Vitis 



VITACEAE 



Vitis 



aa. 



shallowly dentate; petioles 1.5-3 cm long. 2. V. chungii 

 Lvs. rufous-hairy on the nerves beneath; 

 lower surface gray-pubescent; margins 

 remotely serrate; blades sessile or short- 



petiolate 3 . V. Itancockii 



ee. Lvs. broadly ovate, triangular-ovate or sub- 

 orbicular, 

 f. Plants more or less pubescent. 



Slender trailing vine with membranous 

 ovate-acuminate remotely dentate lvs. 

 3-8 cm. broad which become almost 



glabrous at maturity 4 . V. flexuosa 



More robust woody vines with sub-coriace- 

 ous broad-ovate cordate or subcordate 

 rounded, acute or briefly acuminate 

 dentate or denticulate lvs. 5-12 cm. 

 broad; lower surface more or less 

 pubescent at maturity. 

 Fr. blue-black: hairs along the nerves 

 of the lvs. beneath gray or whitish. 

 Fr. black, with waxy bloom: hairs along 

 the nerves of the lvs. beneath tawny 



or brownish 6 . 



ff. Plant glabrous: lvs. sub-orbicular to broad- 

 ovate, 5-12 cm. broad; margin notched 

 with triangular teeth: fr. dull purple, 



not bloomy 7 . 



dd. Lf. blades densely and persistently tomentose 

 beneath. 

 Lvs. small, ovate-cordate, acute at apex, 2.5-4 

 cm. long, densely short-pubescent above: 



brts. densely light-brown-pubescent 8. V. hui 



Lvs. large, broad-ovate or orbicular-ovate, often 

 shallowly 3-lobed, 6-15 cm. wide, glabrous 

 above: brs. flocculose-pubescent. 

 Tendrils continuous, i.e. a tendril or an infl. 

 at every node: lvs. rarely deeply lobed, 

 with rounded sinuses: introduced and plant- 

 ed for its fr 9. V. labrusca 



Tendrils intermittent, i.e. a tendril or an infl. 

 at every 3rd node: lvs. often shallowly 3- 



lobed: native vine of thickets and woodland. 10. V. quinquangularis 

 cc. Lvs. deeply 3-lobed, with rounded sinuses. 



Tendrils, continuous, i.e. a tendril or an infl. at each 

 node: vines introduced and cultivated for their fr. 

 Tendrils intermittent, i.e. some nodes without tendril 

 or infl.: vines native in thickets: lf. blades 

 glabrous above, usually densely tomentose be- 

 neath 11. 



Lvs., or some of them ternately compound, rufouspubescent 

 beneath; lateral lfts. very oblique, sessile or nearly so; 

 terminal lfts., or some of them, conspicuously stalked 12. 



5. V. betulifolia 



V. wilsonae 



V. rotundifolia 



9. V. labrusca 



V. thunbergii 

 V. piazeskii 



1. Vitis davidii (Carr.) Foex Mi\^ (Tz'u P'u T'ao; Thorny Grape) (R.M. 615.) 



244 



