357 



EQUISETACEAE. 



1.— EQUISETUM. 



1. E. debile, Roxh. ; Bak. Fern Allies, 5, South of Victoria Gap, 

 northwest of Mt. Kellet, above Pokfulam reservoirs, and 

 near Victoria fort, Hongkong; Taimoshan, Hongkong 

 New Territory ; Lienchow Eiver ; Lofoushan. 



LYCOPODIACEAE. 



Key to genera. 



Leafy ; sporangia orbicular, 1-celled, 

 2-valved 



Leafless ; sporangia turbinate, 3-celled, 

 3-valved 



1. Lycopodium. 



2. Psilotum, 



1.— LYCOPODIUM. 



Key to species. 



1. Sporangia not in distinct terminal spikes 

 Sporangia in distinct terminal spikes... 



2. Leaves unaltered ; sporangia ina xils of 



leaves 

 Leaves gradually passing into bracts ; 

 spike indistinct 



3. Leaves sedated; sporangia all down 



the stem 

 Leaves not serrated ; sporangia at the 

 top of stem... 



4. Leaves multifarious 



Leaves dimorphous, distichous 



5. Spikes dichotomously forked; leaves 



4 to f inch long ... ,.. 



Spikes not dichotomously forked; leaves 

 under \ inch long ... ... . . .■ ' 



6. Spikes panicled, 1 to 3 inches long ... 

 ' Spikes not panicled, ^ to | inch long... 



7. Leaves conspicuously decurrent 

 Leaves not decurrent ... 



3. Fordii. 



2. serratum. 



1. Hamiltonii. 



5. 

 8. carolinianum. 



4. Phlegmaria. 



6. 



7. 



5. cernuum. 



6. casuarinoides. 



7. clavatum. 



1. L. Hamiltonii, Spreng. ; Bak. Fern Allies, 10. Lofoushan. 



2. L. serratum, Thunh. ; Bak. 1. c. 12. Taimoshan, Hongkong 



New Territory ; Kwaisin, Hoifung ; Lofoushan. 



3. L. Fordii, Bak. 1. c. 17. Lantao Island, Hongkong New 



Territory ; Hoifung ; Lofoushan. 



4. L. Phlegmaria, Linn. ; Bak. 1. c. 22. Tingushan on trees ; 



Lanfa Mt. on tree trunks, Hoifung. 



5. L. cernuum, Linn. ; Bak. 1. c. 23. Very common on the hills 



in Hongkong and Hongkong New Territory ; hills near 

 Chaochaufu. 



6. L. casuarinoides, Spring ; Bak. 1. c. 24. Taimoshan and 



Lantao Island at 2700 ft., Hongkong New Territory ; 

 stream near Chaochaufu ; Hoifung ; Lofoushan. 



21515 



3 A? 



