niche of a thin soil oyer a moist coralline hardpan. 
Portulac ac e a .■-> 
Portulaca lutea Sol. 
Wilder 9 CbISH) as P. oleracea ,, Young 1J8 (UH), Long 2333 (UH). The 
Wilder collection was evidently misplaced since Christophersen and Caum 
mention only a field label. Found in sandy peripheral areas in 1964 but 
not common. Some seedlings "were observed in these areas. 
Leguminesae 
Young 137 (UH)o A sterile specimen which resembles Canavalia or Yigna . 
Zygophyllaceae 
Tribulus cistoide s L. 
Sibley 102 (USHM), Young 139 (UH), Long 2348 (UH). Common in sandy soil 
of the island rim with Ipomoea, Eragrostis and Boerhavia . 
Convolvulaceae 
Ipomoea indie a (Burm. f. ) Merr. 
Sibley 103 (USHM), Young 140 (UH), Long 2339, 2349 (UH). Common as 
climber over Scaevola or in dense patches over Eragrostis in the central 
clearing. Flowers blue fading to white. 
Ipomoea sp. 
Reported by Elschner (1915). 
HydrophyIda c e ae 
Rama sandwicensis var. laysanicum Brand. 
Wilder 8 (BISH), Young 136 (UH), Long 2325, 2331 (UH). In sand on 
the south, east and north sides of the island. Many seedlings observed 
in 1964. Often occurs with Boerhavia. 
Solanaceae 
Wicotiana tabacum L. 
Reported by Elschner (1915). Rot found in 1964. This species has 
naturalized, on Laysan Island. 
Solanum nigrum L. 
Long”2 318 (UH). Several plants were growing in gravel pockets of coral 
rock just above the high water line on the east side. Small plants with 
flowers and fruits were collected. 
