1548 



ROSA 



Roses," with 160 colored plates (1817-1820). It is 

 quoted below as Red. Ros, As the nrst edition m folio 

 is found in only very few libraries, the smaller edition 

 is cited in parenthesis by volume, groups and the 

 sequence of the plates, neither pages nor plates being 

 numbered continuously in this edition. 



The economic properties of the Rose are of little im- 

 portance. The most valuable product is attar of Roses, 

 a highly fragrant essential oil. It is chiefly manu- 

 factured in southeast Europe and western Asia from 

 Mosa alba and R. Damaseena, and of late this industry 

 has been successfully transplanted to Germany, bee 

 Perfumery Gardening, Vol. III. The fruits of some 

 species, especially of B. villosa and R. canina, are 

 made into preserves. 



For general notes on culture, see Hose. 



KEY TO THE GROUPS 



(For a horticultural classification of Roses, founded prima- 

 rily on garden values, see the article Rose.) 



A. Lvs. simple, without stipules: fls. yellow ... 



Subgenus Hulthemia (Species No. 1) 



AA. Lvs. pinnate, stipulate 



Subgenus Eurosa (Species Nos. 2-50) 

 B. Styles exserted beyond the mouth of the re- 

 ceptacle. 

 C. Exserted styles connate into a column. 



(See Fig. 2150 right.) 

 Climbing or creeping: style about as long as 



stamens SECTION I. SYSTYL^E (Species Nos. 2-8) 

 Upright, wilh arching branches : styles shorter 



than stamens 



SECTION II. STYLOS^E (Species No. 9) 



ROSA 



CC, Exserted styles free. 



Lfts. usually 8-5: peta Is 5 or more 



SECTION III. INDICT (Species Nos, 10-13) 

 Lfts. usually 7-9, small: petals usually 4, white., 



SECTION XI. SERICE^E (Species No. 45) 

 BB. Styles reaching only the month of the re- 

 ceptacle and stigmas forming a sessile 

 head over it (see Fig. 2150). 

 c. Stipules free or almost free: sarmentose 

 or climbing shrubs: fls. white or yellow. 

 D. Branches glabrous: Ifts. 3-5, stipules 



small, entire. 

 Fls. small, umbellate, yellow or white: pedicels 



and receptacle smooth 



SECTION IV. BANKSJ.E (Species Nos. 14,15) 

 fls. large, solitary, white: pedicels and recep- 

 tacle prickly 



SECTION XIV. L^VIGAT^E (Species No. 49} 

 DD. Branches tomentose or pubescent: Ifts. 

 7-9; stipules pectinate: fls.l or few, 

 white, with large bracts at the base 

 of the short pedicel: receptacle to- 

 mentose 



SECTION XIII. BRACTEAT^E (Species No. 48) 

 CO. Stipules adnate. 



D. Lvs. of flowering branchlets 35-folio 

 late, large and firm: stems usually 

 with prickles and bristles: fls. up- 

 right, on long pedicels: receptacle 

 bristly: sepals re flexed after flower- 

 ing, caducous 



SECTION V. GALLIC^E (Species Nos. 16-19) 

 DD. Lvs. of flowering branchlets 5-9-folio- 

 late (rarely S-foliolate, the fls. then 

 short-pedicelled, with smooth recep- 

 tacle). See ODD, next page. 

 E. Fls. usually corymbose; if solitary, 



pedicels with 1 or more bracts. 

 F. Stems with only one kind of 

 prickles, sometimes mixed with 

 glandular bristles : prickles 

 usually hooked, stout, scattered: 

 outer sepals usually pinnate... 

 SECTION VI, CANINE (Species Nos. 20-23) 

 FF. Stems, at least at the base, with 

 usually straight often slender 

 prickles and numerous bristles 

 gradually passing into prickles. 

 Sepals after flowering spreading, usually entire, 

 caducous: fr. usually hispid, with the akenes 



only at the bottom. (See Fig. 2148 c.) 



SECTION VII. CAROLINA (Species Nos. 24-28) 

 Sepals after flowering upright, usually entire, 

 rarely caducous: fr. usually smooth, with the 

 akenes at the bottom and wall. (See Fig. 



2148 a, b.) 



SECTION VIII. CINNAMOMEA (Species Nos. 29-41} 



2148. Various forms of Rose hips. About natural size, 

 a, Rosa rugosa; b. R. pendulina; c, R. humilis. 



