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Transcription
Long, C. R.
1964
12
9. Two Cocos trees are alive. I saw seven Cocos fruits on the beach.
10. Four Casuarina trees are alive. The one tree on the southwest
side is now dead. All the trees are used as perches by noddies,
Fairy Terns, Boobies, and frigates.
11. Ipomoea is a conspicuous though perhaps seasonal dominant on the
interior portion of the island often covering Scaevola bushes and large
areas of Eragrostis. The flowers are blue fading to white.
12. Solanum nigrum L. - Several plants were found growing in gravel
jackets of upraised coral rock, north side of island just above the high
water mark. In flower and fruit, plant small. Dr. Beardsley remarked
at how some of the commonest insects of the other Leeward islands are
not present on Lisianski Island. This is also true of the plant life.
The soils are all sand base with varying amounts of humus under the
Scaevola and Eragrostis cover. The plant associations are not as
clearly defined as those on Laysan and remind one of the smaller,
vegetated sand islets of French Frigate Shoals or Pearl and Hermes
Reef. The inner portion of Lisianski is heavily burrowed and quite
reminiscent of the burrowed areas of the sand islets although Eragrostis
is not found on these. I estimate 95 - 97% cover on Lisanski Island.
By far the greater part of the island is covered by Scaevola and Eragrostis.
The other species are "squeezed" into any available niche. Tribulus
and Portulaca are not abundant. No Nama is present on the west side
where the wide sand shelf is missing.
The following associations were observed:
1. Boerhaavia - Tribulus - Eragrostis