ROSACEAE. — ROSA 333 



Western Szech'uan: Tachien-lu, woodlands, alt. 3000-3600 m., 

 October 1910 (Nos. 4095, 41 18; bush 1-2 m. tall, fruit scarlet) ; Chien- 

 chi Hsien, Ta-hsiang-ling, open country, alt. 2000-2800 m., May 1908 

 (No. 3597; bush 1.5 m. tall, flowers white); west of Romi-chango, 



thickets, alt. 2300-3300 m., July 3, 1908 (No. 3594; bush 1-3 m. tall, 

 fruit red). 



This form is very common on the windswept mountain-sides of western Szech'uan, 

 especially near the village of Nitou in Chien-chi Hsicn at the extreme western 

 hmit of the Red Basin of Szech'uan. The leaflets have usually a more prominent 

 venation, and the fruit has usually a shorter foot-stalk than in the typ^t but these 

 characters vary. Decurrent prickles are an inherent character in the species and 

 may occur on any vigorous shoot; moreover, a parent plant may be almost without 

 prickles, and seedlings raised from it may have large decurrent prickles. Such a vari- 

 able and unstable character, though very striking, has no real taxonomic value. 



CONSPECTUS SECTIONUM ET SPECIERUM SINENSIUM. 



Clavis sectiontjm:. 



Styli connati in columnam exsertam plerumque stamina aequantem. 



Sect. 1. SYNSTYLAE. 

 Styh liberi, vix v. interdum breviter exserti. 

 Stipulae basi tantum v. interdum fere ad medium petiolo adnatae, saepe 

 lacinatae. 



RamuU glabri. Folia 3-5-foliolata; stipulae integrae, deciduae. 



Receptaculum nudum; flores umbellati. Stipulae subulatae, integrae; folia 

 3-5-foliolata Sect. 2. BANKSIANAE. 



Receptaculum setosum : flores solitarii. Stipulae denticulatae; folia 3-folio- 

 lata Sect. 3. LAEVIGATAE. 



Ramuli et receptaculum tomentosa. Folia 7-9-foliolata; stipulae pectinatae, 

 interdum ad medium adnatae. Florea sohtarii v. pauci. 



Sect. 4. BRACTEATAE. 

 Stipulae totae auriculis liberis exceptis petiolo adnatae, non laciniatae. 

 Flores corymbosi, si sohtarii, peduncuUs basi bractea v. bracteis suffultis. 

 Receptaculum aculeatum, depresso-globosum. Stipulae angustae auriculis 

 subulatis. Sepala exteriora pinnata. . Sect. 5. MICROPHYLLAE. 

 Receptaculum nudum v. hispidum. Stipulae plerumque latae. Sepala ple- 

 rumque Integra. 

 Styli exserti, liberi, plerumque dimidia stamina aequantes. Folia 3-7-folia- 



lata, persistentia v. subpersistentia Sect. 6. INDICAE. 



Styli non v. raro paullo exserti. Folia 5-15-folioIata. 



Sect. 7. CINNAMOME.VE. 



Flores solitarii, pedicello basi ebracteato. 

 Petala 5. 

 Foliola 5-7 in ramulis floriferis. Rami aculeis plerumque recurvia validis 

 muniti, eetis destitutis. Sepala plerumque pinnata; petala lutea. 



Sect. 8. LUTEAE. 



Foliola plerumque 9 in ramuHs floriferis. Rami aculeis rectis gracilibus 

 setis intermixtis muniti. Sepala integra; petala, alba, rosea v. lutea. 



Sect. 9. PIMPINELLIFOLIAE. 



Petala 4, alba; sepala integra: styh leviter exserti. Foliola 5-17. 



Sect. 10. SERICEAE. 



