95 — ROSA HUGONIS Hemsl. 
Rosa Hugonis : caule erecto, 4-6 ped. alto, purpureo, verrucoso, rigido, diffuse 
ramoso, ramulfs virgatis ; aculeis biformibus, majoribus strictis, 3 lin. longis, 
acutis, basi lateraliter dilatatis, nitidis, rubris, minoribus setiformibus ; foliis cum 
petiolis 2-4 poll, longis, pallide viridibus ; foliolis 5-1 1, tenuibus, subsessilibus, 
ellipticis vel obovatis, 3-9 lin. longis, dentatis, rotundatis, interdum mucronatis ; 
rhachi filiforme ; stipulis adnatis, angustissimis, apice liberis, erectis, acutis ; floribus 
solitariis, ramulos breves laterales terminantibus ; pedunculis gracilibus, foliis 
aequantibus ; calycis tubo globoso, glabro, levi ; lobis linearo-lanceolatis, acumin- 
atis, 6 lin. longis, integris, intra tomentosis ; petalis luteis, orbicularibus vel 
obovatis, emarginatis vel rotundatis; carpellis circiter 12, hirsutissimis ; stylis 
liberis, breviter exsertis ; fructu parvo, globoso, nigro, nudo ; sepalis caducis. 
R. Hugonis Hemsley in Bot. Mag. vol. cxxxi. t. 8004 (1905). 
Stems purplish, erect, 4-6 ft. high, rigid, diffusely branched ; branches short, 
twiggy, spreading, bark verrucose. Prickles heteromorphic ; larger ones straight, 
i in. long, sharp, dilated laterally at base, bright red in colour ; smaller ones bristle- 
like. Leaves , including petioles, 2-4 in. long, pale green ; leaflets 5-1 1, thin, sub- 
sessile, oval or obovate, J-| in. long, toothed, rounded, sometimes mucronate ; 
petioles filiform ; stipules adnate, very narrow, apices free, erect,. acute. Flowers 
2-2J in. across, solitary ; peduncles slender, equalling the leaves in length. 
Calyx-tube globose, glabrous, smooth ; lobes linear-lanceolate, acuminate, \ in. 
long, entire, tomentose on inner surface. Petals yellow, orbicular or obovate, 
notched or rounded. Carpels about 12, very hairy. Styles free, shortly exserted. 
Fruit small, black, globose, naked ; sepals deciduous. 
Rosa Hugonis was first collected in western China by the Rev. 
Hugh Scallan. The exact habitat is not known, but there is good 
reason to believe that it is in the province of Shan Hsi. The plant at 
K ew was raised from seeds received from the British Museum in 
1904. It is quite hardy in this country, and its habit suggests Prunus 
japonica Thunb. Mr. Hemsley named it in compliment to its dis- 
coverer and gave it specific rank, believing it to be sufficiently distinct 
from Rosa xanthina Lincll., Rosa platyacantha Schrenk, and Rosa 
Ecae Aitch., to warrant him in doing so. Crepin referred both Rosa 
platyacantha and Rosa Ecae to Lindley’s Rosa xanthina , and Sir 
J. D. Hooker 1 and Franchet 2 have followed him. Mr. Baker gave 
1 Bot. Mag. vol. lv. t. 7666 (1899). 
2 Nouv. Arch. Mus. ser. 2, vol. v. p. 269, t. 15, fig. 2 ( Plantae Davidianae , vol. i. p. 117 [1884]) (1883). 
279 VOL. II. — G 
