202 



4.— VERBENA. 



Key to species. 



Spikes linear 1. officinalis. 



Spikes ovate 2. bonariensis. 



V. officinalis, Linn. ; Benth. Fl. Hongk. 268. At Causeway 

 Bay, and on roadsides and waste places, Hongkong J 

 Lantao Island, Hongkong New Territory; Kwaisin, 

 Swatow ; Hoifung. Fl. purple, April— September. 



V. bonariensis, Linn. ; DC. Prodr. xi. 541. Waste places at 

 Kennedy town, Hongkong. Fl, lilac-coloured, July. 



5.— OALLIOARPA. 



Key to species. 



1. Calyx 4 fid 1. tomentosa. 



Calyx' truncate or 4-tootlied ... ... 2. 



2. Cymes 3-4 inches long by 3 inches wide 3. 

 Cymes 2\ inches long or less ... ... 5. 



3. Calyx glabrous 2. Reevesii. 



Calyx steUately hairy .. . ... ... 4. 



4. Leaves serrate, narrowed at both ends 3. macrophylla. 

 Leaves entire, rounded below ... ... A. integerrima. 



5. Plant subglabrous ; leaves' acuminate at 



both ends ... ... ... ... 6. 



Plant hairy, or leaves obtuse at base 7. 



6. Leaves small, shortly obtusely acuminate 5. purjjurea. 

 Leaves large, gradually acutely acum- 

 inate ... ... ... ... 6. longifoUa. 



7. Leaves attenuate or rarely rounded below 8. 

 Leaves cordate at base ... ... 8. rubella. 



8. Cymes subsessile ... ... ... 9. brevipes. 



Peduncles of cymes over one inch long 7. formosana. 



1. C. tomentosa, Willd. ; Benth. Fl. Hongk. 269. Common in 



ravines, Hongkong ; around Canton. Fl. purple, June. 



2. C. Reevesii, Wall. ; Benth. 1. c. 270. East Point and 



Wongneichong Road, Hongkong ; Kwangtung various 

 localities. Fl. purple, August. 



3. C. macrophylla, Vahl ; Benth. 1. c. 270. Hongkong without 



locality ; Taipo Road, Hongkong New Territory. Fl. 

 purple, July. 



4. C. integerrima, Champ. ; Benth. 1. c. 270. Above Bowen Road 



and elsewhere, Hongkong. Fl. purple, June, 



5. C. purpurea, Juss. ; Schauer in DC. Prodr. xi. 645. On the 



Fanling-Taipo Road, and near Sanwai, Hongkong New 

 Territory ; Hoifung ; Lienchow River ; North River ; 

 Lofoushan. Fl, purple. May — September, 



6. C, longifolia. Lam. ; Clarke in Hook. f. Fl. Brit. Ind. iv, 570, 



Cape d'Aguilar, Hongkong ; Hahang, Hongkong New 

 Territory ; near Canton ; Macao, Fl. purple, pink or 

 white, June, 



