Geum 



ROSACEAE 



Rosa 



13. Geum Linn. Avens 7kt§HM (Shui Yang Mei Shu; Water Myrica Genus) 

 Perennial herbs ivith pinnately compound or lyrate Ivs.: fls. solitary or clustered, 

 5-parted, yellow, white or red; calyx tube bell-shaped or flattened, the lobes usually 

 with alternating bractlets: receptacle conical or cylindrical, bearing many achenes with 

 long persistent styles. Over 50 species, in temperate and cold regions; one in China. 

 (An old Latin name.) 



1. Geum aleppicum Jacq. (G. strictum F. & H., not Ait.) itm~X^ (She Chieh Ta 



Ts'ao; Snake- jointed Great Herb) (G.M. 817). Herb, to lm.; fls. yellow, VII; 



fr. VIII-IX. Eurasia, North America; locally in An., Che., Ki. Meadow and 

 brushland. 



14. Rosa Linn. Rose ^'$AM (Ch'iang Wei Shu) 

 Erect or climbing shrubs, usually with prickly stems: Ivs. pinnately compound, with 

 stipules joined to the petiole: fls. solitary or in clusters, white, pink, or red, up to 8 

 cm. in diam.; calyx lobes and petals usually 5; stamens and pistils numerous: re- 

 ceptacle urn-shaped, forming at maturity a somewhat fleshy hip which encloses several 

 to many achenes. Over 100 species, in temperate and subtropical regions, especially 

 in the northern hemisphere; over 50 species in China. (The Latin name.) 



Key to the Species 

 a. Styles much exserted beyond the mouth of the receptacle: stipules 

 adnate to the petiole. 



b. Styles united into a column, usually as long as the stamens; 

 fls. white. 



c. Lfts. usually 3, lanceolate; stipules irregularly dentate 1. R. triphylla 



cc. Lfts. 5-9. 



d. Stipules pectinate: prickles usually infrastipular: 



styles glabrous ■■ 2. R. multiftora 



var. cathayensis 



dd. Stipules entire or denticulate: prickles scattered. 



Lfts. acute or acuminate, 3-10 cm. long: stems often 

 vining. 

 Prickles straight or slightly curved: lfts. green 



beneath 3. R. moschata 



Prickles hooked: lfts. glaucescent beneath 4. R. henry i 



Lfts. obtuse or slightly acute, 1-2.5 cm. long: an 



upright shrub 5. R. souliajia 



bb. Styles free, about half as long as the stamens: lfts. usually 3- 



5: fls. red or pink 6. R. chinensis 



aa. Styles not or only slightly exserted, forming a head closing the 

 mouth of the receptacle. 



e. Stipules free or adnate at the base: fls. white or yellow: stems 

 climbing. 



Pedicels and receptacle smooth: stipules subulate: fls. clu- 

 stered, 2-4 cm. across. 



Fls. in umbels 7 - R - banksiae 



Fls. in corymbs 8 - R - cymosa 



Pedicels and receptacle bristly: stipules denticulate: fls. 



solitary, large 9 - R - laevigata 



ee. Stipules adnate: fls. purple: an upright shrub 10. R. rugosa 



1. Rosa triphylla Roxb. mftiWM (Yin Fen Ch'iang Wei; Silver-powder Rose) (R.M. 



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