171 



3. Leaf less than twice as long as glabrous 



petiole ... ... ... ... 4. 



Leaf four times as long as downy petiole 3. Cynanchum affine. 



4. Corona tubular, toothed at mouth ... 5. Cynanchum 



corymbosum. 

 Corona deeply 5 -lobed ... ... ... 2. Cynanchum 



auriculatum. 



5. Leaves more than half as broad as long 6. 

 Leaves less than half as broad as long 7. 



6. Leaves glabrous ... ... ... Dregea volubilis. 



Leaves pubescent ... ... ... Tylophora hispida. 



7. Stem erect ... ... ... ... 6. Cynanchum 



Lightii. 

 Stem twining ... ... ... ... 8. 



8. Flowers racemose ... ... ... Graphistemmapictum. 



Flowers umbellate ... ... ... 9. 



9. Leaves membranous ... ... ... 7. Cynanchum 



sublanceolatum. 

 Leaves somewhat leathery ... ... 4. Cynanchum 



Fordii. 



1. C. atratum, Bunge ; DC. Prodr. viii. 523. Kwangtung without 



locality. Fl. dark purple, April. 



2. C. auriculatum, Royle ; Hook. f. Fl. Brit. Ind. iv. 25. Lienchow 



River ; Northwest River. Fl. yellowish white, August. 



3. C. aflBne, Hemsl. Enum. PI. China ii. 104. Kwangtung without 



locality. Fl. yellow, August. 



4. C. Fordii, Hemsl. 1. c. 106. Lofoushan at 800 ft. Fl. white or 



reddish, August. 



5. C. corymbosum, Wight ; Hook. f. Fl. Brit. Ind. iv. 24. N.W. 



River. Fl. , August. 



6. C. Lightii, Dunn sp. n., C. sibirico, R. Br. affinis sed foliis 



brevioribus et latioribus distincta. 



Herba perennis, erecta, 30-40 cm. alta, praeter lineam 

 pubesoentem secus internodia superiora pedunculosque 

 glabra, caulibus foliosis ex radice crassa fibrosa pluribus, 

 basi nonnunquam paullo ramosis. Folia opposita, oblongo- 

 lanceolata, apice rotundata, basi cuneata vel breviter 

 rotundata, subsessilia, 3-4 cm. longa, circiter 1 cm. lata, 

 Integra, papyracea, obscure penninervia. Floras umbellati 

 vel breviter racemosi ; pedunculi axillares, 1-1 "5 cm. longi, 

 basi braeteis brevibus linearibus suffulti. Calyx fere ad 

 basin divisus, lobis 5 lanceolatis 1'5 mm. longis. Corolla 

 luteola?, rotata, 8 mm. diam., lobis ovatis obtusis. 

 Androecium 3 mm. diam., 2 mm. altum ; coronae lobi 

 rotundati, antheris aequales. Capsula 5 cm. longa, 6 mm. 

 lata, fusiformis. 

 Shuikwan River, Shaochaufu 14.11.88 and North River, 6.8.89 

 Loquai. Also Hunan Province, Hengshan, Light, 

 Sept. 1904. Flowers in August and September, fruits 

 in November. 



One of the specimens on which this species is founded formed 

 part of a remarkable collection hastily gathered by Capt. 

 Light of the 114th Mahratta Light Infantry during atrip 



