358 



7. L. clavatum, Linn. ; Bak. ]. c. 26. Top of Phoenix Mt., 



Swatow. 



8. L. carolinianum, Linn. ; Bak. 1. c. 28. High mountain east of 



Wongneichong in a swamp and on top of hills at North 

 Point, Hongkong ; in a swamp east of Shatin Pass 

 road, Hongkong New Territory. 



3.— PSILOTUM. 



1. P. triquetrum, Swartz ; Bak. Fern Allies, 30. Mt. Victoria, 

 Mt. Gough, and in the Happy Valley woods in crevices of 

 rocks, Hongkong. 



SELAGINELLACEAE. 

 1.— SBLAGINELLA. 



Key to species. 



1. Bracts of spikes uniform 

 Bracts of spikes dimorphous ... 



2. Main stems decumbent 

 Main stems ascending or erect 



3. Base of leaves of lower plane ciliated on 



upper side 



Base of leaves not ciliated 



4. Leaves of the lower plane oblique, sub- 



ovate, blue-green ... 

 Leaves of the lower plane oblong- 

 lanceolate, pale green 



5. Leaves rosulate 

 Leaves not rosulate 



6. Stems ascending 

 Stems erect 



7. Leaves \ to ^ inch long; stems ^ to 



1 foot long ... 

 Leaves j^ to ^ inch long; stems 1^ to 

 4 feet long, sarmentose 



8. Leaves of lower plane much imbricated 



over the stem, close together 

 Leaves of lower plane shghtly imbri- 

 cated over the stem, spaced 



9. Main stems ascending ... 

 Main stems decumbent 



10. Spikes ^ to 1 inch long 



Spikes ^ to ^ inch long 



11. Bracts of spikes more than 1 line 



diameter 

 Bracts of spikes | to 1 line diameter . . , 



12. Bracts of upper plane cuspidate 

 Bracts of upper plane lanceolate 



1. S. uncinata, Spring ■ Bak. Fern. Allies, 48. Victoria Peak 

 and Mt. Grough, Hongkong ; Lantao Island, Hongkong 

 New Territory; Chaochaufu, ' & a 



2, 

 9. 

 3. 



5. 



4. concinna, 



4. 



1. 'uncinata. 



2. semicordata. 



6. involvens. 



6. 

 7. 



8. 



5. atroviridis. 



7. canaliculata, 



8. caulescens. 



9. flahellata. 

 13. tenera. 



10. 



3. plumosa. 



11. 



12. 

 12. heterostachys. 

 11. pronijhra. 

 10. xiphiolepis. 



