- 
yet it does not necessarily follow that paucity of species or the 
of @ genus denotes a comparatively recent immigration. = 
9 eriqeetr| procnpiahenygrmetngetog hy ar supposi 
96 : BOTANICAL GAZETTE [AUGUST 
H. anomalum, Vitex trifolia, Ipomoea pes-caprae, I. acetosaefolia, 
I. bona-nox, I. tuberculata, Vigna lutea, Mucuna gigantea, Batis 
maritima, Sesbania tomentosa, Capparis sandwichiana, Erythrina 
monosperma, Ruppia maritima, Colubrina asiatica, Dioclea violacea, 
\Strongylodon lucidum, Caesalpinia Bonducella, Cassytha filiformis, 
and numerous, grasses and sedges. 
Hitcucock cites Pandanus as a typical current disseminated 
ee 
illustration of the origin of the vegetation is the screw pine, 
Peek or lau hala..... These seeds will stand saturation in water for 
months without osiak their vitality. Hence they may be carried hundreds 
or thousands of miles from the place of their nativity, and when washed 
inland by unusually high waves will be placed where they will sprout and 
grow up. I once saw a place in Kauai where hundreds of young lau halas 
had started to grow near the seashore. . . . . There is no tree with wider range 
in the Pacific than the Pandanmus. And it was in existence in the Triassic 
period in Europe. It is therefore one of the oldest and most persistent of 
plants, and the one best fitted to start plant life on the isolated volcanic islands 
for the first Heh, Peet ete Oe 
Duration of ‘heute 
The philosophical presentation of the status of Hawaiian plant — 
immigrants with reference to the evolution of endemic forms has 
Boose oinanlted Pehl neeee eg Add big es area oe pcs 
his statement is given here. : 
Although endemicity of plant or insect, present ‘hy : eas 
f numk f allied ot naturally 
> 
ssdicatac a scp aiid clcietion OF ema Ase aad aeto 
apodemicit 
