ROSACEAE. — ROSA 339 



Rosa macrocarpa Watt apud Cr<5pin in Bull. Soc. Bof. Belg. XXVIII. Compt. 



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



Mag. CXXX. t. 7972 (pro synon.) (1904). — Willmott, Gen. Rosa, 1. 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 (Vcitch 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, Fr. 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 delightfully 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 Not. Bot. Gard. Edinburgh, 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 specierum. 



Rami tomentosi aeuleis tomentosis et acicuHs muniti. FoUola rugosa, 2-5 cm. longa. 



20. R. rugosa. 

 Rami glabri. 



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



21. R. davurica. 

 Stipulae planae. 



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

 Corymbi multiflori. 



Rami aeuleis tantum muniti v. fere inermes. 

 Styh non v. vix exserti. 



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



22. R. caudata. 

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



subtus pubescentia 23. ^. banksiopsis. 



Styli plus minusve exserti, liberi. Foliola subtus pubescentia. 



Fohola7-ll, simpliciter serrata. Inflorescentia corymbosa; pedicelli 



1.5-3. cm. longi 24. R. Davidii. 



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

 bellata; pedicelh graciles, 2-4 em. longi . . .25. R. corymbulosa. 

 Rami aeuleis aciculis setosis intermixtis muniti. 



t'olia dupliciter, raro simpliciter serrata. Flores circiter 5 cm. diam.; 

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



