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'Rosa X ecae Hort.' rose References
Book  (Nov 1998)  Page(s) 12.  
R. ecae Native to Afghanistan. Flowers: look like buttercups... "tender"...[questionable characterization, since it grew and flowered outside Boston in the Arnold Arboretum and was found growing at 6000-7000 foot altitude in Afghanistan.]
Book  (1997)  Page(s) 119.  Includes photo(s).
R. ecae Afghanistan 1880. A small, very prickly shrub with reddish-brown twigs and small, fern-like leaves. Numerous buttercup-size flowers of deep, rich yellow with pronounced stamens...
Article (magazine)  (1988)  Page(s) 24-25.  
...The highest Yellow values are found in R. ecae and R. foetida. Their almost spectrally pure Yellow is not yet attained by any hybrid...

[Colour description according to the CIELAB colour space (petal inside): L* = Lightness, a* = red-green axis, b* = yellow-blue axis]
Rosa ecae (light yellow), L* 84, a* -5 to -4, b* 101-102
Article (magazine)  (1988)  Page(s) 63.  
Very similar [to that of R. foetida] are our findings for .....R. ecae (155 mg% carotenoids, 91% epoxydes with also a lot of Violaxanthine).
Book  (1988)  Page(s) 16.  Includes photo(s).
Rosa ecae Aitch. (R. xanthina var. ecae (Aitch.) Boul.) A much-branched, suckering shrub growing to 1.5 m in the wild and 2.5 m in cultivation, with straight, flattened thorns. Branches often crooked, very thorny. Leaflets 7-9, up to 5 mm long, obovate or oblanceolate to broadly elliptic, glandular. Stipules very narrow with diverging auricles. Petals often not overlapping; flowers 20-30 mm across. Hips 5-7 mm long, red brown, sepals patent. ...Introduced in cultivation by Surgeon-Major Aitchison in 1880..
Book  (1981)  Page(s) 253.  
R. ecae Aitchis. Shrub, up to 1 m./3.3 ft high, densely branched, branches very prickly; leaflets 5-9, mostly obovate, only 4-8 mm./0.16-0.31 in. long, serrate, glandular beneath; flowers solitary, intensely yellow, 2 cm./o.8 in. across, May-June; with short, brown pedicels; fruits globose, pea-sized, red, glistening, with persisting, reflexed sepals. 2n=14. Afghanistan, Turkestan, 1880. Introduced by Dr. Aitchison, who combined the name "ecae" from the initials of his wife, E.C.A.
[in the description of Rosa primula]
Always confused with R. ecae, but well distinguished by its paler flowers and red-brown fruits.
Book  (1981)  Page(s) 86-87.  
R. ecae Aitch. syn. R. xanthina Hook. in Bot. Mag., not Lindl.; R. xanthina var. ecae (Aitch.) Boulenger
..About 4 ft high in the wild...taller and laxer in cultivation; prickles crowded, up to ½ in. long, broad at the base, bristles none. Leaves 1 in. or less, [leaflets[ usually seven, sometimes five or nine, which are oval or almost round, ¼ in or so long, glandular beneath...Flowers solitary, about 1 in. across, rich buttercup yellow...Fruit globose about ⅜ in. wide, crowned by deflexed, persistent sepals.
Native to N.E. Afghanistan, N.W. Pakistan, and bordering part of Russia; introduced to Britain by Dr. Aitchison, who found it during the survey of the Kurram valley .... The name is an adaptation of Mrs. Aitchison's initials -- 'E.C.A.' It is closely allied to R. xanthina.
Book  (1980)  Page(s) 114.  
Charles A. Walker Jr. The ECA Mystery Solved.
.....It has been nearly a century since Rosa ecae was given its puzzling acronym of latinized initials. We still don't know a great deal about the rose or that Scottish lady, Eleanor Carmichael Craig Aitchison; but at least E.C.A. is no longer a mystery.
Book  (1975)  Page(s) 25.  
R. ecae....comes from Afganistan and was brought to the UK in 1880 by Dr J.E.T. Aitchison who served as an army surgeon in the Afghan war of that time. He names it after his wife's initials E.C.A., and has made rose writers made very since by not revealing what the 'E.C.' stands for. Until 1940 it was sold in America as R. primula. Personally, I think its interest lies from Golden Chersonese, first available in 1970 and produced by E.F. Allen - an outstanding scientific expert on, and an amateur grower of roses - in conjunction with Canary Bird.
Book  (1971)  Page(s) 354.  
R.ecae Aitch. in Journ. Linn. Soc. XVIII (I88O) 54 et XIX (1882) 161; Crep. in Bull. Soc. Bot. Belg. XXVII, II (1888) 102. - R. platyacantha var. kokanica Rgl. in A. H. P. V., fasc. II (1878) 313 p. p. — Ic: Aitch., I.e. XIX, tab. 8; Oliver in Hook., Ic. Plant. XIV (1881) tab. 1329; Hook. f. in Curtis Bot. Mag. LV (1899) tab. 7666 (sub R. xanthina).
Shrub, 1 m high, with flexuous shoots and gray bark; prickles of uniform length (pricklets and bristles absent), purple or whitish, erect, often inclined upward, long, thin, flattened, with considerably broadened, decurrent base, often densely crowded and contiguous; petioles and rachis often finely glandular; stipules narrow, with divergent auricles, margin finely glandular; leaflets 5—9 (11), very small, (2) 5—7 mm long, glaucescent green, oblong or orbicular, dentate or fairly bidentate, with 4—9 predominantly obtuse teeth on each side, glabrous above, glabrous or pubescent beneath, bearing minute yellowish glands. Flowers solitary, small, usually ca. 1.5, rarely to 2.5 cm in diameter; pedicels about as long as the very small hypanthium or rather longer, thin, smooth; sepals 4—5 mm long, simple, lanceolate, with dense hairs above, often lightly pubescent below, persistent, spreading or recurved; petals lemon-yellow, longer than sepals; fruit subglobose, very tiny, 6—8 mm long, black -violet, on slender pedicels. May— June.
Mountains.— Centr. Asia: Pam.-Al. Gen. distr.: Afghanistan. Described from the Kuram Valley between Habibkalla and Alikhel. Type in London (Kew).
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