354 



2. Pinnae 3 ... ... ... ... 2. triphyllum. 



Pinnae more than 3 ... ... ... 3. 



3. Edge of pinnae finely toothed ... 3. serratum. 

 Edge of pinnae not finely toothed ... 4. cuspidatum. 



1. M. simplex, Hook. ; Hook, et Bak. 1. c. 390. In Glenealy 



ravine, Happy Valley woods, Little Hongkong and 

 elsewhere, Hongkong ; Taimoshan and Mirs Bay, Hong- 

 kong New Territory ; hill near Chaochaufu. 



2. M. triphyllum, Swartz ; Hook, et Bak. 1. c. 391. Whampoa ; 



Lienchow River. 



3. M. serratum, Cav. ; Hook, et Bak. I. c. 392. Lienchow Eiver. 



4. M. cuspidatum, Blume ; Hook, et Bak. 1. c. 392. Taimoshan 



at 2600 ft., Hongkong New Territory ; Pak-kwa-ngan 

 near Phoenix Mt., Swatow. 



38.— VITTARIA. 



Key to species. 



1. Sori sunk in a 2-lipped marginal groove 2. 

 Sori in a slightly intra-marginal line ... 3. 



2. Veins obscure ... ... ... ... \. Jilipes. 



Veins plain ... ... ... ... 2. elongata, 



3. Midrib distinct ; fronds 6 to 18 inches 



long, li to 4i lines broad ... ... 3. lineata. 



Midrib indistinct ; fronds 10 inches long, 



under 1 line broad ... ... ... 4. caricina. 



1. V. fllipes, Christ in Bull. Acad. Geogr. Bot. 1907, 150. Slopes of 



Phoenix Mt., Swatow. 



2. V. elongata, Swartz ; Hook, et Bak. Syn. Fil. 395. Lof oushan. 



3. V. lineata, Swartz ; Hook, et Bak. 1. c. 396. Taimoshan, 



Hongkong New Territory ; slopes of Phoenix Mt., Swatow. 



4. V. caricina, Christ in Bull. Acad. Geogr. Bot. 1904, 109. 



Chaochaufu. 



S9.-DRYM0GL0SSUM. 



1. D. oarnosum, Hook. ; Hook, et Bak. Syn. Fil. 397. Common 

 on rocks and trees in the Happy Valley woods and else- 

 where, Hongkong ; Lantao Island and Taimoshan, Hong- 

 kong New Territory ; near Chaochaufu. 



30.— HEMIONITIS. 



1. H. Griffithii, Hook f. et Thorns. ; Hook, et Bak. 1. c. 399. 

 Taimoshan at 2800 ft., Hongkong New Territory. 



31.-A0ROSTI0HUM. 

 Key to species. 



1. Fronds simple 1. austro-sinicum. 



Fronds pinnate ... .. ... ... 2. 



2. Barren fronds under 6 inches long ... 4. quercifolium. 

 Barren fronds more than 6 inches long 3. 



