14), it was not a main component in any of them.

Article (magazine)  (2009)  Page(s) 30.  
 
R. bracteata Wendl.  Source TAMU [Collection of Texas A. M. University] Chromosome Number 14

Website/Catalog  (2006)  
 
Kakayan-Bara (Cagayan Rose)
syn. = Yaeyama-No-Ibara (Field Briar from Yaeyama Islands)
R. bracteata J. C. Wendl.
Bot. Beob.: 50 (1798)
Distribution: Yaeyama Islands
This rose is found only in some of the Yaeyama Islands, which are located in the southern points of Japan, but also is distributed in lowlands of Taiwan and southern areas of China. The author saw it growing wild in grassland on Ishigaki Island.
In 1828, a drifting ship reached the coast of Cagayan, northern part of Luzon Island, Philippine. When the sailors came back to Japan two years later, the captain brought seeds of R. bracteata to Daisuke Baba, a samurai and a famous plant collector. It was the first record of this rose in Japan, and so it came to be called Kakayan-Bara.
It gives pretty large white flowers 5 to 7 cm across. Notched bracts just below the calyx tube are the distinctive feature of this rose. A famous descendant of this rose, ‘Mermaid’ (W. Paul, 1918) has bracts of the same shape, too. The author heard that R. bracteata comes in bloom in May in its natural habitats, but the one she planted in Chiba (near Tokyo) gives flowers sporadically from May to November.
This rose displays many charms: for example, eye-catching golden stamens, evergreen shiny foliage, and growth like climbing roses, but unfortunately, it has no tolerance to cold weather.

Book  (2006)  Page(s) 120-121.  Includes photo(s).
 
Kakayan-Bara (Cagayan Rose)
syn. = Yaeyama-No-Ibara (Field Briar from Yaeyama Islands)
R. bracteata J. C. Wendl.
Same text as on website

Article (misc)  (2005)  Page(s) 110, Table 5.1.  
 
R. bracteata : diploid

Book  (2002)  Page(s) 84.  
 
R. bracteata Species, white, 1793. Rated 7.3

Article (magazine)  (2001)  Page(s) 393.  
 
R. bracteata Wendl. Ploidy 2x
Pollen fertility 75.7%
Selfed Fruit set 0%

Book  (2000)  Page(s) 48-49.  Includes photo(s).
 
Rosa bracteata/’Chickasaw Rose’/’Macartney Rose’ - description