29 
Nyctaginaceae 
Boerhavia diffusa L. 
Sibley 101 (USNM), Young 134 (UH), Long 2321, 2324, 2328, 2336, 2350 
(UH). Pound over most of the island. In Scaevola thickets the stems grow 
over the surface of the lover shrubs. This species appears to he a pioneer 
in sandy areas. Flowers Vary in color from a lavender-pink to white. 
Many seedlings observed in 1964. 
Aisoaceae 
Sesuvium portulacastrum L. 
Wilder 6 (BISH). Only one collection exists. It is possible that 
during the denudation of the island the sites on which this common species 
is usually found were drifted With sand,thus closing the preferred ecological 
niche of a thin soil over a moist coralline hardpan. 
Port ulacace ae 
Portulaca lutea Sol. 
Wilder 9 (BISH) as P. oleracea , Young 1J8 (TJH), 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. 
Leguminosae 
, * 
Young 137 (UH)* A sterile specimen which resembles Canavalia. or Vigna. 
• A 
Zygophyllaceae 
_ ' A - ■ ; ' \ 
Tribulus cistoides L. 
Sibley 102 (USMM), Young 139 (bH), Long 2348 (UH). Common in sandy 
soil of the island i*im with Ipomoea, Eragrostis and Boerhavia . 
/ 
