| One-seeded stones. | Two-seeded stones. | Three-seeded stones. | |
|---|---|---|---|
| Inland tree (P. serratifolia) | 73 per cent. | 23 per cent. | 4 per cent. |
| Coast tree (P. taitensis) | 92 per cent. | 8 per cent. | — |
NOTE 33 (page [63])
De Candolle’s List of Plants dispersed exclusively by Currents
Drepanocarpus lunatus; Ecastaphyllum Brownei; Mucuna urens, D.C.; Tephrosia piscatoria; Hibiscus tiliaceus; Rhizophora mangle; Guilandina Bonduc, Linn.; Ipomœa pes capræ; Canavalia obtusifolia.
I have experimented on the buoyancy of the fruits and seeds of all these plants excepting the two first named. In five species the seeds float in sea-water unharmed for several months. With Rhizophora it is the floating seedling that disperses the plant. Neither the pods nor the seeds of Tephrosia piscatoria are suited for dispersal by the currents.
NOTE 34 (page [64])
The Littoral Plants of the Easternmost Polynesian Islands
Except in the case of Hernandia peltata my authority here is the Botany of the “Challenger” Expedition. Mr. J. H. Maiden gives some further details of the flora of Pitcairn Island in a more recent paper (Austral. Assoc. Rep., Melbourne, 1901, vol. 8), and Hernandia peltata is included in his list.
NOTE 35 (page [68])
Distribution of the Littoral Plants with Buoyant Seeds or Fruits that are found in the Fijian, Tongan, Samoan, Tahitian, and Hawaiian Groups
This list probably contains nearly all the species of the Polynesian region, but it is not implied that these plants have been recorded from all the groups (vide infra).
(a) Species found only in the Old World.—Calophyllum inophyllum, Hibiscus diversifolius, Thespesia populnea, Heritiera littoralis, Kleinhovia hospita, Carapa moluccensis, C. obovata, Smythea pacifica, Colubrina asiatica, Mucuna gigantea, Erythrina indica, Strongylodon lucidum, Dalbergia monosperma, Pongamia glabra, Inocarpus edulis, Derris uliginosa, Afzelia bijuga, Barringtonia racemosa, B. speciosa, Rhizophora mucronata, Bruguiera Rheedii, Terminalia Katappa, T. littoralis, Lumnitzera coccinea, Pemphis acidula, Morinda citrifolia, Guettarda speciosa, Wedelia biflora, Scævola Kœnigii, Cerbera Odollam, Ochrosia parviflora, Cordia subcordata, Tournefortia argentea, Ipomœa glaberrima, I. grandiflora, I. peltata, Aniseia uniflora, Clerodendron inerme, Vitex trifolia, Hernandia peltata, Excæcaria Agallocha, Tacca pinnatifida, Cycas circinalis, Pandanus odoratissimus, Scirpodendron costatum.
(b) Species occurring in both the Old and New Worlds.—Hibiscus tiliaceus, Suriana maritima, Ximenia americana, Dodonæa viscosa, Canavalia obtusifolia, C. ensiformis, Vigna lutea, Sophora tomentosa, Cæsalpinia Bonduc, C. Bonducella, Entada scandens, Gyrocarpus Jacquini, Luffa insularum, Ipomœa pes capræ, Cassytha filiformis, Cocos nucifera.