Heller : plants of the Hawaiian islands. 793 



SELAGINELLA Beauv. Prodr. Aetheog, 101. 1805. 



Selaginella arbuscula (Kaulf.) Spring. Monog. Pam. Ly- 

 cop. 2 : 183. 1848. 

 Lycopodium arbuscula Kaulf. Enum. Pil. 19. 1824. 

 On moist rocks, at 1200 feet elevation, at the Nuuanu Pali, 

 Oahu. The plants were small and not very plentiful. 

 March 23 (1993). 



Selaginella flabellata (L.) Spring. Monog. Pam. Lycop. 2:174. 



•1848. 

 Lycopodium fiabdlatum L. Sp. PI. 1105. 1753. 

 On the ground; a rather common species, colleted at 2500 

 feet and more on Konahuanui, Oahu (2180), and at 3000 feet on 

 the ridge west of the Hanapepe river, Kauai (2499). Original 

 locality, "America calidiore." 



Lycopodium menziesii H. & G. Enum. Pil. No. 131. 



Collected at about 500 feet elevation in Pauoa valley, Oahu, 

 where it grew on rocks. Among the specimens from this place 

 were some of an elongate form (2009). On Kauai, it was col- 

 lected on the stones at the foot of Hanapepe falls, where it was 

 kept continually moist by the spray from the falls (2558). 



NAIADACEAE. 

 • ■ POTAMOGETON L. Sp. PI. 126. 1753. 



Potamogeton foliosus Raf. Med. Rep. (II) 5:354. 1808. 

 Potamogeton pauciflorus Pimsn, Fl. Am. Sept. 121. 1814. 



In lower Pauoa, Oahu, at about 50 feet elevation, in taro 

 patches (2387), apparently introduced. On Kauai it was col- 

 lected in a pool along the Hanapepe river, near the falls, at an 

 elevation of about 700 feet, and in a similar situation at the 

 second fall of the Wahiawa, elevation 2000 feet. It is certainly 

 native at the Kauai station. This species has always been con- 

 sidered peculiar to North America, hence its occurrence in the 

 Islands is of considerable interest. 



Michaux, in Flora Bor. Am. i:102, doubtfully referred this 

 species to P. gramineum L. 



June 4 (2387); July 12 (2555); original locality, "in rivjs af- 

 fluente mari inundatis Carolinae inferioris." 



