ROSACEAE. — ROSA 339 



Rosa macrocarpa Watt apud Cr6pin in Bull. Soc. Bot. Belg. XXVIII. Compt. 



Rend. 13 (non M(5rat, nee Nuttall, nee Boissier) (1888). — Hemsley in Bot. 



Mag. CXXX. t. 7972 (pro synon.) (1904). — Willmott, Gen. Rosa, I. 100 



(pro synon.) (1911). 

 Rosa xanthocarpa Watt apud Willmott, Gen. Rosa, I. 100 (1911). 

 Rosa Duclouxii L6veill6 in Herb. Arnold Arb. (ex Herb. Acad. Intern. 



Geog. Bot.). 



Yunnan: Lu-tung-po, between Mengtsze and Szemao, alt. 2600 m., October 

 1899 (Veitch Exped. Seed No. 219); Mengtsze, ravines and grassy hills, alt. 

 1500-1600 m., A. Henry (No. 9098^; large climber); Szemao, alt. 1600 m., A. 

 Henry (No. 9098° ; large climber, flowers white, fragrant, yellowish in bud); with- 

 out precise locality, Ft. Ducloux. 



This variety is the wild form of the Tea Rose; it is widely dispersed in 

 southern Yunnan and has been reported from Mengtsze in the east to the fron- 

 tiers of the Shan States in the extreme southwest. The flowers vary from 

 white to yellow or pale buff or to pale pink and are dehghtfully fragrant. In tall 

 thickets and margins of woods it is a tall and rampant climber, but on the open 

 plateaus it forms a bush with arching stems and is often not more than 2 m. tall. 



Watt states that R. xanthocarpa is a distinct species chiefly distinguished by its 

 very large yellow fruit. 



Rosa odorata, var. gigantea, f. erubescens Rehder & Wilson, n. comb. 



Rosa gigantea, f. erubescens Focke in N^ot. Bot. Gard, Edinhurghj VII. 68 (1911). 



Yunnan : Lichiang valley, alt. 2500 m., May 1906, G. Forrest (No. 2049); Tali 

 valley, alt. 2000-2400 m., May 1906, G. Forrest (No. 4452). 



This form differs from the preceding variety in its pale pink often somewhat 

 smaller flowers. 



Sect. 7. CINNAMOMEAE DC. 



Clavis speciebum. 



Rami tomentosi aculeis tomentosis et aciculis muniti. Foliola rugosa, 2-5 cm. longa. 



20. R. rugosa. 



Rami glabri. 



Stipulae, eae turionum saltern, conniventia v. eonvoluta: aculei curvati. 



21. i2. davurica. 



Stipulae planae. 

 Foliola 1.5-7 cm. longa, plerumque acuta. Coryinbi saepe multiflori. 

 Corymbi multiflori. 

 Rami aculeis tantum muniti v. fere inermea. 

 Styli non y. vix exserti. 



Flores 3.5-5 cm. diam.; pedicelli setosi. Foliola subtus glabra. 



22. R. caudata. 



Flores 2-3 cm. diam.; pedicelli graciles nudi. FoHola plerumque 



eubtus pubescentia 2Z. R. banksiopsis. 



Styli plus minusve exserti, liberi. Foliola subtus pubescentia. 



Fohola7-ll, simpliciter serrata. Inflorescentia corymbosa; pedicelli 



1.5-3. em. longi 24. R. Davidiu 



Foliola 5-7, plus minusve dupliciter serrata. Inflorescentia subum- 



bellata; pedicelli graciles, 2-4 cm. longi ... 25. R. corymbulosa. 



Rami aculeis aciculis setosis intermixtis muniti. 



Folia dupliciter, raro simpliciter serrata. Flores circiter 5 cm. diam.; 



pedicelli et saepe receptacula glanduloso-setosi . . . 26. R- setipoda. 



