138 
44. Flowers white or ee T es ll. Aster (p. 140). 
lowers yellow ise 45. 
45. Involucral bracts in single? row ... 39. Senecio (p. 148). 
Involucral bracts imbricated 
46. Ray florets about 8 iis .. 6. Solidago (p. 140). 
ay florets very numerous 22. Inula (p. 144). 
47. Scapose perennia : 44, Gerbera (p. 149). 
Small prostrate annual 
. Soliva (P; 146). 
48. Achenes beaked 
Achenes not beaked 50: 
49. Leaves cauline 48. Lactuca (p. 150). 
Leaves radical Tm .. 45. Tararacum (p. 149). 
50. ect bracts imbricate in 
es vie 51. 
Gage basis 1 in a single row 
with a few small outer bracts 53. 
51. Leaves cauline  ... eee 49. Sonchus (p. 150). 
Leaves SEN : : ... 50. Launaea (p. 151). 
52. Pappus scaly ak A e. 4, Ageratum (p. 139) 
Pappus setose . tos i.  l. Vernonia (p. 138) 
53. Pappus wan i eee .. 45, Lapsana (p. 149) 
Pappus present ve .. 46. Crepis (p. 150) 
1.—VERNONIA. 
Key to species. 
pæ 
. Involucral bracts . 
Involucral iain oblong, obtuse 
Peo 
2. Achenes glabro id 
chenes oe dis 
3. Heads scattered A sie Ll. chinensis. 
eads in a terminal corymb 2. saligna. 
4. n on short lateral branches 3. Clivorum. 
a terminal corymb . 4. cinerea. 
5. Dosa bracts woolly all over 5. solanifolia. 
Involucral bracts woo Bs on a 
only... 6.. Andersoni. 
1. V. chinensis, Less. ; Benth. Fl. Hongk. 169. Common in 
waste places, Hongkong ; ; Lantao Island, Hongkong New 
erritory ; on the river bank near com haufu ; Canton ; 
Lofoushan. Fl. purple, April-Octobe 
2. lies ee ; Hook. f. Fl. Brit. inti iii. 235. On the south 
fest Ferr October 
5. V. so Benth. l. c. 169 
coner at 1500 ft., Ho ongko 
near Chaoc 
BR light parpi. F ae 
