Flora of Eniwetok — St. John 
315 
PURPOSE 
This account of the flora of Eniwetok is pre- 
pared in the form of a brief manual. It sum- 
marizes the flora, and it gives keys and brief 
descriptions to make possible the identification 
in the field of any of its plant species. Many 
types of research are being carried on now on 
the atoll. The investigators have diverse training 
and come from widely separated institutes. 
When their researches touch the terrestrial flora 
this manual will enable them to determine with 
certainty the identity of the plants. 
KEY TO SPECIES 
PTERIDOPH YT A 
1. Plants lacking flowers, reproducing by spores; frond pinnately lobed-.l. Phymatodes Scolopendria 
1. Plants with flowers, reproducing by seeds, 
SPERMATOPHYTA 
2. Flower parts in 3’s; leaves parallel veined; herbs, and trees but these without secondary wood, 
3 Trees MONOCOTYLEDONES 
4. Fruits aggregate into heads 15 cm. or more in length, 
5. Carpel apices concave, 
6. Phalanges 7.5-8 cm. long, 
7. Inner apical sinuses 2-3 mm. deep; syncarps globose ..2. Pandanus brachypodus 
7. Inner apical sinuses 1-2 mm. deep; syncarps ellipsoid 3. P. enchabiensis 
6. Phalanges 6.5 cm. long; sinuses 2-3 mm. deep.. 8. P. rectangulatus 
5. Carpel apices all, or at least the inner ones, convex or conical, 
8. Phalanges 7-9 cm. long, 
9. Inner apical sinuses 1-2 mm. deep; outer carpels much the larger 
7. P. pulposus 
9. Inner apical sinuses 3-6 mm. deep; outer carpels not much the larger, 
10. Phalanges 7-7.9 cm. long; tips of outer carpels conic and slightly 
divergent.... 9. P. rhombocarpus 
10. Phalanges 9 cm. long; tips of carpels pyramidal-semiorbicular, ascend- 
ing 10. P. Utiyamai 
8. Phalanges 5. 5-6. 5 cm. long, 
11. Phalanges 6-6.5 cm. long; inner apical sinuses 6-7 mm. deep. 
4. P. korrorensis 
11. Phalanges 5-6 cm. long; inner apical sinuses much shallower, 
12. Carpel apices rounded conic; phalange apices mostly convex; lateral 
sutures deep. 6. P. od,oratissimus var. novo-guineensis 
12. Carpel apices truncate to low rounded; phalange apices mostly trun- 
cate; lateral sutures lacking or few and shallow 
5. P. odor. var. novo-caledonicus 
4. Fruit of single, 1 -celled nuts, with edible white meat and potable water 
30. Cocos nucifera 
3. Herbs, 
13. Blade deeply lobed; umbel with dangling, threadlike, sterile branches 
33. Tacca Leontopetaloides 
13. Not so, 
14. Sepals 3; petals 3; ovary 3 -celled, 
15. Ovary superior; leaves linear, terete 31. Allium Cepa 
15. Ovary inferior; leaves broad strap-shaped, 7-10 cm. broad 
- - ...32. Crinum asiaticum 
